Metal Roof Installation Over Asphalt Shingles

Most codes allow only two layers of roofing before requiring a complete tear off.

Metal roof installation over asphalt shingles.

Yes you can install a metal roof over shingles. Depending on the condition of the existing roof battens may be necessary or beneficial. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. 3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof.

In most locations building codes allow a metal roof installation directly over an existing layer of asphalt shingles. 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. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Make sure roof is square.

You shouldn t attach the metal directly to the osb roofing deck. Can you put metal over shingles. You need to add furring strips over the top of the shingles so you have something to attach the metal panels to. Your metal roof warranty will be void by installing over asphalt shingles.

Metal roofing panels does it work to leave asphalt shingles under long metal panels. Use the right underlayment in all cases. You are using roofing underlayment and vented ridge cap to prevent moisture buildup. Both metal and shingle roofs are great options for your next roofing project.

Installing a new metal roof over an old shingled roof also affects bridger steel s warranties because the abrasions from the rocks on shingles can cause backside wear as the metal expands and contracts from both hot and cold weather. You may decide to install a metal roof over old asphalt shingle roof when. It s in compliance with your local building code. You have to in order to comply with local building codes.

After all you ll be making a significant and long term investment. It depends on the situation. Other issues include venting the eaves and the ridge. This is by far the most common way to install a metal roof.

However you ll want to check with your local building department before you make any decisions.