Furring Strips Under Metal Roof

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

Furring strips under metal roof. Some manufacturers want to see firring strips commonly 1x3 or 1x4 running up and down the roof supporting the center of the flat part of the panels not uslaly called for under the ribs because you are not supposed to step there i have seen 1x2 or 1x3 s called out for at the third points of the flat part the web on wider panel roofing. Screw fasten the purlins using fasteners directly screwed into the trusses or rafters. Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. They are compatible with many different kinds of synthetic underlayment.

If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Corrugated roofing suntuf closure strip metal roofing polyethylene closure strips rolled furring strip galvalume gutter. Furring strips are required if you plan to place a metal roof on top of existing shingles. If you hire a contractor they can explain all of this to you.

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. 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. This should then be followed up with galvanized steel hat channel preferred method or 1 x 2 furring strips. Or installing the new metal roofing over furring strips 1 x 3s or similar will raise the metal and provide a ventilating air pocket between layers.

Outside closure strip for shelterguard metal roofing panels 4 bag model 6999231000. For those that are going it alone it is a good idea to get in contact with a roofing expert first. But roofers can install a vented metal roof that eliminates this potential problem. If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot.