How To Install Metal Roofing Over Shingle Roof

The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

How to install metal roofing over shingle roof.

Installing metal roofing over shingles is the best solution. 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. 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.

The low weight of metal roofing is one thing that encourages this. Use 1 1 4 inch. How to install a metal roof over shingles. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh.

Make a slat board base on top of the shingles. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Install your metal edging around the perimeter of your roof. The metal used for the roof can be tin copper aluminum or steel.

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 terms of performance many homeowners choose a steel roof making it the most popular option when it comes to creating a metal roof over existing shingles.