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Old Rubber Roof Torch Down - Should you Remove it or Install a New Rubber Roof over the existing?
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- Опубліковано 13 сер 2024
- The question always remains, what is the best thing to do? Should you remove an existing roof or should you install a new roof over the old one?
I have been installing Torch Down Rubber Roofs for over 35 years. In all my roofing years I have stripped a few roofs. It is almost never necessary to remove an existing flat roof.
here is a video where we install a Torch Down roof over gravel - • Flat Roof Installation...
• Installing a Torch Dow...
In this video, we installing a Torch Down over an existing Torch Down - • Torch Down Rubber roof...
I know what the law says. After 2 layers you should strip everything off. This law was not meant for flat roofs. It is meant for Shingle roofs that are nailed down. Shingles get spongy after 2 layers and the nails start to pull through.
My rule of thumb is, If an existing roof surface is in a relatively good condition, meaning no rotten substrate, where I can feel it as I walk on the surface, then there is no need to strip it.
So many flat roofs get destroyed that could have been used for the better.
Here is information on the materials we use for Torch Down - www.firestoneb...
We also use Karnak 81 Trowel for all the transition areas like on drip edges and around vent pipes - www.karnakcorp...
Indicators on a rubber roof that can help you decide the condition of the roof:
0:00 To strip an existing roof or to go over?
0:25 What to look for on a commercial roof
0:39 Determining what type of roof you have
1:00 Sign of Bubbles or air pockets
1:17 Tar is a sign of trouble
1:54 Tar on the perimeter edging
2:45 Why no reason to strip a Rubber Roof
3:18 Melting the New Rubber to existing
3:58 Cutting through 2 layers of roof
6:35 Patching the Roof with a Torch
Some questions need to answered.
1. How many roofs are on the building, weight could be an issue, modbits typically weight approximately 100 lbs per roll.
2. Is there is moisture in the existing system, between roofs, insulation, causing deterioration of decking ie. rotted wood, rusted metal decking, crumbling gyp. Any moisture trapped in the existing roof plies and insulation will continue to compromise the building envelope and put the structure at risk. You cannot roof over a wet substrate. A though investigation needs to be done with a number of roof cuts, a conversation with owner to determine what work has been done. Any and all information needs to be compiled before a decision is made
Thank you so much I watch all your video and you help me a lot and I done my flat roof myself soon I will send you some picture you are Master
Tear off the existing roof unless the homeowner can’t afford the tear off. You are so right, you can add a second layer but screw down dens deck. But I would prime the deck before putting cap over cap.
Thank you very much roof docYour videos are absolutely fantastic for the dyi’er flat roof.
Hot mop is the best choice
greetings I have been watching you a lot. What should I use SBS or APP bitumen torch down in Massachusetts?
thanks so much
IT deepends on the age on the membrane, how damage and dry it is. To old and dry. No question rip it off.
What is the sealant that works and how do you know what type of rubber roof it is? He said it was rubber and used heat to put it on. I have a1 q/2 pitched flat roof
Can I email you? It's 19 years old. Never leaked once . Hasd a gravel tar roof replacement in 2003. Wish you could come here and tell me what I need. I know I could trust you implicitly
. Give me the exact name and how yo order.
How do you torch down smooth rubberoid over metal T drip edge?? Thank you
Very good job corazon
I can't find anywhere whether it is possible to torch down a modified bitumen "mod bit" on top of an existing epdm that is failing.
Mine was done like this and it leaks even crazier
Cut back epdm perimeters and torch onto, however if epdm has blistered no longer stuck down must be removed , if decks good and epdm is still fully bonded then go over it
Exelente el trabajo felicidades
Mucha gracias
Why cut the corners on the patch? Thanks doc id come work for you but I live in canada ontario. I'll watch all your vids tho
Sbs bitumen is also a torchdown membrane same as app.
Torchdown means it's welded with flame to the surface. It's only 2types of mixtures sbs and app. :) and both are eather pil and stick ore torch down :)
Do you ever set fire to your backside?
lol not to my backside but to my shoes and legs, lot of burnt jeans
What you did was a expensive repair. That's not a new roof. Eventually they will have to tear off down to the decking. Don't listen to roofers . That can't set a ladder up properly. If they don't care about safety. Get them off of your property immediately. Because they probably don't have insurance. Because I have yet to see him comply with any OSHA safety regulation.
Please tell me your take on granulated peal and stick modify brand mule
I have used Mulehide and I like it. It works very good. You can find it at ABC Supply
@@FlatRoofDoctor I have a 100yr old 1800sq foot flat roof building and it has 7 old layers, I want to do a complete tear off, A roofer quoted a reasonable price with this product, should it be an option for me, I live in Chicago, your opinion on would you use this on a project my size.
Flat roof doctor said he can’t get it up I believe that
Sbs and app is both a torchdown roof. Sbs is more clean asphalt product then app Who has a plastic mixture in it. Still same system :)
thanks
I've got a 4 year old modified bitumen flat roof that is leaking near the drainbox. I've had roofers come and tell me that the seams were not properly sealed. It's possible to lift up the overlapping sheet using a finger in many places. They tell me that this is proof it was not properly seamed. Is it true? I don't know, every roofer seems to talk authoritatively including the one who installed my roof (he says the roof is properly installed!). Can the seams be "fixed"? Do I need to have another roof layer?
No, if you can pick up the seams, it's done incorrectly. I wouldn't even do torch down again or rubber. Scrape it off and start all over with something more reliable
@@ShyRage1 Yep, you're right. That's what I ended up having done this spring. Total roof ripout and replacement. I was the first homeowner to do that in 100+ years. They took out 6 layers of roof (bitumen, tar, and who knows what, all the way down to the first tin roof covering over the original deck boards). Replaced it with EPDM. Expensive. Hope I don't have to ever do that again!
@@spuriustadius5034 imma look that up. Is that something new?
@@ShyRage1 Look what up? EPDM? It's also known as a "rubber roof". Contrary to what flat roof "doctor" says, it's a perfectly fine roof covering as long as it's done right (just like almost any other type of roof).
If your installer used Base first then the cap sheet and if the installer lapped the seams offset so the base sheet seams do not go inline with the cap going in the same direction then even though the cap sheet seems don't seem like they're fully sealed it shouldn't be able to leak because the other theme that the cap is seamed to the base sheet the seams should be a foot to a foot and a half away from the other seam between the two layers of SBS torch on most likely leaking somewhere else like a drain or around a penetration water runs along the Wood Construction or steel construction under the roofing surface and leaks out at the easiest place on the ceiling side to tell where you're having leak on roof is where is the roof soft where is the roof beginning to Bubble how good are the seams around penetrations like wires coming through the roof rooftop units Plumbing stacks and gas lines
They told me at the roofing store if its 2 layers it has to be removed and there's already like 10 layers on my roof
Sure, that's what the book says.
And Thats also true. You have to think about the weigth and construction. If you have a roof that needs 100 rolls to seal it, well thats 4000kg with materials, and thats only one layer double it almost on 2 layers.
Over the top.. with 4mm torch on
lol Howdy Slim
You have just cut new felt really
You can't get it up
All I see is some shadey shit
You're putting old over new that old is shrunk so the new torch on will won't last as long as a complete new plus its fresh I bet you in a year it will start to blister
wtf do you mean " i don't recommend to strip down any roof".... there are literal LAWS that allow i believe a maximum of 3 layers.... so if you have 1 or 2 layers existing on the roof already you can add one more but if it's more, you HAVE TO strip down
whoever says lay it over. is a complete butcher. give up the tools and find a different profession. this guy is a total hack you should be sued and these videos taken into court. you shouldn't be on a roof. complete hack
Angry Trash talker that has nothing else to do. Pride is arrogant at its highest level. You must be surrounded by a lot of garbage. Because all you see when you wake up is garbage, then you will talk trash all day. Clean up around you, so you can feel better about life. Your name says "Greezy" that's a giveaway.
I went to see your channel, it is weed. That's why you talk like this. I should not have responded. You are a waste of time. Go and smoke more.
@@FlatRoofDoctor no, he's right. This is the worst. Scrape it off and start all over
@@FlatRoofDoctor Well said.
I was a union roofer for 36 years , don’t let the roof doctor anywhere near your roof, we call his work a butcher
And your already patching your new roof . The work on this roof doesn't look very clean.
Nope, we did a Torch Down over a mop down roof.