Metal Roof Over Shingles Furring Strips

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

Metal roof over shingles furring strips.

Furring strips are required if you plan to place a metal roof on top of existing shingles. This is by far the most common way to install a metal roof. Let s take a look at the most common types of metal roofs for houses. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing.

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. 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. 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. Installing steel roofing over existing roofing materials is fairly simple.

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. Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available. Manufacturers provide 30 year warranties on metal roofing products. 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.

If trapped between the metal roofing and old roofing moisture can build up and cause mold and rot. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Use furring strips to build a slat board on the roof then mount the steel sheets to the slat board. They are compatible with many different kinds of synthetic underlayment.