I am considering changing my roof which is 28 years old. I was quoted a total new roof at $9K and a re-layering (putting second layer over the first one) at $6K.
Any comments on what is the downside for the re-layer option?
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2Most roofing manufacturers won’t provide warranty for overlaid roofs.– TysonCommented Jul 28, 2018 at 12:38
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1At least some regulatory bodies don't allow overlaying either.– isherwoodCommented Jul 28, 2018 at 13:38
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Could you clarify what your current roof is made of. The difference between slate and thatch lifetimes is quite marked!– Martin Bonner supports MonicaCommented Jul 28, 2018 at 18:29
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Normal flat shingles. My state and town allows second layer of normal shingles– DEEMCommented Jul 28, 2018 at 19:02
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1 Answer
Do not relayer. Here are some of the reasons.
- The added layer adds needless extra weight to the roof.
- Second and third layer shingles do not last as long as a new base layer.
- The added layer will never lay as flat as a base layer and creates more chances for pockets to form where water can backup under the shingles.
- Full rip off and replacement allows for inspection of roof boards / sheathing and replacement if necessary.
- Full replacement allows for much better re-do of the flashing. Relayering generally makes a total mess of the flashing trying to add new on top of old and inviting new leaks.
answered Jul 28, 2018 at 12:39
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1^^ this, especially because it's been almost 30 years since your roof deck has seen the light of day... Commented Jul 28, 2018 at 13:12
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2And all of this for only a modest increase in price over relayering. It's your roof --- don't go cheap on it. Commented Jul 28, 2018 at 13:42