Installing Metal Roof Panels Over 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.

Installing metal roof panels over shingles.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Yes you can install a metal roof over shingles. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base. Metal roofing sheets have to be installed one at a time.

However you ll want to check with your local building department before you make any decisions. The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacturer has testing for their roofing panels and then the metal is installed to the purlins. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Place a sheet from top to bottom on a section of the roof.

Install metal roofing sheets. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. This method has its benefits as well. 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.

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. 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. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.