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.

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. Both metal and shingle roofs are great options for your next roofing project. Disadvantages of metal roofs. 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.

Otherwise you will need to remove the shingles. This method has its benefits as well. A steel roof is a lifetime investment lasting 50 years or more if it s a good one. Things to know about metal over shingle roof problems.

After all you ll be making a significant and long term investment. 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. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Advantages of metal roofs over shingles.

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