Can I Put Two Layers Of Shingles On My Roof

Adding another layer of shingles seems like it would save you money by not having to pay your contractor to tear off your old roof. When it s time to replace your roof there are several factors that might lead your roofing professional to recommend adding shingles on top of your existing layers. The second layer of shingles will trap heat which can result in the decomposition of both roof layers.

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However there are good reasons it doesn t really cut down much on the amount of work.

Can i put two layers of shingles on my roof.

Having multiple layers of shingles is going to make your roof hotter because the heat gets trapped between the layers which could mean premature aging of the shingles. Be sure to check your local building codes to be sure you are in compliance if you plan on doing the work yourself. Cumming roofer provides free roofing inspections. A second layer is more difficult to install properly.

I won t speak to a haphazardly done job. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. Reroofing a home is something ambitious homeowners can do and you can save time and energy by installing the new shingles over the old ones. In fact the extra layer can reduce your roof s lifespan by up to 40.

That limit pertains to roofs with up to a 4 12 pitch. Two roof layers can work if the existing roof is in good condition but you shouldn t put more than two layers of shingles on your roof because of the weight. This will force you to replace your roof earlier than expected. Reasons why you should not add a second layer of shingles it will shorten the lifespan of your roof.

Benefits of adding multiple shingle layers. How many layers of shingles are allowed on a roof. This is especially true if you ve overlayed your new shingles on top of warped shingles. Most local communities will only allow two layers of shingles on a roof although there are some areas that do allow up to three layers.