Why Cellulose Insulation is Better than Fiberglass Insulation

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  • เผยแพร่เมื่อ 23 พ.ย. 2024

ความคิดเห็น • 808

  • @Jonb01z28
    @Jonb01z28 7 ปีที่แล้ว +12

    This shows the exact problem i'm having in my home in FL. 75% of home has blown cellulose which works fairly well but over a faulted living room it has fiberglass. Ceiling dry wall temp in vaulted living room reach anywhere from 78-104 on a 90 degree day, rest of ceiling around house stays pretty constant at 74-75. Looking very soon to had more cellulose around entire attic as well as get rid of fiberglass on vaulted area to help improve comfort in home.

  • @marct4900
    @marct4900 11 ปีที่แล้ว +6

    There are many reasons why we prefer cellulose over fiberglass insulation. One is resistance to air flow. Take a look at the the material that your furnace or air handlers filters are made of - it may be fiberglass. Filters are designed to all air movement through them.
    Blown in cellulose insulation is 2-3 times denser than fiberglass insulation. Studies comparing blown in cellulose insulation vs. fiberglass insulation show that cellulose insulation was 38% tighter and required 26% less energy. A Princeton University study shows, a group of homes with blown in cellulose insulation in the walls had an average of 24.5% reduction of air infiltration compared to fiberglass insulation, with only the walls insulated. A similar study, the Leominster MA Housing Project for the Elderly found that, a building with blown in cellulose insulation compared to a building with R-13 fiberglass batt insulation in the walls and R-38 fiberglass batt insulation in the ceiling, had 40% lower leakage.

  • @Joewalshe38
    @Joewalshe38 7 ปีที่แล้ว +8

    It's worth mentioning that fibreglass insulation compacts over time so your 4" ceiling insulation laid 10 years ago might now be 1/2". It sags in stud partitions meaning there is no insulation at the top of walls where most needed.

  • @oneshotonekill8926
    @oneshotonekill8926 6 ปีที่แล้ว +15

    Everything he speaks of is true. I have used it, installed it, toured factories, made a living with both fiberglass and cellulose, all back in the 90's. This test is a very simple test, but it does show the basics. Cellulose has almost no convective action in it, fiberglass has a ton. C has a very low permeability, FG has a very high permeability. Either one will fail if it gets wet, but FG is worse as it is destroyed and never the same even if it does happen to dry out. C never loses its resistance to flames. Period. Those chemicals are safe for humans and never break down. Nice try though. Because of this, a house with C will take longer to burn down than one with FG. Period. It has been proven both in university testing and real world examples. C is regulated for flame resistance by the feds, FG is not because it doesn't stop flame but actually promotes it. As fire breaks into a FG insulated cavity, it will shoot up the cavity as the FG simply 'melts' away and the trapped air fuels the fire. C blocks and adsorbs sound transmission way better than FG can. C is safe to be around, FG is the next asbestos. Finally, R values are measured by the feds in a sealed cavity. If you use and unfaced batt in the wall, say in your basement and don't cover it with drywall to create a sealed cavity on both sides of the FG, it will not have an R13 value. FG that is open blown in attics never achieves the R value stated, mostly because of convective air circulation. Plus, FG is easy for the installer to 'fluff' when they install it, thereby using less bags to achieve coverage but giving a lower R value as installed according to the label. Always count the bags when they are finished to make sure they used the right amount. C installed in an attic will slowly settle some and create a smooth surface over itself that is slightly crusted, so to speak. The R values are stated at settled density, not installed. Finally, if you get mold on C, then you have much bigger problems than the mold! Stop the water!

    • @tlbfarm4473
      @tlbfarm4473 3 ปีที่แล้ว +2

      Fiber-crap is what I call it. I installed blown in cellulose in my first house in 1982 and every house since then. I have it in my current house and it's very energy efficient and quiet as a mouse.

    • @billymacktexasdetective5827
      @billymacktexasdetective5827 2 ปีที่แล้ว

      Did they teach you about paragraphs when you went to school?

    • @fvvfvbbbb
      @fvvfvbbbb ปีที่แล้ว

      @@billymacktexasdetective5827 This TH-cam none of that matters.... LOL
      You gotta give them credit for all that good info. 👍

  • @newstart49
    @newstart49 5 ปีที่แล้ว +20

    I had cellulose installed in my old 1946 walls. The house is so quiet, it's spooky.
    Blew it in the attic and went from a 4 ton ac (125k btu heater) to a 2.5 ton ac and I heat the home with only 38k btu's of heat. I also covered the ducting.

    • @ColeB-jy3mh
      @ColeB-jy3mh 5 ปีที่แล้ว

      newstart49
      Hey I read somewhere that the chemicals disappear making the insulation burn after 2-3 years...... would you be able to check if that’s actually true for me please??!??!

    • @fartman2269
      @fartman2269 4 ปีที่แล้ว +2

      @@ColeB-jy3mh No, that is incorrect.
      That is another urban legend started by fiberglass sales people.

    • @rezaghahreman86
      @rezaghahreman86 4 ปีที่แล้ว +1

      I have a old house in Toronto Canada. I am wondering if I can use cellulose for wall insulation. Doesn't make rot issue during time?

    • @fartman2269
      @fartman2269 4 ปีที่แล้ว

      @@rezaghahreman86 Cellulose insulated walls perform quite well compared to fiberglass, you shouldn't have any problems with "rot", as cellulose is hygroscopic, meaning it is capable of absorbing moisture, and able to release that moisture as well.
      As long as you don't have any water intrusion from the exterior, you should have no issues.

    • @HsingSun
      @HsingSun 4 ปีที่แล้ว

      ​@@fartman2269 In Florida, you bet hurricane and windstorm could cause leak through the roof.

  • @carlosb3169
    @carlosb3169 ปีที่แล้ว +4

    thank you! your channel and this video is still helping a ton of people even 10 years later!

  • @bloodsoakedwhiskers
    @bloodsoakedwhiskers 5 ปีที่แล้ว +11

    When you stick your hand into fiberglass it already feels hot inside. When you stick your hand inside of cellulose it has a slight cold feeling. Even on a very hot day... It's great stuff....

    • @MikeJones-rk1un
      @MikeJones-rk1un 3 ปีที่แล้ว +2

      No one mentions you shouldn't touch fiberglass insulation or even be near it without a mask and protective suit. Don't put it in your house.

  • @victorbunch1442
    @victorbunch1442 2 ปีที่แล้ว +5

    Very informative video sir. You have singlehandedly changed my direction of thought of how I should insulate my UNinsulated garage walls AND my open walled 24 X 30 ft shop. Thank you very much😁

  • @kilx81
    @kilx81 5 ปีที่แล้ว +5

    My mom is in the middle of renovating her new home. The brick walls were not insulated. Now there about 80 in the wall. I'm amazed that even though the attic is poorly insulated how much warmer it feels inside. And before we could hear people talking outside. Now I can't.

  • @gsneff
    @gsneff 5 ปีที่แล้ว +4

    Two types of insulation should do as well against fire: aircrete, which you mentioned, and rockwool.

  • @Veevslav1
    @Veevslav1 5 ปีที่แล้ว +20

    Your comparison was flawed. That particular lamp you used conveys a portion of its heat via light coming in contact with the surface. Light was penetrating to the thermometer. Which makes sense since fiberglass is supposed to use more air to try and stop temperature spread. We could explain more about it, but.
    Going forward the test should have had a thin piece of something else that completely stops light penetration. AKA black tar paper or for the most accurate, a piece of sheathing material.

    • @TheRealBiggerAl
      @TheRealBiggerAl 4 ปีที่แล้ว +3

      Veevslav1 and instead of placing the thermometer at the same depth in each box it should be placed at the same “R value” depth.

    • @bmo5082
      @bmo5082 2 ปีที่แล้ว +1

      Ya seeing this test is bogus. Who on earth exposes their insulation to the sun?

  • @marctannenbaum672
    @marctannenbaum672 11 ปีที่แล้ว +1

    Fiberglass batt insulation is tested and rated in laboratory settings. The batts are fully fluffed and in enclosed spaces (all four sides, top and bottom) with little or no air flow. The environment that the batts are tested under does not reflect how they are installed in your home. if on the attic floor, they are not fully enclosed and subject to getting dirty from "wind washing" - air movements through your ventilated attic. This dramatically reduces the effective R value of fiberglass

  • @arnelarson2849
    @arnelarson2849 5 ปีที่แล้ว +8

    In my opinion, you need to reconstruct the heat demonstration to control for the radiant heat from the lamp directly onto the top of the plexiglas. That is transferring some of the heat that the cellulose side is not. 1) Fill the fiberglas side to the top so it is equal to the cellulose side. 2) Place some foil on the top of both sides to reflect the heat from transferring through the plexiglas. 3) Place the thermometers on the bottom of each chamber to directly measure the heat transmitted THROUGH the insulation material and not the sides of the containers. Control for these factors, and your demonstration would be more accurate and more believable.

    • @Deploracle
      @Deploracle 5 ปีที่แล้ว +1

      It makes no sense unless the fiberglass is in it's installed state, not compressed down like the cellulose.

    • @charlesgravespainting750
      @charlesgravespainting750 2 ปีที่แล้ว +2

      Also in that diagram, the fiberglass thermometer was much higher up (almost a full centimeter) more than the cellulose thermometer… so DUH it’ll get hotter!

  • @functionalvanconversion4284
    @functionalvanconversion4284 7 หลายเดือนก่อน

    Great information. If you search life span cellulose has the shortest lifespan of all insulations. People also describe it become dust overtime.
    I try to reblow fiberglass rather than throwing it away if it doesn't have rat poo or other contaminants.

  • @jonathanbailey2021
    @jonathanbailey2021 2 ปีที่แล้ว +1

    I have been a building contractor for 40 years. I won't use cellulose because it easily absorbs and holds moisture. There is always some water that can penetrate walls during extreme weather events. The wet cellulose will cause mold and wood decay which can go undetected until there is significant damage. I stay with rock wool and closed cell foam for this reason.

    • @Victor-th8tb
      @Victor-th8tb ปีที่แล้ว

      Hello. What's attic insulation do you recommend for Orlando, Florida?

    • @zechariahhambone3841
      @zechariahhambone3841 9 หลายเดือนก่อน

      Rockwool just raised the price of the R15 batts from$58 to $79. And very difficult to find this stuff in the needed quantities.

  • @BrandonTran
    @BrandonTran 6 ปีที่แล้ว +9

    Wow incredible! I had this installed in my first house, walls and ceiling. I'm in my 3rd house now and it has fiberglass. I'm sad about that...

    • @1951walton
      @1951walton 2 ปีที่แล้ว

      Sadness is a very poor inulator!

  • @jccbsl1
    @jccbsl1 4 ปีที่แล้ว +2

    Wait a minute. Something doesn't make sense. Both insulation samples are labeled R13 which, as I understand it, means they should have the same resistance to transfer of heat.

    • @charlescrockett6208
      @charlescrockett6208 4 ปีที่แล้ว

      BECAUSE R VALUE IS 72 DEG F.
      FIBERGLASS LOSES R AT LOW TEMPS AND HIGH IN A BELL CURVE.
      IT LAYS DOWN WHEN YOU NEED IT
      CELLULOSE IS ALMOST FLAT LINE

    • @parkeranderson5074
      @parkeranderson5074 3 ปีที่แล้ว

      Charles Crockett WHAT DID YOU SAY???

    • @megw2359
      @megw2359 3 ปีที่แล้ว +1

      @@parkeranderson5074 I think what he's saying is that when they test materials for the R values, they do it under very controlled conditions like only at 72 degrees. But if you look at performance at higher and lower temperatures than 72 degrees, the R value of fiberglass is actually much lower than advertised. The graph of R value of fiberglass looks like a bell shape: highest at 72 degree but dropping off dramatically at high and low temperatures. Graph for cellulose is nearly flat, meaning that the R value for cellulose stays at the advertised number regardless of how hot or cold the environment.

  • @WilliamMcCormickJr
    @WilliamMcCormickJr 8 ปีที่แล้ว +13

    Over time, many years, about 20 to 25 years the cellulose insulation becomes flammable. It may be the dust that accumulates over time that causes it. It actually ignites by just touching a drop light with an incandescent bulb against the material. Many people that have homes that are old and have this material in the ceilings between the ceiling joists, actually build protective, constructions to keep this material away from light fixtures. Because it has started to smolder and ember, just being near the fixtures. Sincerely, William McCormick

    • @larrymaloney877
      @larrymaloney877 8 ปีที่แล้ว +6

      +William McCormick, thirty year old cellulose has been tested and shows no loss of fire retardant. . During the same thirty years installed fiberglass has remain non-fire retardant and not approved as a fire back or fire wall, Cellulose hos both those certificates. In fact , the paper used to cover fiberglass to protect the public catches fire and contributes to the spread of house fires. Your high pressure lies may trick ignorant folks into buying inferior fiberglass but sooner or later, an intelligent buyer gets that home and immediately has us vacuum out all the nasty fiberglass and install fire-retardant, superior cellulose insulation. They are amazed by the difference.

    • @larrymaloney877
      @larrymaloney877 8 ปีที่แล้ว +2

      +techtalk, sounds like you are gullible.

    • @WilliamMcCormickJr
      @WilliamMcCormickJr 8 ปีที่แล้ว +2

      I took a sample from a house, that experienced AC installers had started several areas of the insulation smoldering with red embers, by only touching the drop light to the insulation. Even after they started one area smoldering and extinguished it they started others. The house filled with smoke to a point it was suffocating. The guys in the attic got sick but were able to find and extinguish all the different areas that were smoldering.
      I experimented with it, and it was far too unstable to use as an insulation. I am going to see if I have some left. If I do I will make a movie of it being heated.
      If I was in the forest and I needed to make a fire without matches, I would want this stuff for kindling.
      I was told by a person that had spent a good portion of his life as a high ranking fire department representative that the insulation had been banned, for very real, very sound reasons. When I saw it again in Home Depot recently I thought the world had gone quite mad, for sure.
      Sincerely,
      William McCormick

    • @larrymaloney877
      @larrymaloney877 8 ปีที่แล้ว +1

      +techtalk , a chemistry major would not confuse boric acid with "things that have a half life". We are not talking about carbon dating 50 million year old dinosaur bones. The information you seek is available from the manufacturer. Antidotally speaking, I've personally removed cellulose from my parents home  which I personally insulated in 1974 and tested it for fire retarding qualities. It was fine.. Again, pay attention please,  Cellulose, not Fiberglass, is rated as a one-hour and a two hour fire wall. Cellulose is also one of the few means to create a fire stop. Again, those test results and certifications are available from each manufacturer who cares to have their particular product tested. Your opinion is between you and he manufacturers. To challenge their test results I suggest you contact one of them.

    • @larrymaloney877
      @larrymaloney877 8 ปีที่แล้ว +1

      +William McCormick , please direct me to the newspaper article that followed the alleged incident and which attorney is handling the liability lawsuit. I assume you can add credibility to your tale by documenting these obvious follow up results to your story. Or can you?

  • @CCCC-tq8yo
    @CCCC-tq8yo 5 ปีที่แล้ว +33

    The music in the background soooo annoying... 😂 rock on lol

    • @bdodson5
      @bdodson5 2 ปีที่แล้ว +1

      I agree. I had to stop watching it early just to stop that dopey music.

  • @desperado77760
    @desperado77760 5 ปีที่แล้ว +2

    does any paper need to be put down first? What about dust coming into the house from cellulose as it ages and settles? Is this just blown in or is something done to make dense-pack? What I'm asking I guess is, if put in the attick is it just blown in or does it need to be compressed some way?

  • @dw6015
    @dw6015 6 ปีที่แล้ว +1

    Problem with the model is there isnt that much radiant heat concentrated on insulation in an attic so it's not an accurate representation of the conditions in an attic unless the homeowner installed heat lamps up there.

    • @Casmige
      @Casmige 2 ปีที่แล้ว

      It’s just a simple test ....oh my God these scientists in the comment section just wanna over complicate and find fault with everything.....

  • @tlbfarm4473
    @tlbfarm4473 4 ปีที่แล้ว +1

    At 5:00 when talking about burning insulation materials, you don't mention Roc Wool. Why not? What is Rock Wool's burning characteristic's vs. cellulose, fiberglas etc.?

  • @Flielow
    @Flielow 6 ปีที่แล้ว +3

    Is all cellulose insulation the same or are there lesser quality types? Such as Cellulose insulation with out a fire resistance qualities or with out Boric Acid??

  • @CantankerousOB
    @CantankerousOB 6 ปีที่แล้ว +2

    The problem is he doesn't show an R value in those tests contraptions. If you see actual blown insulation it's very light and fluffy whereas his test area it's extremely compacted. The R-value of blown insulation changes dramatically over time as the insulation settles down. The biggest benefit to blown insulation is it will fill every nook and cranny with little or no gaps between. However you'll need a much thicker layer of blown insulation to accomplish what fiberglass will. Both work extremely well, and cellulose is considerably cheaper, but to say one is better than the other is Up For Debate.

    • @realtyrocks1969
      @realtyrocks1969 ปีที่แล้ว

      Yes he does. It said on the label R13

    • @CantankerousOB
      @CantankerousOB ปีที่แล้ว

      @@realtyrocks1969 no shit it says R13. R13 is 4" thick, does it look like his thermometer is 4" from the surface where the light hits it?

  • @creektilghman9187
    @creektilghman9187 5 ปีที่แล้ว

    You found a very thorough step-by-step instruction and a very thorough project on Avasva.

  • @larryjanesky8185
    @larryjanesky8185 10 ปีที่แล้ว +20

    Hey thanks for the haircut suggestion! I got one! Larry

    • @ryan_nicolas
      @ryan_nicolas 9 ปีที่แล้ว

      looking good Larry!

    • @CyberChicChick
      @CyberChicChick 9 ปีที่แล้ว +2

      +Larry Janesky I wish you HADN'T gotten your hair cut! You looked HOT with the style you had - like Jon Bon Jovi! Just go ahead and grow it on back. RJ, you look like a friggin' dork, NERD!!

  • @cameratest
    @cameratest 8 ปีที่แล้ว +22

    I don't understand - the R-value is a measure of how well a material insulates. Different materials may require different thicknesses or costs to achieve R13 but as long as both are R13, they should insulate equally well by definition. Isn’t this like saying a ton of bricks is heavier than a ton of feathers?

    • @kennethflorek8532
      @kennethflorek8532 8 ปีที่แล้ว +3

      Materials with high R values get that high R by trapping tiny air spaces, the more there are and the tinier they are, the better. The controlled conditions under which R value is measured use a low difference in temperature of the two sides, keeping air circulation inside the material low. With high temperature differences, air begins to circulate through the glass fibers more and the measured R drops, much less so with packed cellulose fibers.

    • @larrymaloney877
      @larrymaloney877 8 ปีที่แล้ว +2

      cameratest. your confusion is understandable. R-value does not measure how well the insulation stops air infiltration. An air infiltration test shows that. Cellulose is far superior. Add that to the superior R-value and it's an easy choice.

    • @carlsaberhagen628
      @carlsaberhagen628 6 ปีที่แล้ว +2

      You're correct: "R value" is "R value," regardless of the material. However, the the "R Value" isn't the only factor (is the material properly installed, are joists exposed, etc.), unfortunately--it's just the best, shortest way the industry can market their product.

    • @jerrysmith7166
      @jerrysmith7166 6 ปีที่แล้ว

      cameratest All of that shit is complete garbage and less you use foam insulation highly recommended

    • @MrVocalBaby
      @MrVocalBaby 6 ปีที่แล้ว

      the problem with foam is that it goes out through the plugs

  • @lindaraidl663
    @lindaraidl663 5 ปีที่แล้ว +15

    looks like theres just a tad less fibergass from here. That could account for the 1 degree diff and the temp sensors should be at the bottom and not near the top

    • @yourlocalscribe948
      @yourlocalscribe948 4 ปีที่แล้ว

      5:35 looks like 20 degrees not 1
      4

    • @starleyshelton2245
      @starleyshelton2245 4 ปีที่แล้ว +1

      if both have the same r value then both should have the same heat resistance. so... there should be no difference. However it does take more in inches for batt to match blown.

  • @Heathh49008
    @Heathh49008 11 ปีที่แล้ว +8

    You have only shown that the cellulose is opaque.
    Cellulose is pushed because it's cheap. It has a better mark-up, that's why they push it so hard even though it compresses so badly, is so attractive to vermin, and has so many moisture issues.

    • @dabcorn
      @dabcorn 10 ปีที่แล้ว +3

      Fiberglass is the same crystalline structure as ASBESTOS. I put cellulose in only 150sqft more of my home as the neighbor has in his exact same 1200sqft housing project home built to federal/ state/ building codes, my electric bill is consistently $100 LESS than any of my neighbors that have fiberglass where I have cellulose.

    • @Heathh49008
      @Heathh49008 10 ปีที่แล้ว +2

      dabcorn
      By that logic so is a diamond ring. Or salt. CRYSTALLINE JUST LIKE ASBESTOS!!!!
      What you have in your home doesn't matter. Do the two homes have identical floorplans/windows/structure/color, sunlight exposure, HVAC systems AND share a common thermostat?
      If not, then what you pay has nothing to do with your neighbor.
      Are you a moron? Wait... Rhetorical question.

    • @dabcorn
      @dabcorn 10 ปีที่แล้ว

      salt dissolves in the body and is processed by it. BARIUM is a toxic metal that can be absorbed into the body and sits unprocessed and unexpelled UNLESS it is in particular compounds, then it is not absorbed and is stable and safe and can be expelled. I am not aware of any diamond fiber products. Asbestos & similar glass, fibers ARE not dissolved nor processed by the body. The fibers accumulate, and cause abnormal cell growth in damaged areas (cancer). Mesothelioma and other lung diseases are direct results of exposure to crystalline mineral fibers such as asbestos... But any dust/ fiber, etc, even unprocessed plant fiber is not good to inhale over a long period.

    • @Heathh49008
      @Heathh49008 10 ปีที่แล้ว

      dabcorn
      Barium also has fuck-all to do with fiberglass, cellulose or this conversation.
      As for diamond fiber products, graphite, graphene, and carbon nanotubes are all forms of carbon that could be considered fiberous and closely related to diamond. But carbon/diamond dust (abrasive process dust, mining, etc) would be a greater health threat. See also silicosis.
      You say "processed by the body"... actually they are removed from the lungs slowly by ciliary processes. This is often too slow, or stunted by smoking, leading to dangerous levels and possible issues such as mesothelioma.
      But again, you have no evidence that fiberglass is any danger in the form of insulation. Not the old stuff, or the newer "Attic cat" type that is so much like cotton candy that it doesn't even itch or produce dust during installation.
      You are a moron.

    • @dabcorn
      @dabcorn 10 ปีที่แล้ว +4

      Heathh49008 Yes, I may be a moron. I worked in insulation for years. However, cellulose proved to be a fine product for both installers and homeowners. It is magnitudes less energy consuming to produce. I can tell you feel strongly that fiberglass is a worthwhile insulation product. That has just not been my personal experience with it. I have though, used it for aircraft cowling. As a pool filter sand tank it has stood up very well, as have the garage doors. Anyway...we all need to follow the OSHA dust mask regulations.

  • @markchidester6239
    @markchidester6239 4 ปีที่แล้ว +1

    So what you are saying is that the R value is actually higher per inch than fiberglass?

  • @pipersson9258
    @pipersson9258 9 ปีที่แล้ว +2

    *Fiber glass insulation is a proven performer amongst insulation products*. It provides exceptional thermal performance, moisture and mold resistance and fire protection. The two named builders below noted that fiber glass is their top choice for insulating homes. “As a builder, we are selling an energy system. And fiber glass is the answer for energy efficiency,” said Bill Decker Sr. Wayne Homes is an award-winning regional builder with a presence in Ohio, Pennsylvania, Indiana, Michigan and West Virginia - producing between 500-1200homes per year. Decker Homes builds high-end custom homes across southeast Michigan and northwest Ohio. He says Decker uses fiber glass for all it's homes.

    • @jimdavidson5208
      @jimdavidson5208 8 ปีที่แล้ว

      +J.D.Roche Wrong, 1/8" of closed cell foam will outperform 2 feet of fiber glass. Fiber glass is NOT an air barrier OR moisture barrier what so ever. So how can it stop energy transfer? Answer it doesn't. The best type of insulation is closed cell foam with fire retardant.

    • @pipersson9258
      @pipersson9258 8 ปีที่แล้ว

      +jim davidson FOAM INSULATION IS A CONFIDENCE TRICK. I met a clent who had paid a fortune for it, weeks later he scraped it with his fore-finger nail and it crumbled into little pieces like polystyrene does, naturally he rung to complain and got this message "the number you called is no longer recognised" please check and try again. Water settles into SPRAY foam, so in winter it expands and drops away from the roof, it's made with a water--mix. It get worse they charge $3000 for $300 foam and labour. Google Spray Foam Scams on Google. (And How can a MICRO-THIN 3mm layer of flimsy foam beat 24 inches of Glass Fiberglass-this alone tells me you're a scammer).

    • @pipersson9258
      @pipersson9258 8 ปีที่แล้ว

      +Alex Blake // When used as rigid board insulation its chemistry and manufacture is similar to foam, to foamed polyurethane. As the board stiffness increases so does it's brittleness increase making handling it unstable on building sites, where rough treatment and handling is the norm. Firms who make and sell it have tons of damaged board seconds for this reason.

  • @Soprano0913
    @Soprano0913 3 ปีที่แล้ว +1

    Great video what about comparison of cellulose vs rockwool

  • @Warcats15
    @Warcats15 11 ปีที่แล้ว +5

    I don't understand how they are both R13 if the cellulose is performing better

    • @briangc1972
      @briangc1972 5 ปีที่แล้ว

      Exactly correct. If they are rated the same, then their resistance to heat transfer is the same.

    • @larrymaloney877
      @larrymaloney877 5 ปีที่แล้ว

      The cellulose stops air infiltration missed by fiberglass.

    • @hotrodhog2170
      @hotrodhog2170 5 ปีที่แล้ว

      @@briangc1972 Cellulose has an R value of 3.8 per inch, fiberglass is 2.7 per inch. Insulation is lab tested at a mean temp of 70 degrees. When the temp is dropped to 0 degrees, fiberglass loses 48% of its rated R value and Cellulose gained 10%.

  • @pedrompneves
    @pedrompneves 5 ปีที่แล้ว +2

    Dear Larry Janesky,
    Thank you for all the information about fiber cellulose.
    I am from Portugal, and I will apply the cellulose insulation. The company that is going to apply it recommends 15cm (about 6 inches) high in the attick floor (cement attick). Do you think that's enough to do a good performance in Portuguese weather (between 5 and 35 degrees celcius)? Looking foward to your opinion. Thank you.

  • @CaseyBieker
    @CaseyBieker 2 ปีที่แล้ว

    A problem with Cellulose is the in a normal 8ft wall, it settles a lot over a couple of years and the top foot or two of wall now has no insulation. We can take a thermal camera and see that in nearly all of our exterior walls, the insulation has settled leaving significant cold or hot spots.

    • @cademarti1365
      @cademarti1365 2 ปีที่แล้ว

      Blow it in before sheet rock and they put a glue additive with it to adhere to the area it goes on. I owned a 20 year old barn that was shot inside completely even under the roof panels and it never fell off

    • @CaseyBieker
      @CaseyBieker 2 ปีที่แล้ว

      @@cademarti1365, obviously whoever built this house didn’t do that. Not sure what was available in 1978 but it’s definitely just loose in there.

  • @georgeghali304
    @georgeghali304 5 ปีที่แล้ว +1

    I have a questions which one is better blown cellulose or blown fiberglass? There are 2 options at home depot fibergreen cellulose or Owen Corning Attic CAT fiberglass . Which one would be better for Dallas area?

  • @vegafrenchies6984
    @vegafrenchies6984 10 หลายเดือนก่อน

    The fiberglass bay should be as full as the cellulose. Seems to be 1/2" to 1" short from the level of cellulose. You can peel some more pink fiberglass and make it balanced.

  • @rezaghahreman86
    @rezaghahreman86 4 ปีที่แล้ว +2

    I have a old house in Toronto Canada. I am wondering if I can use cellulose for wall insulation. Doesn't make rot issue during time? Any comment please?

    • @mikemiller9891
      @mikemiller9891 ปีที่แล้ว

      What did you come up with? I can't find Rockwool blow in anywhere...

  • @oneshotonekill8926
    @oneshotonekill8926 6 ปีที่แล้ว

    One other comment too. C has no requirement to be kept away from light fixtures or heat sources any more than FG! That is completely bogus. In my neck of the woods, they are treated the same as to the installation next to fixtures, chimneys, recessed can lights, flues, etc. Houses here are not burning down left and right! I have been in many 1950's houses with C and FG, never have I seen a problem with either one next to any of the aforementioned items. However the one thing I always saw, dirty FG around air leakage points! The FG acts like an air filter for all the air coming by and through the leakage site. RC, lights, pipes, soffits, open top wall assemblies, etc.

  • @robburkhard9256
    @robburkhard9256 5 ปีที่แล้ว +5

    I do fire/water restoration and have found that cellulose always breaks down and turns to half powder where fiberglass is in much better condition and its also much cleaner to pull up. Also, almost every time i go to a house in the winter and the snow is partially melted in the middle, when i eventially go up in the attic i find cellulise not fiberglass.

    • @fartman2269
      @fartman2269 4 ปีที่แล้ว +3

      Old cellulose is more fiberized than the newer cellulose, which is why it seems more dusty, it was made that way, it doesn't just break down over time....
      This does not affect the performance, 6" of 40+ year old cellulose will still outperform 11" of blown fiberglass on the coldest day of the winter.
      If you have noticed snow melted areas on the roofs of these older houses you've mentioned, most older homes are notorious for attic bypass problems.
      That is when heated air from the basement flows up to the attic through chimney, and plumbing chases, to name a few of many sources.

  • @linwoodvleegmailcom
    @linwoodvleegmailcom 5 ปีที่แล้ว +1

    why is no one talking about VACUUM INSULATED PANELS ??

  • @thcint
    @thcint 8 ปีที่แล้ว +2

    You should test Hemp insulation batts and Hempcrete. You will see it outperforms everything you've shown by miles. Fireproof, waterproof, antimicrobial, antibacterial, R values, everything. Put it to the test, you will be blown away!!

    • @carrieb417
      @carrieb417 8 ปีที่แล้ว +1

      where does one buy hemp insulation?

    • @thcint
      @thcint 8 ปีที่แล้ว

      Currently, France is the best place.

    • @thcint
      @thcint 8 ปีที่แล้ว

      Here is a great way to learn all about building with Hemp www.thcint.com/thcint-blog/the-evolution-of-hempcrete-and-hemp-construction

    • @bmo5082
      @bmo5082 2 ปีที่แล้ว

      Man I’m glad I can get this material from France. Free shipping to USA?

  • @jmar8507
    @jmar8507 4 ปีที่แล้ว +1

    What happens if it gets wet, like from a roof leak?

  • @Mr502500
    @Mr502500 4 ปีที่แล้ว +3

    Excellent video Doc Thanks for the information

  • @yalezhang8831
    @yalezhang8831 4 ปีที่แล้ว +2

    Borax sounds useful for keeping dry wood termites out of the attic, which a previous owner at my condo had. That demo showing cellulose heating up less than fiberglass seems too good to be true because it's denser with higher specific heat, which would be a problem to cool down in the evening. What I want to know is the temperature after a few hours.

    • @HsingSun
      @HsingSun 4 ปีที่แล้ว

      Hi, do you still use cellulose in your attic?

    • @yalezhang8831
      @yalezhang8831 4 ปีที่แล้ว

      @@HsingSun No, I never have. I'm in northern California where winters aren't that cold, so the attic has the old fiberglass insulation.

    • @bmo5082
      @bmo5082 2 ปีที่แล้ว +1

      I take some issues with his test. First and foremost, he is using a light for the heat source in the test. The light emits radiant heat, which can penetrate a translucent or transparent material. All insulation in your home is covered and protected and not directly exposed to any light.
      This would be like comparing the R Value of a double pane window and a half inch sheet of OSB. Obviously the sheet of osb is going to perform better at the onset because it’s going to block all the light, but the window itself has a better performance rating than OSB for obvious reasons.
      Additionally, fiberglass batts really aren’t used very much anymore in new construction ceilings. The typical insulation is a blow in fiberglass wool
      With all that said, I’m sure cellulose is a good insulation material, but personally I will stick with fiberglass as they are more common in my area.

  • @ansis9970
    @ansis9970 5 ปีที่แล้ว +1

    In your test, isn't light bulb acting as radiant heat source? Hence making your test more accurate representation of summer testing (to keep away Sun's heat from living space) opposed to winter testing (to keep heat trapped inside living spaces)?
    As an example, I am quite sure that aluminium foil would perform very well in your light bulb test because it would reflect away radiant heat. But yet people rarely (if ever) use aluminum foil alone to insulate houses for winter conditions, because foils are not not that efficient to limit heat loss due to convection.
    It could be that with convection heat test you will still reach the same conclusion that fiberglass is better than cellulose. However, I think it is not correct to extrapolate your test for winter conditions.

  • @chrisdixonstudios
    @chrisdixonstudios 8 หลายเดือนก่อน

    It also very clearly shows much less Fiberglass insulation over top of thermometer less dense than cellulose (light penetration). You forgot to mention that fiberglass Far outlasts cellulose like 100 years vs 50. It is very impressive however how well cellulose insulates and is fire retardant, cool! Cellulose also fluffs back better than fiberglass if compressed. Probably most important is the cost of cellulose is only about 30% cost of fiberglass, so boom you win!

  • @stevenbourbonnais4030
    @stevenbourbonnais4030 2 ปีที่แล้ว

    Down fall I have it in my attic and it settled under rafters and left a gap 1/4 inch and it's creating condensation and ice then when it gets hot outside it melts and creates wet newspaper

  • @bigears4426
    @bigears4426 6 ปีที่แล้ว +2

    If you have r4 fibreglass or r4 cellulose its the same and bats are easier to move for work on wiring , and you can lay bats yourself

  • @VishalRaoOnYouTube
    @VishalRaoOnYouTube 5 หลายเดือนก่อน

    My house was built in 2022 in central Texas and the insulation doesn't look like either you've shown. It looks pure white like cotton and it is very light and fluffy. Any idea what it is?

  • @scottsmith4145
    @scottsmith4145 4 ปีที่แล้ว +1

    Interesting that in your burn test you didn't test mineral wool.... Why?

    • @timkr66
      @timkr66 3 ปีที่แล้ว

      Mineral wool can resister fire better than cellulose from what I've seen.

  • @bigfirepop
    @bigfirepop ปีที่แล้ว +1

    What I don't understand here is that for the same R rating, cellulose requires LESS material. So why are both the same size in height, length, width yet both say R13 .. Note, I am not an expert by any means

  • @africancichlids3011
    @africancichlids3011 8 ปีที่แล้ว +1

    is a box spray insulation better than using a r 19 6 inch thickness ,, i need to redo my attic , when u use the spray do u still , need to add a vapour barrier , im assuming the plastic is better than the paper . , can u spray the insulation foam in a box . onto the barrier have like 6 inch thickenss then just add some r 19 insaltion fibre over the top of that or better to add the cellulose on topp of the box foam

  • @JM-nh8yp
    @JM-nh8yp 4 ปีที่แล้ว +1

    Brought to you by the cellulose insulation industry.

    • @blackfootchata86
      @blackfootchata86 3 ปีที่แล้ว

      🤣🤣 I just got fiberglass blow in insulation, after watching this. I'm really rethinking my decision

    • @JM-nh8yp
      @JM-nh8yp 3 ปีที่แล้ว

      @@blackfootchata86 I have used fiberglass blow in. I think they all have advantages and disadvantages. In walls, I think cellulose settles more than fiberglass. Blow in fiberglass probably seals out air leaks better than the roll out fiberglass in some cases too. The person that made this video isnt listing pros and cons of each. The video seems really one sided and biased. You might see another video that makes fiberglass sound like the best thing to use.

  • @johnscott2330
    @johnscott2330 10 ปีที่แล้ว

    I'm wanting to insulate an old schoolhouse building built in 1872. It is located in a remote wooded area. There is also a lot of moisture in the area given the structure is located on a watershed and on the edge of a creek. Does cellulose settle more than fiberglass, therefore, over time, not providing the R-value it did when first installed? Also, I battle mice. I will have to blow it into existing walls through holes. Is one insulation product better than another in being distasteful to mice? Or do mice just love it all? Thx!

  • @histubeness
    @histubeness 4 ปีที่แล้ว +3

    When you did the attic insulation re-do, why didn't you remove the old, dirty fiberglass batting, and just fill with cellulose? Why leave the higher fire danger batting there, underneath?

    • @TrendyStone
      @TrendyStone 4 ปีที่แล้ว

      Fiberglass + cellulose is more efficient than JUST cellulose.

    • @MikeJones-rk1un
      @MikeJones-rk1un 3 ปีที่แล้ว

      Handling fiberglass insulation in any way is something to be avoided.

  • @MrDahkilla
    @MrDahkilla 11 ปีที่แล้ว +1

    Do you sell them also as structural insulated panels ???

  • @pollyanna163
    @pollyanna163 9 ปีที่แล้ว +7

    Turn the friggin music off. What the use???

  • @bobbienovak5573
    @bobbienovak5573 7 ปีที่แล้ว

    should you seal up all the little awning leaks from the inside or outside before re- adding insulation? my house is 64 yrs old & desperate need for new insulation.

  • @tech29X
    @tech29X 6 ปีที่แล้ว +5

    Your video is deceptive;
    1) You used much thicker insulation on cellulose side and
    2) thermometer on fiberglass is placed slightly higher, closer to the light bulb.
    It is true that cellulose provides slightly higher R value per inch, but cost per 1R and weight per 1R favors fiberglass insulation. Meaning; you can achieve same insulation value of cellulose by using thicker fiberglass insulation and fiberglass would cost slightly less and weigh far less even if it's applied thicker. On the other hand cellulose reduces noise better. How much load can your ceiling hold???

  • @jwisdomful
    @jwisdomful 4 ปีที่แล้ว

    Is cellulose also the healthiest Insulation for the house? My son has some breathing problems and I want to make our house healthier.

  • @bobsilvern4909
    @bobsilvern4909 9 ปีที่แล้ว +43

    The temperature test is bogus! It is deceptively designed to measure the materials' ability to block infrared and visible radiation from the bulb rather than thermal conductivity which is an entirely different property. A more fair test would require placing an opaque surface, e.g. a piece of drywall, on top of the insulation to block the radiation and actually measure the conduction which is all we are concerned with in any real-world setting.
    Another tip-off: Both materials are ambiguously labelled R-13. R value has a meaning only when specified for a product with a defined thickness. Assuming the meaning of the labels was that each side, in the tested thickness, provides an insulation value of R-13, then both must conduct the same amount of heat by definition. They cannot differ in any fair test of thermal conduction.
    I was planning to insulate my home with cellulose, but after seeing this slimy act of deception I will reconsider that decision.

    • @johnsmith9782
      @johnsmith9782 9 ปีที่แล้ว +3

      Bob Silvern Yes, this is classic hoodwinking here with that test, from the obviously observed issues to a host of other unseen factors. It fools some folk all the time, and these tests are designed by manufacturers and paid promoters, and you would have to be pretty dull not to see through it. We live in a 'anything for a buck' culture.

    • @stephenvonwaldner9374
      @stephenvonwaldner9374 9 ปีที่แล้ว

      Ki I

    • @ralphinator2
      @ralphinator2 9 ปีที่แล้ว +3

      +Bob Silvern After they just showed you how well it works, you decide not to use it? No, thermal conduction is not all you need to think about in the real world. Convection air current travels right through fiberglass, and the siding of the house radiates heat just like that lightbulb does. Unless you are planning to wrap your house in aluminum foil, you also need to block radiation heat transfer.

    • @bobsilvern4909
      @bobsilvern4909 9 ปีที่แล้ว

      ralphinator2 The convective properties for cellulose compared to fiberglass may or may not be better. I do not know and the experiment performed in the video does not attempt to measure this. People who have large openings in their walls through which there is notable airflow should probably just caulk those cracks rather than rely on in-wall insulation to block the air flow.
      As for your claim that "the siding of the house radiates heat just like that light bulb does", you are mistaken. The total radiated energy of an object is proportional to its absolute temperature raised to the fourth power. The incandescent light bulb temperature is about 3000K, compared to a warm wall at let's say 130F or 328K. The radiation from the wall compared to the bulb is therefore in the order of (328K/3000K)^4, or about 0.014%. This is why the bulb radiates blinding light and scalding heat, and the wall does not.
      To summarize, in real world applications, the conduction of an in-wall insulation material is by far the most important property compared to radiation or convection. The "experiment" in the video is grotesquely flawed in that while it claims to measure the conduction of the material, by directly irradiating the material with an incandescent light bulb (a 3000K visible and infra-red emitter), it is primarily measuring the material's ability to block transmission of that radiation rather than its conductive properties. Had they actually measured the conductive properties, they would have found them to be identical because both were specified as R-13.
      I don't have a strong preference for one type of insulation over the other, but I would certainly avoid doing business with Dr. Energy Saver after seeing how they attempt to deceive potential customers with a clearly bogus demonstration.

    • @ralphinator2
      @ralphinator2 9 ปีที่แล้ว +2

      Bob Silvern Cellulose is very good at stopping convection while wind blows right through fiberglass. It can be used for air filters. Convection transfers heat from the outer wall to the inner wall. You are right that there is an exponential difference in radiation, but the square footage of a wall goes a long way to making it matter. If you stand near a stone or brick wall at night, you can feel the radiation coming off it.

  • @MrEvangall
    @MrEvangall 4 ปีที่แล้ว +1

    Is no one going to comment on the blown in cellulose is dense packed vs the regular fiberglass batts?

    • @JM-nh8yp
      @JM-nh8yp 4 ปีที่แล้ว +1

      Yes, I'd like to see a pound for pound comparison with the same density and seal being formed around it. Maybe a comparison with blown in fiberglass?

  • @worldhello3946
    @worldhello3946 4 ปีที่แล้ว +2

    My cellulose in attic generates a tons of dust and make my room dusty. How do you pretend dust goes outside then go to your room?

    • @morehp1
      @morehp1 4 ปีที่แล้ว

      You most likely have poor hvac ductwork putting the house in negative pressure

    • @HsingSun
      @HsingSun 4 ปีที่แล้ว

      Good question.

  • @23skido
    @23skido 4 ปีที่แล้ว

    Do i need a vapor barrier on inside of wall? Would tyvek or typar be a good blanket to cover wall with before filling wall cavity?

  • @vbezbradica
    @vbezbradica 8 ปีที่แล้ว

    Few words. When comparing cellulose and fiber glass insulation as a insulation materials is good to say that first of all he didn't put same thicknesses. Ok it is with same R value, but why you didn't compare thicknesses with same peformance regarding thermal stability? . Second thing which has to be counting on is price of materials. It is fact that cellulose has better heat capacity, and higher density which refers to heat wave conduction in summer days through construction, but for some fiberglass thicknesses ( higher than cellulose ) ,with better thermal conductivity you can get same results (in living comfort), but with lower price. ( I would like to mark winter time, where you have much bigger energy saving with fiberglass for less money)
    Good approach would be to compare cellulose and fiberglass insulation with same results for thermal stability of construction , and to see what are the costs?
    Also you have to compare installation costs, and whole costs in life cycle of material.
    If the roof or wall is ventilated (what is recommended) , than influence of the heat wave during the summer days is not so important.
    Only if you consider whole this things you can talk about quality of some material for some application. Such approach ( in video above), gives you one side of the story, and other one seems is good not to be revealed :-)
    Cheers

    • @hotrodhog2170
      @hotrodhog2170 5 ปีที่แล้ว +1

      All insulation is lab tested at the mean temp of 70 degrees. When the temp is dropped to 0 degrees, fiberglas loses 48% of its R value where Cellulose gained 10%. So in the winter when you need that good R value, the R-38 in your attic is now an R-16. Which do you prefer?

  • @ffuller83
    @ffuller83 3 ปีที่แล้ว

    Mr. Larry can you refer me to such a superb service as yours in Cottondale, ALABAMA?

  • @damyonfinch8521
    @damyonfinch8521 7 ปีที่แล้ว +2

    Why arent the thermo sensors at the bottom. Not the middle?

  • @markpitcher2357
    @markpitcher2357 3 ปีที่แล้ว

    Is compaction a problem with blown in cellulose or fibre glass, causing lose of performance in R value.

  • @africancichlids3011
    @africancichlids3011 8 ปีที่แล้ว +4

    do they make hemp insulation yet i know they make hempcrete

    • @dennisgarber
      @dennisgarber 4 ปีที่แล้ว

      Then, people would be burning their own houses down, on purpose, just for a few inhales, when they couldn't afford their weed . Imagine how long the installers would drag out the insulation process, and all the smoke they would make!

    • @AaronCook83
      @AaronCook83 4 ปีที่แล้ว +3

      This is exactly the kind of moronic reply that is keeping hemp from being widely used.

    • @maneatinghobo113
      @maneatinghobo113 3 ปีที่แล้ว

      @@dennisgarber shame on you

  • @bigzee456
    @bigzee456 11 ปีที่แล้ว

    What if you have fiberglass in your walls. How can you improve those areas that are inside your wall? Can cellulose be added?

  • @ColeB-jy3mh
    @ColeB-jy3mh 5 ปีที่แล้ว

    How old is the mold farm??? This is a crucial question!!!!!!!!!!!!!!

  • @giuseppepippoizzo6506
    @giuseppepippoizzo6506 ปีที่แล้ว

    Excellent video explaining , accurate information. Great information

  • @pdknopf
    @pdknopf 6 ปีที่แล้ว +2

    Larry, any recommendations of installers in southern ca?

  • @2awesome292
    @2awesome292 8 ปีที่แล้ว

    the fiberglass batts in my attic are laid perpendicular to the joists and they are extremely dirty from the air leaks, should i fix the air leaks, remove (or just put em parallel to joists) and blow in cellulose?

    • @deanbenton5098
      @deanbenton5098 8 ปีที่แล้ว

      do both, you will address the conductive AND convective heat transfer occurring in the area

  • @findingnimo4707
    @findingnimo4707 6 ปีที่แล้ว +1

    Super vdo....vry helpful...pls tell me if i cn make cellulose foam at my home?can u tell necessary ingredients n process..plz hlp... Im from india

    • @joemonroe9456
      @joemonroe9456 6 ปีที่แล้ว +1

      mix detergent with packing peanuts.

    • @forzaitaly1
      @forzaitaly1 4 ปีที่แล้ว

      He liked your DIY recipe so much he mixes it with his salad too!!!

  • @babybear4524
    @babybear4524 3 ปีที่แล้ว

    I dont understand why so many people choose to put in fiberglass since it heats up so fast. Why is it a big seller at Home Depot and offered by installers? For houses in the southwest would additional insulation be the first line of defense to combat hot summers or/and must you combine that with a whole house fan or attic fans? Thanks. where are you located?

    • @bmo5082
      @bmo5082 2 ปีที่แล้ว

      This test is kind of bogus. A black plastic bag would perform better than a triple pane window on his temperature test because he is factoring in radiant heat. When have you ever seen insulation exposed to the sun in its final application? You don’t, it’s always tucked in a wall or ceiling.

  • @bluegorillacookies
    @bluegorillacookies 3 ปีที่แล้ว

    Great video....What about rodents nesting? Does the boric acid repel them? Thanks

  • @MrElteacher24
    @MrElteacher24 8 ปีที่แล้ว

    Laurin N that's why is so important to do a seal out of attic space leading to living area before installing cellulose insulation ( seal around anything that leads into attic like... ceiling fans, can lights, bathroom fans etc. if you do have an attic hatch make sure is proper sealed with weather stripping or a light caulk around perimeter but remember .. attic space needs to be accessible. I hope this info works for you.
    before I forget if your a.c. duct lines are in the attic space make sure they are all sealed correctly, this includes air handler.

  • @jimwhittaker5028
    @jimwhittaker5028 5 ปีที่แล้ว

    I have about a 1 ft. overhang around my home. Vents under the eves are separated by about 8 ft apart. Do i need to fill the over hangs were there is no vent. Also, my roof is very low with only 2 1/2 ft of room down the center. Your thoughts on this?.

    • @waynemansur2162
      @waynemansur2162 5 ปีที่แล้ว

      Jim, my first response to "Your thoughts on this" is to sell the house. OK, my tongue is in my cheek when I say this. If your home has an "open attic" (air from the outside actively moves in and out of the attic) then you do not need to address the over hands.
      As to the 2.5 foot of room, it will be quite difficult for an employee to crawl around on his back and work. Good luck. Be sure to keep the attic OPEN to allow air circulation.

  • @chrisdesimone4249
    @chrisdesimone4249 3 ปีที่แล้ว

    HI, do you have a location in North New Jersey?

  • @One1vision
    @One1vision 10 ปีที่แล้ว +2

    Why are they both R13 then? Would not in this example the cellulose be a higher R Value if it works so well?

    • @imzjustplayin
      @imzjustplayin 10 ปีที่แล้ว +1

      Because the way they test R13 fiberglass insulation is under test conditions that are favorable to fiberglass. I.e. The Fiberglass will do acceptably if you have perfect conditions but in all other scenarios it does poorly. FIberglass is shit and like most things in life, the most popular option isn't usually the best option.

    • @larrymaloney877
      @larrymaloney877 9 ปีที่แล้ว

      +One1vision , The are several primary differences between fiberglass and cellulose, One is fiberglass lets air leak past and cellulose does not. The hot air form the light leaks past eh fiberglass to the thermometer. That's what happens in yrou attic and walls and crawlspace or basement.

    • @Shadowkhn
      @Shadowkhn 7 ปีที่แล้ว +1

      You pretend to be an expert, and say things like hot air goes down to the thermometer. HOT AIR ALWAYS GOES UP, the only reason thermometer shows higher temeperatue for glasswool is the infrared getting through. WHICH IS IMPOSSBILE IN REAL WORLD SITUATION. If you put a paper sheet on both materials, there will be 0 difference between 2 chambers, because they have the same R value, whic considers all types of thermal conductivity. Shame on you, sir.

    • @waynemansur2162
      @waynemansur2162 5 ปีที่แล้ว

      @@Shadowkhn Yes, heat rises, Sergey, until it fills the "envelope" which is the demonstration house. Once the envelope (attic) gets a lot of heat it then filters down through the insulation, through the drywall, and into the house. In conclusion, Larry in concept spoke properly...but perhaps might use different words next time

  • @jkileo
    @jkileo 11 ปีที่แล้ว +4

    Very nice demonstration, thank you, you made my decision easy

  • @pipersson9258
    @pipersson9258 5 ปีที่แล้ว

    *The real question is: How much actual Insulation is inside each bag of insulation? Learn to ignore the measurements, the alleged thicknesses, the alleged R-value, and the stated roll sizes. A quick and simple test is to put each bag on a scale, to weigh each bag in the factory and to sell by weight. Some bags (meaning some rolls) contain 85% air. All Spun Glass and Rockwool is 'springy; it increases in size when released from the bag, but the insulation WEIGHT remains the same. Rest assured 10" inches of insulation (including cellulose shredded paper insulation) does NOT contain 10" inches, but just 1 **-to-** 2" of material. In the factory its fluffed up with air by machines and you have natural fibre induced spring-back and height increases to consider. Its a billion dollar racket!*

    • @Deploracle
      @Deploracle 5 ปีที่แล้ว

      The air space between fibers ADDS to it's ability to insulate. I used to work for an annealing furnace manufacturer and they used a very airy product called "PyroBloc", 12" of the material kept 2000F on one side and cool to the touch on the other. In fact technology from PyroBloc were in the Space Shuttle heat shield tiles (also very airy).
      The material used isn't the insulator (PyroBloc was made by liquifying white sand and letting it pour in front of a high pressure air stream, which turned it to a cotton candy consistency. Sand is a poor insulator, but the fibers made from it is a great one.

    • @pipersson9258
      @pipersson9258 5 ปีที่แล้ว

      @@Deploracle ,@ Sadly, we have all fallen for that trick argument. So have millions of others who think heat can be trapped and held. Did you know that the Chinese fall down laughing if you tell them string-vests conserve heat, they have the answer in padded--sewn coats and padded jackets and wearing several layers of close-knit, closed-cell garments. How come we now have Fluffed Up Rolls of insulation (not the good old thick 1965 cardboard-y type) that took some cutting and when cut - cut clean like wood? How come I used to struggle to carry 2-bags upstairs to the attics, and now young girls can carry 4 bags, and big girls 6 -bags. The trapped air argument is obsolete. I see heat as liquid water, like steam, and if you have clay tiles each tile allows air to escape, Dupont cracked this problem with their Tyvek, it's just a pity-that its over-priced by 100%.

  • @johnjacobjinglehimerschmid3555
    @johnjacobjinglehimerschmid3555 5 ปีที่แล้ว

    So thermal transfer isn't a problem with dense packed cellulose? By thermal transfer I mean the same sense as when thinking of a 2x??? framing how it's R-Value is much lower.

  • @gerrylk9
    @gerrylk9 3 ปีที่แล้ว +1

    I came here for the music and stayed for 1 minute

  • @publicmail2
    @publicmail2 10 ปีที่แล้ว

    Cellulose has some serious short comings, like if you have a leak, and you will, fiberglass does not hold water, cellulose does. And then your ceiling is coming down. Cellulose is pushed so much because it cost the installers half the price. The only advantage is more R value per inch, and stops air movement.

    • @scottbickett6991
      @scottbickett6991 10 ปีที่แล้ว +1

      Sooooo its the insulation's fault if it gets wet? BTW if it gets wet it can completly DRY OUT. If it gets wet YOU HAVE A BIGGER PROBLEM!

    • @ralphinator2
      @ralphinator2 9 ปีที่แล้ว +2

      +A D "The only advantage is more R value per inch, and stops air movement." Durr, and the only advantage of an umbrella is it stops rain.

    • @larrymaloney877
      @larrymaloney877 9 ปีที่แล้ว +1

      +A D , you trying to be funny? You say the only advantage to cellulose is a higher R value and it stops air leakage..That's exactly what excellent insulation does. If you have serious water damage, that means the drywall, the furniture and most everything else is wet and ruined. I doubt anyone will recycle the fiberglass. Insurance pays for new drywall, paint, furniture, and insulation so why not get the best? Fiberglass doesn't hold water because it's a solid core material...which is why it has a poor R-value...It will grow mold. It will cause cancer. It will melt & the paper coating will burn and the melted fiberglass will give off gasses. As it burn =s out fo each wall cavity the fire spreads to the ceiling and attic. I would not install fiberglass if it were FREE!.

    • @scottbickett6991
      @scottbickett6991 9 ปีที่แล้ว

      +A D "HIGHER R value and stops air movement" ..WHAT MORE DO YOU WANT!! If FG doesnt "hold water" THEN WHERE DOES IT GO? it has to GO somewhere! AND if you get a lot of water in your attic/ cieling YOU HAVE BIGGER PROBLEMS than the insulation!! sheesh.

    • @ralphinator2
      @ralphinator2 9 ปีที่แล้ว

      scott bickett Don't forget "it cost the installers half the price". So besides being cheaper, working better, and being more ecological, no advantages really.

  • @FakeNewsHunter
    @FakeNewsHunter 5 ปีที่แล้ว

    4:48 the left side can hardly be filled up. And nobody knows if it is filled. I guess there will be many undiscovered gaps where no cellulose does its isolation job, because its simply not there. .

  • @HsingSun
    @HsingSun 4 ปีที่แล้ว

    Nice video! Cellulose look nasty, are they safe when you are in the attic?

  • @turboflush
    @turboflush 5 ปีที่แล้ว +1

    Apparently the cellulose also looses its chemicals over time. It also lays flat sooner than fiberglass.

  • @americanidle872
    @americanidle872 8 ปีที่แล้ว +1

    Just googled a bit of research. Cellulose is mold prone though.

    • @Strychn1n3
      @Strychn1n3 8 ปีที่แล้ว +6

      So you did "a bit of research" yet didn't watch the entire video where we explains that the cellulose is treated for mold prevention and shows the mold farm?

    • @allensanders4204
      @allensanders4204 5 ปีที่แล้ว +2

      I work on lots of old repo homes with both types of attic insulation. Matter of fact I was cutting moldy sheetrock out of a ceiling in a house yesterday. That house had pink Corning insulation batts layed between the ceiling trusses. Everywhere I cut out a 2 or 3 foot by 2 foot section of sheetrock that had mold in the paper top and bottom the fiberglass batt also had mold growing on the paper side touching the sheetrock. I rarely see moldy cellulose. A side note , I see much greater rodent damage in fiberglass batts than cellulose. Mice tunnel through fiberglass insulation like coal miners. If you have mice in your attic you will likely see evidence of snakes. Usually black snakes ( good climbers)which are not dangerous and they are good mouse catchers but who wants a 5 ft snake in their attic. Another observation is cellulose traps dust in the upper layers but fiberglass allows the dust to settle further down onto the top of the ceiling. If you live in rural areas with dirt/gravel roads the dust collected in your insulated attic will become an issue over time .

  • @jimdavidson5208
    @jimdavidson5208 8 ปีที่แล้ว

    Bad thing about cellulose and fiber glass is they settle over time. Reducing performance over that time. Advantage spray foam. Also cellulose and fiber glass are not air or moisture barriers. Advantage spray foam again. Closed cell foam all the way. Lastly which would you rather breathe in, fiber glass or foam? Advantage spray foam again.

    • @johnferradohomeenergyshiel1229
      @johnferradohomeenergyshiel1229 8 ปีที่แล้ว +1

      +jim davidson While what you say is true to a point, you're leaving out two very large issues: The cost of Closed Cell spray foam versus Cellulose, and the fact that closed cell is non-permeable. Why is that important? Because if you have a roof leak and seal the roof deck with Closed cell, you will never know your roof is leaking and it will irreparably harm the roof over time. Closed cell, because it's non-permeable, is fabulous in a crawlspace or basement. Open cell, which IS permeable, would be better suited for the roof deck as it will allow water to intrude and you can diagnose a roof leak. Lastly, Cellulose takes a long period time to settle, especially versus the all but useless Fiberglass. Other than that, you're right on.

    • @Lafue108
      @Lafue108 8 ปีที่แล้ว +2

      +jim davidson Yea, but spray foam offgasses a lot more than the other options, and is subject to field mixing issues that can really hurt indoor air quality.

    • @jimdavidson5208
      @jimdavidson5208 8 ปีที่แล้ว

      Foam only off-gasses till it cools. Less than one minute. After that there's nothing. There are no field mixing issues and spray foam never hurts air quality. Yes it can if you stick your nose by the FRESHLY sprayed foam, till it cools. How often do you do this? OK never. Spray foam of the closed cell variety is the highest performing insulation on the market period, end of story, message ends here. Fiberglass allows you to breathe that crap for the entire time it's in your home. Cellulose is better but still settles like fiberglass and loses it's R value. Money out the door. Foam stands tall, never settles, is moisture and an air barrier that performs superior to other old technology insulation.

    • @Lafue108
      @Lafue108 8 ปีที่แล้ว

      +jim davidson Not enough is known about spray foams for you to be making statements that it doesn't offgass after it cures. When you see a lot of reports of people with chemical sensitivities having problems after their home was sprayfoamed, it tends to suggest that it's not as inert as you think. Have you ever seen a sprayfoam job where they installed the passes to thick? The stuff never cures right and it smells fishy.

    • @jimdavidson5208
      @jimdavidson5208 8 ปีที่แล้ว

      Either poor product or over-sprayed install MIGHT cause this. Never heard of it though. Everything I've heard/read says once spray foam cools the gassing is done. Smell a styrofoam cup. No odor at all.

  • @DerrickFishes
    @DerrickFishes 3 ปีที่แล้ว

    How do they have the same r value when cellulose is that much better at insulating?

  • @dave6799
    @dave6799 4 ปีที่แล้ว

    any contractor recommendations in lake county IL?

  • @paulfenn940
    @paulfenn940 4 ปีที่แล้ว

    Super interesting and helpful!!

  • @tishvillalobos3255
    @tishvillalobos3255 7 ปีที่แล้ว

    Hi can you tell me if this is good for cold climate like Alaska. I want to build a small cabin can you advise

    • @lulolee5325
      @lulolee5325 5 ปีที่แล้ว

      It's illegal to build any "cabin" on your own! Your contractor will know all the requirements, your business only to take mortgage in a bank.

  • @frederickkwek3772
    @frederickkwek3772 7 ปีที่แล้ว +5

    The Fiber is not compacted compared to the cellular

  • @Joewalshe38
    @Joewalshe38 7 ปีที่แล้ว

    Clear and concise presentation, well delivered. Thanks

  • @kathleenscherban7433
    @kathleenscherban7433 9 ปีที่แล้ว

    What kind of fire retardant chemical is used. This may be as dangerous as spray foam. Please advise.

    • @larrymaloney877
      @larrymaloney877 9 ปีที่แล้ว

      +Kathleen Scherban , boric acid. It's also used for eye medication.

  • @Ddorini
    @Ddorini 7 ปีที่แล้ว

    Hi! I'm so interested in these cellulose materials! But, as you know cellulose are combustible! Do any one knows about how wcan avoid from easily burning out? Like adding flame resisting materials in it?

    • @Deploracle
      @Deploracle 5 ปีที่แล้ว +2

      Did you watch the video?