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.

Installing steel roofing over existing roofing materials is fairly simple. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Metal roofs can be installed over your existing roof without tearing off shingles provided local building codes allow it. This is by far the most common way to install a metal roof.

Use furring strips to build a slat board on the roof then mount the steel sheets to the slat board. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. 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. Manufacturers provide 30 year warranties on metal roofing products.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. 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. Metal roofing is also available in the form of shingles. A potential problem with this type of installation is trapped water vapor.

Metal roofing is resistant to fire rot and termites. You also could install a corrugated through fastened metal roofing product and probably not have issues. Screw fasten the purlins using fasteners directly screwed into the trusses or rafters. If you opt to put the metal roof atop current roof shingles it needs to be done in combination with a synthetic underlayment recommended.

Spacing of furring strips for metal roof when installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before.