How To Install Furring Strips For Metal Roof

Metal roofs depend on thin strips of wood known as furring to allow air to circulate and prevent rot.

How to install furring strips for metal roof.

3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof. Twenty four inches is a common spacing of furring strips for a metal roof. Insert the foam closure strips into each end of every metal sheet. Let s take a look at the most common types of metal roofs for houses.

Furring strips are required if you plan to place a metal roof on top of existing shingles. 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. Secure the corrugated metal sheet using a drill and 3 inch deck screws to attach the metal to the furring strips. 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.

This is by far the most common way to install a metal roof. If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot. But roofers can install a vented metal roof that eliminates this potential problem. Correctly measure the spacing of furring strips for a metal roof to further decrease condensation.

Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. Insert the foam closure strips into the ends. 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. As long as the plywood under the shingle roof is in good condition this way can provide many benefits.

Use 3 inch white sheet metal screws with neoprene washers on the ridges in the metal sheeting until the roof is. They are compatible with many different kinds of synthetic underlayment.