Furring Strips Under Metal Roof

Place the primary furring strips.

Furring strips under metal roof.

Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes. Corrugated roofing suntuf closure strip metal roofing polyethylene closure strips rolled furring strip galvalume gutter. Create a chalk map. Experienced do it yourselfers can use a nail gun with 8d nail clips instead of a hammer and nails.

This should then be followed up with galvanized steel hat channel preferred method or 1 x 2 furring strips. If talking metal shingles then putting them over existing asphalt shingles would be basically the same approach as putting on a second layer of asphalt shingles same issues same technique basically except they fasten a bit different and firring strips would generally not be used in my experience of seeing it done not that i would generally ever second layer with metal myself. If you opt to put the metal roof atop current roof shingles it needs to be done in combination with a synthetic underlayment recommended. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

Begin with the roof valleys. Screw fasten the purlins using fasteners directly screwed into the trusses or rafters. How do you install furring strips on a metal roof. Use a tool belt that has a hammer loop to hold nails a measuring tape chalk line and a hammer when installing the wood.

Gibraltar building products 3 ft. If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot. Inside closure strip foam sm rib roof accessory in black 4 pack model 98190. To make clear to readers if firring strips battens are used this should be located under the firring strips so the ventilation airspace is right under the metal where condensation is most likely to occur and to keep any roof boot flashing leakage running off over the top of the water barrier from contacting and corroding the underside of the roofing metal like it would if the water barrier were directly under the roofing though that is the case with roofing direct on sheathing without.

If talking strip metal roofing like standing or raised seam then i can t imaging getting an even final. 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. Make chalk marks along the side of the valley about an inch fro the. But roofers can install a vented metal roof that eliminates this potential problem.

When installing a metal roof over an existing roof before installing the.