STEP by STEP How to do two ply Modified Bitumen Torch Down ROOFING INSTALLATION
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- เผยแพร่เมื่อ 20 ก.ค. 2024
- Bryan Ramirez explains a way to install modified bitumen torch down membrane. Watch this step by step video.
0:00 Importance of base sheet
0:23 How To Nail Down Base
0:35 Base Laps Explained
1:00 Base layout
1:27 Modified Bitumen Smooth Explained/Mini Smooth/1 Layer vs Two Layer System.
2:38 Why Blow off the Roof After the Base Install
3:13 How to Start Your First Layer of Modified Bitumen Torch Down Smooth.
3:36 Important Step How To Cut Your Corners
4:36 How Stagger Your Plies.
5:13 Where to Aim Your Torch.
5:52 Difference Between Smooth Modified Bitumen and Fiberglass Base Sheet.
6:50 How to Trim the Bottom Corner.
7:17 Torch Method
9:05 Edge Metal Detail
9:54 Final
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#TorchDown - แนวปฏิบัติและการใช้ชีวิต
Long lasting high quality roof system ! Cold weather rain, ice, and snow proof ! Heavy monsoon winds and rain weather proof ! Thx for the bitumen roof build up video RF
Been scanning through loads of flat roofing vids and yours is the only one I’ve found that’s remotely correct. Apart from doing the laps at the end I can’t fault anything else. Even down to the 45° cuts in the laps. 👍🏼
I mainly did this video for beginners. It’s an old vid. Just so people can learn without being afraid. Thank you!
@@roofingfanatics4775 ye I get that. Well ya obviously doing well it’s crazy how many people don’t know how to put a roof down but say their way is right. Best of luck for the future from the uk.
Good old school roofing right there. Modified is a good roofing system. Nice work!
Thank you! I Learned from old school roofers!
Thank you.
Beautiful craftsmanship and clear and precise information.
Thank you!
You’re right brother 😊 keep it up the good work that you’re doing.
great work! Nice tie in to the pitched part of the roof
Thanks!
Thanks alot bruh i apreciate your content i was placed as a roofer and immediately was placed as a foreman but i believe i have alot to learn so everyday is always a learning expierience and all your videos have helped me out alot. So thanks bro
I appreciate your information.. Learning a lot here.
Thank you that is what it’s for.
Excellent video!
Real nice thanks for taking the time.
Thank you! I’ll be uploading more soon!
great vid jack
Thanks for the instruction. And I like that roller. It makes sense to use a roller.
Yes Sir, that is one of my favorite tools. Thank you for your feedback .
@@roofingfanatics4775 hey buddy do you do work in lancaster ca ??
Un buen trabajo mi amigo,felicitaciones, y gracias por compartir tu experiencia, Dios te bendiga.
Gracias, igualmente. Toda la gloria a dios porque me ha dado conocimiento.
But I weld the whole roll at once saves time rather than having to go back and torch the laps get a pull stick stand on the opposite side walk backwards and torch
Nice 👍🏼
Great info. I wish your company did work in Lexington, KY.
Nice job
Thank you!
Very good
You do it the right way good for you not a lot of roofers do we’re the good ones
Thank You for your feedback!
Great video, thank you. Getting ready to do my commerical property to reduce cost. It just blow me away, when the material is only two tenth of the total contractor estimate. Three long term objective is to get lots of moderately priced jobs, and not just one high price job. Roofers contractors will be losing lots of money and running out of work.
Yes, we always recommend getting three estimates. Very few contractors will give you an itemized quote.
Great information.. thanks… btw could you place a peel n stick base over an epdm roof and then burn a cap sheet over that or do you still need the fiber liner too
Hello, thank you for the question. It is always best to follow manufacturer's specifications. You can install a peel and stick base if it has fiberglass so it won't burn. I would ask the rep of the product you are installing. You can get this information from your supplier. Just ask if you can have a sales reps number so you can follow their specs. The fiberglass base is mostly to protect the wood from burring and allows for expanding and contracting. You can install base on almost any nailable surface.
Only around the edges when ur putting drip edge , so happy this guy never did my roof 😂
Crazy how you guys do it in US . We use torch on sbs in uk but we use a roll bar , eg roll out felt to length ,cut , wrap it and roll it back with steel tube inside. We then heat it in the front contact point and roll it out with your foot as we continously heat, by putting the right pressure on the roll and even speed we get a perfect 6mm bead out of roll I can personally lay 150 m squared a day give it ago
I know some roofers that use Modified SBS. It is interesting how many different ways there is to torch. Some roofers stand on the roll and some pull. I generally like to torch the whole roll. However, for the sake of the video it was easier to explain this way for people who are learning to control their flame.
We used to do hot mop owned Roofmaster kettles know touchdown I've done same start ply with 1/2 to stagger seams great work young man I'm retired got 35 plus years Roofing commercial/Residential/ government jobs what city you located
Hello Robert,
Thank you for reaching out. I appreciate your comment. We located in San Diego County.
@@roofingfanatics4775 I know that area I worked O.C to ventura keep grinding roofing is a great living once you establish a great crews
How do you do an inside corner? Mine transitions into the siding. What do you run up on the vertical surface? All 3 layers? Then compression bar? Do you Mount the compression bar underneath the siding on the sheathing if you're redoing the siding anyways or does it have to be on top of the siding? I'm guessing you use OSI quad?
Where are you located? Do you give quotes in Santa Clarita? I have a 29x18 patio I need covered ASAP. Do you use CDX or OSB plywood? What grade of fiberglass do you use?
Use a heavy duty four-inch steel roller with a wand handle. This is a two person job, one heats it up while the other one rolls the seam to push out the bleed out. But truthfully we use a 25 gallon propane bottle. Then we use a dragon wagon torch which does the entire sheet at once. Plus you get your proper bleed out.
Leister makes some pretty cool robots as well. I need to get me one of them dragon wagons tho. Thank you for the feedback!
You have a LOT to learn!
Never stop learning
What is the purpose of the "smooth" layer. I can see that it adds to overall thickness, but once you "lose" the top layer, the smooth layer wouldn't provide any waterproofing without the top layer--or would it?
Can you do this to an rv
💙
I have a 2 ply flat roof and rain water is getting trapped between the layers.
How do you personally determine wether to use a single or double ply torch system? Also what are the benefits of one over the other, I’m assuming the double ply lasts longer and possibly has better insulation values?
Hello Precision Roofing,
Great Question, I personally determine one over the other if there is a living space or interior space being used:
if there is living space or interior space being used i always will go double layer of Modified Bitumen with a layer of nailed down fiberglass base sheet.
If it is just a outside patio covering or a shed I will install a single layer Modified Bitumen, a layer of nail down fiberglass base sheet with mini smooth torched underneath the drip edge metal and underneath penetrations.
Benefits of going Two Layers.
Thicker membrane that will hold up against HVAC units having to get serviced and accidents happening such as drills dropping and causing a hole.
Will hold up against any nails back outs from expanding and contracting of the wood deck. sometimes nails will back out of an old structure or home.
Last Longer
better welds in-between plies. For example your are welding directly over modified bitumen torch down as opposed to base.
I hope this helps.
I already have an old modified bitumen flat roof. I want to install another layer of modified bitumen on top of the old roof. Can I just put a layer of that sticky black adhering membrane to the old modified bitumen and then torch down a layer of granulated modified bitumen? Thanks!
Hello Christopher, great question! You can install a layer of fiberglass base sheet over the existing using metal cap nails. Then you can install modified bitumen smooth or granulated over the base for better adhesion. I do not recommend applying torch directly over existing unless it is pure smooth modified bitumen.the granules and dirt wont allow the new layer to adhere as good. It is always best practice to remove the layer to check the deck for any dry rot. Here in San Diego Local Building Codes allow for 2 layers at most. Best places to get these materials are roofing supply yards like ABC roofing Supply
@@roofingfanatics4775 Thanks for your detailed explanation. I have a couple places that I had put 2 coats of Henry 100% silicone coating. I wonder if I can put a self-stick asphalt layer over the silicone and torch a layer of granulated bitumen on the top since asphalt doesn't stick to silicone?
@@Chris-uh7nm A peel and stick membrane will not stick to silicone. The only material that will stick to silicone is silicone. If you would like to install a layer of modified bitumen over existing, you can definitely nail down a fiberglass base directly over the roof. The base is nailed so it does not have to stick to the silicone. once you nail down a layer of fiberglass base the new modified bitumen will stick to the fiberglass base sheet no problem. You will also need to break off all the collars around vent pipes and trim the old drip edge flashing and dispose. They sell a mini smooth version of the modified bitumen torch down so you can sandwich the drip edge metal and flashings. You can get all this material at a roofing supply yard. with these terms i am using they should be able to help you out.
@@roofingfanatics4775 That's what I thought. Thanks.
Do you know why you couldn't do modified bitumen on this whole roof, no shingles?
How steep of a roof can you use this on?
Base, mini around parameter, proper metal for situation + primer top, mastic joints, 1/2 fire board over base up to the mini cover field (also not a "ply") then 1st ply smooth entire service, flashings, drains if any (special details there) mastic bottom primer top, custom smooth over flashings, drains....then 2nd ply granular or 2nd smooth for 3ply systems ie uv coating. Stay thirsty bro, Steeper the better;)
I wish! That is a badass system. It’s hard to compete out here to install that system! I have to explain why I am too high compared to other contractors when they are selling a “two layer system” that consist on fiberglass base and a granulated roll. No mini no primer etc. how much per square on or about when you install that system on a 8-10 square roof if you don’t mind me asking?
@@roofingfanatics4775 left vm
At minute 5:58, you tried to differentiate the fiberglass and the "smooth"? I didn't quite get the name of the adhering black layer you called "smooth (?)" Can you spell for me what's the name of that sticky black layer? Thanks!
The smooth is a pure form of Modified Bitumen Torch Down. There are brands such as Apex Or Dibiten that manufacture smooth. Fiberglass base sheet is a base layer that prevents the torch from burning the wood and attaching the system to the deck. A manufacturer that make this product is GAF it is called Tri ply #75 i hope this helps?
@@roofingfanatics4775 Thanks so much. It's very helpful.
Ur supposed to ad primer before application of base coat so it will adhere to the decking
I applied a nail down base. It doesn’t need primer. I only have to apply primer to non asphalt based materials such as flashing and cement walls
Where's your location. I need ur help to remodel my house like this
What brand of bitumen rolls are you using?
I like to Use John Manville Dibiten.
How much would this cost for 1400 square feet roof? Do you work in Jacksonville, FL?
Hello William,
Great question! Unfortunately we do not work in Jacksonville, FL
We are a Southern California Based Roofing Company.
1400 square foot roof depending on the details can cost $11,200-$8,400 for two layers of modified bitumen with a 20 year limited warranty from manufacturer and a 10 year workmanship warranty.
I hope this helps. The price might be different in Florida.
I recommend getting 3 quotes
1 from local roofing company via Google search
1 from people you see on TV/vans in your area. They might be pricey but you can see what they have to offer.
And 1 from a recommendation from a friend
Stay away from roofing companies outside your city. You want to have a roofing company that is able to stand behind their work.
Cutting a 45 so you don’t have a t lap is the way the company that makes the mod. Bit. Say to lap end joints so your doing the best way possible.
Base is also a slip sheet to allow expansion and contraction of the roof.
Yeah except it is nailed down.
You guys don't have peel and stick?
Yes, we do have peel and stick. However, this is a torch down system instructional video. We usually use peel and stick for valleys and eaves for tile, shingles or the entire roof for metal. i could make a video of those processes soon.
@@roofingfanatics4775 why not use peel and stick ice and water on whole roof 4 shingles
@@Brandon-no3vc Here in California you cannot install shingles on a slop lower than 2/12. Manufacturer's will also not warranty the system. Also here in California even if you have the property owner sign a waiver stating that you are not responsible for any leaks. You will still be liable for damages if a leak would occur because your are the licensed contractor. You are responsible to help teach the property owner what they need. Be careful when you install shingles over peel and stick for this reason although it may work to prevent leaks. Even though it is a self sealing membrane the trapped moisture can shorten the life of the shingles. Check with local building codes or Manufacturers specs to see if they warranty on slopes lower than 2/12.
@@roofingfanatics4775 you wouldn't install shingles on anything less then a 2 12 anywhere in the world
But I'm saying anything over a 312 why not use ice and water on the whole entire roof
@@Brandon-no3vc I’ve only done that twice for low slope metal. I don’t like the idea of peel and stick over plywood because I have uncovered a roof that had peel and stick. It was super hard to take off. I wouldn’t want to do that to another contractor in the future. I also think that it doesn’t allow the wood structure to breathe fully even with vents. With expanding and contracting I feel like it will fail as everything else does with time. Felt paper can expand and contract better with wood because it is nailed. I feel like peel and stick will crack at the seams of the plywood because of constant expanding and contracting. That is just a theory of mine.
No peel stick???
Yes, we do have peel and stick. However, this is a torch down system instructional video. We usually use peel and stick for valleys and eaves for tile, shingles or the entire roof for metal. i could make a video of those processes soon.
@@roofingfanatics4775 looks like vb is meant for hot tar.
@@colinmintuck3297 This is a hot system. The asphalt is on the back of the roll and it melts like hot tar. The base helps prevent the wood deck from burning and also attaches the torch onto the deck.
Why not use protection board/blackboard
Hello Zachery,
Protection Board/black board? I haven't used that on a torch down app system. Is there a product name or manufacturer's product name? I'll look into it.
I usually install ISO as insulation.
I am open to options. Fiberglass base works well. I have never had a problem with it. I just want to see what advantages the product you use have over the fiberglass base.
Don't know why you go back on your base laps do it all at once
Either way is fine. As long as it doesn’t leak.
@@roofingfanatics4775 but it may not be continuous and cause blisters
@@tylesveque2373 that goes for both. I see when roofers aren’t continuous when they torch the full roll and the lap doesn’t weld. The lap may fishmouth
@@roofingfanatics4775 run it a quarter inch onto the granuals when you set it in and blast it have the man with the roller following you til you get used to your heat then eventually you won't need nobody to follow
@@tylesveque2373 I’ll try that next time. I just don’t like the risk of it getting too hot and having my guy leave a shoe print on the finished product. I understand you can put granules but I do a lot of residential so the granulated layer needs to come out nice. On a bigger roof I can be consistent enough to do the full roll.
You don't double the metal with a 13 before you cap
I double the whole roof then the metal then the cap
Your tea laps crossover is called a step down.
In San Diego, I hear 45 or dog ear. Interesting, it’s crazy how there are different languages in roofing.
If this guy show up at your house fire him haha
I have a new guy that and he insists that the less metal caps the better since they can ‘raise up from the heat’ I said no we cap down just like roofing paper that way the torch don’t blow the paper up letting the fire get to the wood causing a fire and that those button caps help how the roof down since the top is torched to the base. I said what holds that base THE CAPS! I told him you might as well not cap it and just torch it down let the wind come and see what happens. There’s more to the story but I was taught Bain down accordingly heat up the base then the roll then roll and step. This guy torches the rubber so hot when it’s all done it’s looks like drag strip burn box. There’s no nice finish and looks like shit.
not a 2 ply, what
just torch the whole roll bruh
Okay I will
h9w dud tou cut the smoth roll and alos fo you have videos on how to do the details on skylight curbs with 2 layer system?
You guys really dont know how to Torch ..
So wrong. Why not use a fast and stick or protector board?
not wrong. Peel and stick is just another option for these flat roofs. Torchdown is much more reliable than peel and stick.
@@JoseFlores-qn3us fast and stick, is not a peel and stick. It's a 180 base sheet, that gets screwed down on. Google it. Your wah is not approved by any manufacturer for wind uplifting.
But what do I know. I'm only 20 year roofer, who's a red seal roofer, Owns a company that dose inspected roofs ie.... warehouse ,hotels, etc haha.
@@MrRhyno420 how is wind going to lift those plus, there will be metal edging . I did roofing for 30 yrs. And this way is the right way.
@Edgar Baring go look up the winf up lift. You are doing a single-ply roofing. It will last 7 years and no longer. You my friend are making roofers look bad. I have been Roofing for 22 years I'm a red seal roofer. I do jobs that are 650 plus sq. I estimate them I spec then and I help do them. Come to b.c I'll show you how to roof the right away
This is so wrong
Nailing sanded base ? Brother use protection board like u should be . That's vapour barrier basically if your torching . Nailing it ? Might as well put 200 more holes lol u should be fired
Why do you install cheap materials. Have a little more pride in your work. Black diamond adheres to the roof to prevent wind from getting underneath.
Nothing cheap about the way he did it.
Butchers
Really really bad !!!
So wrong
Not as bad as the roof doctor lol
@@johnbernacki6155
Yeah he is brutal and it's hilarious as he himself thinks that he's top notch
do you nail the edge of base where edmadwoukd cover it
Don't mean to correct you but that's not why you cut a pig ear.. you cut it to avoid the built up (double layer) on the lap. The bottom of the 45° should meet the next lap. PERIOD