Metal Roof Over Shingles Without Furring Strips

Steel roofing offers many benefits over slate tiles or asphalt shingles.

Metal roof over shingles without furring strips.

A potential problem with this type of installation is trapped water vapor. 3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. While shingle removal is the preferred route tear off is messy and raises the cost of the job.

Installing steel roofing over existing roofing materials is fairly simple. Use furring strips to build a slat board on the roof then mount the steel sheets to the slat board. Metal roofing is resistant to fire rot and termites. This is by far the most common way to install a metal roof.

As long as the plywood under the shingle roof is in good condition this way can provide many benefits. You also could install a corrugated through fastened metal roofing product and probably not have issues. Manufacturers provide 30 year warranties on metal roofing products. Metal roofs can be installed over your existing roof without tearing off shingles provided local building codes allow it.

Metal roofing is also available in the form of shingles. Screw fasten the purlins using fasteners directly screwed into the trusses or rafters. If your home s existing shingles are pretty curled you could install a textured metal roof such as a metal shingle shake or tile directly over the curled shingles along with underlayment. If talking strip metal roofing like standing or raised seam then i can t imaging getting an even final surface or proper fastening without firring strips not only because putting the metal right on the shingles gives no way to level out the uneveness of the old shingles but also the underlying shingloes and underlayment will get awful hot.

If you opt to put the metal roof atop current roof shingles it needs to be done in combination with a synthetic underlayment recommended.