How To Install Metal Roofing Over Old Shingles
By laying metal roofing over the shingles of an existing roof you are protecting it from the weather and also from the effects of time.
How to install metal roofing over old shingles. These slats of wood run perpendicular to the metal roofing itself. Although the answer is technically no, you don’t have to remove the old roof, bridger steel’s team never recommends installing a new metal roof directly over an old roof. The purlins are screwed into the roof deck, and that depends on how the metal roofing brand has designed the panels to.
To vent the roof, holes are cut in the old roof (detail 1) above the soffit, which pulls air through the soffit vents underneath. The second way is to install 1×4 purlins over the shingles. Herein, can you put a metal roof over asbestos shingles?
However, the combined weight of asphalt shingles and metal roofing may require additional support in. Most buildings are designed to support the heaviest roofing systems. 1) remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof.
Now the second method usually involves installing the metal roof on top of the traditional shingle roof using battens and purlins. Do you have to remove shingles before installing a metal roof? This will provide ventilation while protecting your new roof from the abrasive shingles.
What is the best way to install a metal roof over shingles? Metal roofs also offer greater insulation during the colder months, especially when you install them over top of your old shingles. The metal roof must rely on the building’s framework for full support.
A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof. The most often used and popular method, if there are no problems with the wood underneath your existing shingles, is to place underlayment on top of the shingles, then screw the metal over top. The first way is to run new underlayment over the existing shingle roof, completely covering the old roof.
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