Installing Metal Roof Panels Over Shingles

Most metal shingles will be attached to the roof using metal shingle.

Installing metal roof panels over shingles.

Place a sheet from top to bottom on a section of the roof. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Install metal roofing sheets. However you ll want to check with your local building department before you make any decisions.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. 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. Metal roofing sheets have to be installed one at a time. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base. Yes you can install a metal roof over shingles. This method has its benefits as well.

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. 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. 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.