Is It Ok To Install Metal Roofing Over Shingles

This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.

Is it ok to install metal roofing over shingles.

Anatomy of a steel roof. If you choose to install metal roofing over shingles there are certain things you must keep in mind. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. Doesn t provide the flattest surface for the metal roofing to be installed over each course of shingles is about a 1 8 higher than the course just below it. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one.

After all you ll be making a significant and long term investment. Otherwise you will need to remove the shingles. 3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof. Both metal and shingle roofs are great options for your next roofing project.

Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. We get asked this question all the time. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

So the investment. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. We re going to break them down so you know what to look out for. Should old shingles be removed before new installation.

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. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. This method has its benefits as well.

Things to know about metal over shingle roof problems. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Address any existing roof leaks and replace rotten rafters or. Installation of metal roofing over shingles.

A steel roof is a lifetime investment lasting 50 years or more if it s a good one.