Metal Roofing Directly On Plywood

Do you need plywood under metal roofing.

Metal roofing directly on plywood.

But it seems the condensation will affect the 2x4 strapping. 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. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Yes metal roofs are placed directly to the plywood over icynene insulated roof sheathing thats how i always had it done and warranteed.

How to apply metal roofing over plywood step 1. Repair any rotted sections of plywood before installing the metal panels. Inspect the plywood for damaged areas. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof.

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. 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.

Place the first screw. Sweep the plywood clean of all dirt and debris with a push broom. 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.