Metal Roof Over 2 Layers Of Shingles

Briefly i want to install metal shingle roof over two layers of old aspalt shingles on my cottage.

Metal roof over 2 layers of shingles.

Before you decide to install a metal roof over existing asphalt shingles you need to answer a number of important questions. Referencing section r907 3 of the 2006 international residential code book best answers this question it reads as follows. Usually this number is two meaning that if your roof already has two layers you won t have the option of installing a metal roof over shingles until you ve removed at least one of the layers. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Would it make sense to add foam insulation between old roof and new metal shingles to keep house cooler in a summer. A home with 2500 sq. Composition asphalt roofing steel roofing metal panels inc. This provides a couple of benefits.

Consequently they don t have the same ventilation advantages. Composition shingles are heavy. Metal roofing can be retro fitted over an existing the landfill impact of the composite tear off. Shingle condition also plays a role since a large number of missing deformed or curled shingles may narrow your options requiring you to use a steel shingle system rather than a standing seam.

However you ll want to check with your local building department before you make any decisions. There are really two ways to install a metal roof over a shingle roof. Other areas will allow you to re roof over two layers. The first one being that the new underlayment will act as a second line of defense in case water would to somehow get underneath the metal roof.

Can you put metal roof over shingles. The first way is to run new underlayment over the existing shingle roof completely covering the old roof. I am wondering if installing a metal roof over two metal over 2 layers of shingles 3 13 2009 within the roofing over existing roof discussion of the residential metal roofing forum. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

Of roof two layers deep may have over 15 000 lbs of roofing fetch content. Many metal roofing systems can be installed over 1 2 layers of existing asphalt shingles saving time labor and landfill costs. But some steel shingle manufacturers offer do it yourself systems that cost about the same as an installed asphalt roof. Otherwise you will need to remove the shingles.

Can you put metal roof over shingles. These systems aren t attached to a frame but instead install directly on the old roof. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles. Yes you can install a metal roof over shingles.