Metal Roofing Directly On Plywood

Install the first metal panel on the low end of the roof square to the eave.

Metal roofing directly on plywood.

Since your subroof will be waterproof well drained and airtight this will be a cost effective solution to build your roof saving the cost of plywood. Work toward the ridge. But it seems the condensation will affect the 2x4 strapping. In reading online it seems wise to install a vapor barrier over the plywood to prevent condensation from getting adsorbed into the plywood from the steel roof.

Can i install the metal roof over the ice shield or do i need the 1 x 4 battens every 2 feet as well it s a low slope roof thus the ice shield for extra protection. However you need to carefully inspect the plywood to ensure it is safe to use and you must use the proper materials. Add purlins on top of this for venting and drainage then add horizontal purlins to mount the metal roof to. Make sure that you or the roofing company you hire uses the proper plywood protection and follows the correct installation steps to offer full protection to your home.

To secure it measure it roll it out over the plywood cut it to the dimensions of the roof with a roofing or utility knife and finally hammer it securely to the plywood with 1 2 inch roofing nails. Also there are numerous better underlayment products as mentioned above including grace products and a host of others all better than felt. Use the reinforced solitex mento plus roof underlayment on top of your rafters. This will also ensure the longevity of your investment.

I was planning on putting plywood over the rafters and cross the rafters with a 2 x4 every 16 to secure the metal roof to. Overlap the edge of the roof by 1 inch. Begin on the left side of the roof working to the right. Hi todd i have a pole barn design structure that had been turned into a livable dwelling with cathedral ceilings using rigid foam between the metal roof and the ceiling sheetrock i am redoing this and putting a decking down with tyvek protec 200 and then reattaching the metal roof and adding circular pest resistant soffit vents at the end rafters of the roof between purlins for ventilation.

On top of this underlayment goes a slip which protects the material from tearing as the metal roof expands and contracts with changing weather. You can install metal roofing over plywood. I have removed all the old shingles from the roof boards not plywood the roof is in great shape and have installed an ice shield over the roof. Although it may seem counterintuitive metal roofing can be attached directly to your building s roofing structure without the need and expense of plywood sheeting.

Secure the metal panel to the deck by drilling 1 1 2 inch galvanized metal screws through the peak of the rib in 12 inch to 16 inch intervals.