Metal Roof On House Over Shingles

The second way to install a metal roof over a shingle roof is with the use of purlins or battens.

Metal roof on house over 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. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof.

If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacturer has testing for their roofing panels and then the metal is installed to the purlins. 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. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it.

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. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Things to know about metal over shingle roof problems. Both metal and shingle roofs are great options for your next roofing project.

This method has its benefits as well. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Disadvantages of metal roofs.