How To Install Metal Roofing Over Shingles

However you ll want to check with your local building department before you make any decisions.

How to install metal roofing over shingles.

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. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. 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.

Use 1 1 4 inch. Make a slat board base on top of the shingles. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. A steel roof is a lifetime investment lasting 50 years or more if it s a good one.

You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof. Install the roofing screws vertically along each rib in the panel. Installing a metal roof on top of shingles can be done in three basic steps only 2 are required. What s involved in how to install metal roofing.

Install the metal edging. Winter heating costs may be reduced thanks to a double layer of insulation. Anatomy of a steel roof. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.

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. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. Install your metal edging around the perimeter of your roof. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.

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.