Furring Strips Under Metal Roof

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.

Furring strips under metal roof.

This should then be followed up with galvanized steel hat channel preferred method or 1 x 2 furring strips. How do you install furring strips on a metal roof. When installing a metal roof over an existing roof before installing the. Screw fasten the purlins using fasteners directly screwed into the trusses or rafters.

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. Corrugated roofing suntuf closure strip metal roofing polyethylene closure strips rolled furring strip galvalume gutter. 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. Use a tool belt that has a hammer loop to hold nails a measuring tape chalk line and a hammer when installing the wood.

Begin with the roof valleys. Outside closure strip for shelterguard metal roofing panels 4 bag model 6999231000. If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot. Create a chalk map.

Make sure that the wood strips are the right. But roofers can install a vented metal roof that eliminates this potential problem. 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. Inside closure strip foam sm rib roof accessory in black 4 pack model 98190.

Make chalk marks along the side of the valley about an inch fro the. Experienced do it yourselfers can use a nail gun with 8d nail clips instead of a hammer and nails. Place the primary furring strips. 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.