How To Install Metal Roofing Over Asphalt Shingles

Can i install a new metal roof over shingles.

How to install metal roofing over asphalt shingles.

Installation of metal roofing over shingles. On this forum from angie s list this person has a strong opinion in favor of metal over asphalt 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. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

This is by far the most common way to install a metal roof. We get asked this question all the time. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel. There is absolutely no reason to remove a structurally sound asphalt roof to install a metal roof other than to add to cost.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Otherwise you will need to remove the shingles. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. 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.

Address any existing roof leaks and replace rotten rafters or. Tens of thousands of metal roofs have been done this way with no problems. But first here are a few precautions about the underlying material. Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath.

If you choose to install metal roofing over shingles there are certain things you must keep in mind. We re going to break them down so you know what to look out for. Consult the guide for your shingle brand to determine the specific method of installation required to preserve the warranty. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.

As long as the plywood under the shingle roof is in good condition this way can provide many benefits.