Metal Roofing Directly On Plywood

How to apply metal roofing over plywood step 1.

Metal roofing directly on plywood.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Remove all unused vents pipes and protrusions. In a barn shop or other outbuilding you can attach your metal roof directly to the purlins. Considering when to.

Inspect the plywood for damaged areas. Do you need plywood under metal roofing. Repair any rotted sections of plywood before installing the metal panels. Yes metal roofs are placed directly to the plywood over icynene insulated roof sheathing thats how i always had it done and warranteed.

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. Also there are numerous better underlayment products as mentioned above including grace products and a host of others all better than felt. 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. Place the first screw.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. 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. Sweep the plywood clean of all dirt and debris with a push broom.