Metal Roof Over Asphalt Shingles

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

Metal roof over asphalt shingles.

Otherwise you will need to remove the shingles. Asphalt shingle roofing is a dominant material for residences. The low weight of metal roofing is one thing that encourages this. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. There is absolutely no reason to remove a structurally sound asphalt roof to install a metal roof other than to add to cost. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. However metal roofing is surging in popularity as more aesthetic options become available.

After all you ll be making a significant and long term investment. A steel roof is a lifetime investment lasting 50 years or more if it s a good one. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

However you ll want to check with your local building department before you make any decisions. 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. A steel roof is a lifetime investment lasting 50 years or more if it s a good one. On this forum from angie s list this person has a strong opinion in favor of metal over asphalt shingles.

Tens of thousands of metal roofs have been done this way with no problems. 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. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Metal roofing weighs less than one pound per square foot. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.

Yes you can install a metal roof over shingles. Both metal and shingle roofs are great options for your next roofing project. Things to know about metal over shingle roof problems.