Metal Roof Installation Over Asphalt Shingles

Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality.

Metal roof installation over asphalt shingles.

Otherwise you will need to remove the shingles. A steel roof is a lifetime investment lasting 50 years or more if it s a good one. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. A steel roof is a lifetime investment lasting 50 years or more if it s a good one.

Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. Yes you can install a new metal roof over the top of an existing asphalt shingle roof provided there are not too many layers. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

Unless building codes require it there is usually no need to tear off the old roof. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. They can either strip off the old roof and replace it with a new asphalt roof or they can install metal roofing over the existing asphalt shingles. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

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. Make sure roof is square. 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. The low weight of metal roofing is one thing that encourages this.

However you ll want to check with your local building department before you make any decisions. Yes you can install a metal roof over shingles.