How To Install Metal Roofing Over Asphalt Shingles

It provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow.

How to install metal roofing over asphalt shingles. Metal roofing sheets have to be installed one at a time. Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. However you ll want to check with your local building department before you make any decisions. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base.

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. Manufacturers provide 30 year warranties on metal roofing products. We get asked this question all the time. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.

Make sure roof is square. Place a sheet from top to bottom on a section of the roof. Installing steel roofing over existing roofing materials is fairly simple. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath. Use furring strips to build a slat board on the roof then mount the steel sheets to the slat board. Can i install a new metal roof over shingles.

Install metal roofing sheets. Metal roofing is resistant to fire rot and termites. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel. In a standing seam roof long single panels run vertically all the way from the eave to the ridge.