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Window Insulation and Condensation
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- เผยแพร่เมื่อ 28 ม.ค. 2013
- In this video I describe using insulation on windows. Sometimes these are called insulated shutters. This can be very effective at stopping heat loss, but I describe things to watch for, and how condensation can occure.
One option is to use clear plexiglass inside vinyl frames adding magnetic strips to make a removable cost effective storm window for the inside of your windows. Add aluminum t-strips or angle strip(s) in the middle section of larger windows to help hold and secure larger window sections. This process also allows for being able to open the window when necessary and is useful for all seasons. This applies for all types of windows. Best to all in your projects.
plexiglass has a very low r value. now if you make an insulated glass unit (IGU) with several layers that might work.
Shane, good job. I'm sold on your hypothesis that a thick wall with cellulose is good to go. This video helps us understand how the elimination of the convective loop could eliminate the condensation that everyone fears.
The IECC code writers and Dr. Lstiburek , as you know, aren't yet to your level of enlightenment, and require some foam outsulation. Since I build in super dry Denver, I'm very unafraid of condensation on the inside of the sheathing.
Henry Blueskin is perfect for this application, as you stated in the other video, since it can breathe vapor but not air. Real plywood is also a great choice for durability.
Another phenomenon related to water vapor that you should address, even if you dismiss it, is that when vapor does condense, it shrinks to a volume 1700 times smaller than when it was vapor. The problem is when that vapor collapses, it pulls in more air with water vapor in it, causing more condensation, etc. This "suction effect" is not stopped by cellulose, and it doesn't occur inside foam.
Some vapor will get to the sheathing by diffusion, but it is probably too little to get this chain reaction started. In another video, you've shown that the sheathing is very dry on the inside, so I think you've proven the hypothesis in practice, if not in theory.
Great demonstration of why you have to air seal window insulation. I wonder what would happen if you cut out a large rectangle in your foam board insulation and installed 3m window film on both sides of the board. This would still allow light in and keep your air seal. The insulation value would drop, but I bet it would still be pretty good. Thanks again for a great video.
Walmart sells crystal clear vinyl sheeting in their fabric department. You can easily make frames with 1"x 2"'s and paint to match your walls. This is very inexpensive and looks very good. build frames to fit snugly inside your window sills (make a pull tab to remove). The vinyl comes in different thickness's and you will need a staple gun to attach to frames just as if your stretching canvas over a painting frame. When done it is nearly invisible and traps an amazing amount of thermal energy while not stopping any light and you will not have any more condensation problems again. Blessings! PS: to whom it concerns, feel free to message me if you need a step by step. I'll be happy to oblige!
Hi you still around to give step-by-step insulating vinyl windows 🙋🏽♀️
@@carmel-wayfinder5401 It's simple, measure your windows where you want the frame to go for example my kitchen window is a picture window with a 2 inch inner sill. You make the frame like a picture frame, cover with the vinyl, start stapling and go all the way around pulling it tight as you go. This is precisely the same as stretching canvas over a frame. You then set it in place. I add handles on either side when inserting a frame into the sill but you can make it big enough to go over the trim. Both work great. I hope that helps.
@@johnarizona3820 Thanks Very much.... So do you think of clear shower curtain will work
@@carmel-wayfinder5401 It may but it will cost more and be less durable unless you hit the dollar stores then who knows. Before purchasing check out vinyl by the yard and by thickness.
@@johnarizona3820 👍🏼🙉
in case if water does start to build up at the bottom treat the wooden frames of the window with a laquer treatment to water proof them .....prevents from rotting
Nice vid, thats why they say we should insulate the outside of the house, like a blanket...
At about 1:48 on the walk around, you can see some major gaps around the window frame.
I've used pop in half inch thick insulation panels overnights for 5 years, using duct tape around the perimeter, with a duct tape "tab" at the bottom to help me pull them out, and have not had wood rot problems. Condensation does occur on the coldest nights, and if the water starts to show any signs of damaging the wood, I just touch up the polyurethane to keep a barrier on the wood. The value of the comfort after dark in a room with insulated shutters is instantly tangible and I've been surprised at how well the insulation panels have held up. I also drop the venetion blinds down over the panels to help reduce any potential convection from occurring and to hide the panels.
Jo
VENTILATION IS THE ANSWER
We had a condensation problem in our last home, which had double pane windows in aluminum frames. When we built our new home, we used double pane vinyl framed windows. They haven't ever had a moisture issue at all, and the vinyl window frames don't carry the outside temperature directly into the inside of the house like the aluminum did. You didn't mention what your windows were made of, but if they are aluminum, you are fighting a much more difficult-to-win battle against energy loss.
Put the insulation on the cold side - it is very difficult to prevent moisture penetration from the warm areas.
good vid thanks
Fantastic ! This also just would show how moisture would also flow inside the walls also! if u had any little hole in vapour barrier which im sure we all have as i guess we would need alot heat inside to drive up the dew point. One thing i use is the 'Widow Insulator Kits' and i find the best are from 3M, Its a thin plastic film that u use with doubble back tape but be warned that tape is hard to get off so i leave them on all the time. Them Window kids works so very well especally for Skylights as so much convection. I wonder how that ridge insulation would be if it were cut perfictly from the outside?
Your window condensation is coming from the humidity being to high in your home. The temperature difference is do to poor insulation during the install. You will notice that if the temperature gets to cold outside, the poor insulation job will cause the condensation to freeze on the glass. You need to have whom ever installed them come back and insulate properly, and turn your humidifier down around 15-20 percent, or run a dehumidifier, and your problem will be solved.
see above for wally west
So just painters tape is enough to seal out the warm, humid air? Gotta try this this winter. I wonder if removable caulk would also work.
ww have this in kitchen and bathroom so bad pours down wall caising mold on base board help
Do dehumifers and air purfier both kill mold spores and mold I have mold in my bedroom and I use dehumifers and I have plug in air purfier also do they both work and are they both worth using
hi hey shane miller and greasy vrothers i have a major condensation provlem on the second floor of a house...how do u fix that other than vuying a dehumidifier i mean like fix it for real the way is suppose to and don't say lower the thermostat to 32 please thanks guys...
i use draughtexcluders on the openable Windows.
What kind of rigid insulation did you use
You have an opening under you window sill that has to be insulated and covered. This is a tremendous leak area.
Hi Richard, thanks for watching the video. You would be right if this home were built using the more common system of air-tight drywall and fiberglass insulation. However, my home uses a very different approach; more similar to what you find in passive house projects. My house tested out incredibly air-tight, you can see the video of the blower door test here: th-cam.com/video/yVK0R4C8FpE/w-d-xo.html Or you can check out some of my videos on how I made my air barrier on the exterior plane, not the interior, th-cam.com/video/Yw0JMvm7OCw/w-d-xo.html As you will be able to tell, the gap under my window sills is purely cosmetic and has zero effect on my homes energy performance. Thanks, David
Somewhere inside the wall in winter you will have a freeze point and therefore a dew point this is where the moisture will collect.
I agree that there is always a freezing point inside the wall when the outside temp is below freezing. When walls are insulated with dense-packed cellulose (like mine are) then there is no moisture accumulation. You would be right about a moisture problem with other insulation such as fiberglass. I have a video testing for moisture here: th-cam.com/video/05mgE_jdOr0/w-d-xo.html
Thanks for watching the videos.
put the insulation on the outside like this house:
th-cam.com/video/sZ0TqjHBDXE/w-d-xo.html
That's a great example. Thanks for sharing the video.
download above pdf, it goes over all windows treatments. Exterior Foam or interior foam is best. But windows can crack if you forget to rasei up interior foam during the day!
Look you need to stop breathing!..you breath out 4ltrs of water everyday..if your house is sealed where would it go?...you need to heat your house higher than the outside temperature..install expelair fans in every room ..have the fans extracting your moisture from breathing ,cooking ,washing, it is simple ,,take the moisture out of the building ,there will be no damp or mould or rot..condensation is stopped by good airflow,out of the building not in! it may seem weird to heat a building and open a window,but it will stop damp and moisture droplets forming....if you have ever camped out ,the inside of the tent is always wet overnight ..thats you breathing..stop it get fans to blow it out!
There is a "HRV" - Heat Recovery Ventilator. A tight house needs one of these units for the reasons you listed and to take the "stale" and or air from any out-gassing of construction materials out of the house. He covers it in this video - th-cam.com/video/7yZJiUUFzk0/w-d-xo.html
Your window condensation is coming from the humidity being to high in your home. The temperature difference is do to poor insulation during the install. You will notice that if the temperature gets to cold outside, the poor insulation job will cause the condensation to freeze on the glass. You need to have whom ever installed them come back and insulate properly, and turn your humidifier down around 15-20 percent, or run a dehumidifier, and your problem will be solved.
you obviously haven't viewed the earlier videos of how he insulated the home and made it air tight. walls 11 1/4 inch with packed cellulose staggered studs . Ceiling 22 to 30 inches packed cellulose . Ice and water wrap all exterior including roof and air gap then another deck on roof and air gap then siding on exterior walls. Has to have heat exchanger to vent house with fresh air. It still may have a high humidity I don't know but its definitely not even a chance there is poor insulation.