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Old 07-25-2007, 11:49 AM   #1
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Torch Down Over Existing?


Existing roof is Ruberoid Torch smooth installed about 15 years ago. Never was coated. Roof is in reasonably good shape for its age, which is surprising.
Any concerns with putting new torchdown over the existing roof?
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Old 07-25-2007, 12:24 PM   #2
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Torch Down Over Existing?


That is probably the best scenario to have. Be sure to be safer than usual, because the additional bitumen can heat up excessively upon reroofing it.

All flashing details remain just as critical as during the initial installation process.

Ed

P.S. Try to avoid running the seams exactly on top of the previous initial roofs seams. The humps will be more exaggerated and tend to slow down the water drainage.
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Old 07-25-2007, 03:11 PM   #3
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Torch Down Over Existing?


Thanks for the reply, Ed. That's the kind of info I was looking for.

[QUOTE=Ed the Roofer;54488]That is probably the best scenario to have. Be sure to be safer than usual, because the additional bitumen can heat up excessively upon reroofing it.

OK. Would you expand on this for me please?
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Old 07-25-2007, 08:03 PM   #4
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Torch Down Over Existing?


It can make a real good roof in this case.
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Old 08-01-2007, 10:45 PM   #5
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Torch Down Over Existing?


it`ll work good,beware the flame,and keep an extinguisher handy if you`re not experienced(or even if you are)
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Old 08-04-2007, 10:51 AM   #6
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Torch Down Over Existing?


Is it wrinkled or buckling? Is it taking water? Are the flashings still secure? Is the substrate in a roofable condition? Are you going to use a base sheet? What method of attachment is to be used?

Can you post any pictures for us? We like pictures.
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