How To Install Metal Roofing Over Shingles

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

How to install metal roofing over shingles. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. A metal roof reduces cooling costs during the summer months because it can reflect the sun s rays. Use 1 1 4 inch.

Yes you can install a metal roof over 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. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. How to install a metal roof over shingles.

Install your metal edging around the perimeter of your roof. Install the metal edging. It s the simplest and fastest way to install a metal roof. Install the roofing screws vertically along each rib in the panel.

You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. What s involved in how to install metal roofing.

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. Install metal panels or shingles align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Installing a metal roof on top of shingles can be done in three basic steps only 2 are required. However you ll want to check with your local building department before you make any decisions.

Anatomy of a steel roof.