Metal Roof On Plywood Decking

Most metal roofs will also require underlayment as well as a slip sheet.

Metal roof on plywood decking.

Laid with staggered joints. How to install metal roofing over plywood inspect your plywood. In the process of constructing a roof there are typically two different roof decking materials. This component is essential in both metal roofing and traditional asphalt shingle roofing.

Plywood boards used for the deck should be. If you re a contractor this is no news to you. 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. 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.

The contractor can choose an oriented standard board osb or plywood to create the decking of the roof. I m in the process of installing a metal roof over an outside deck. This decking is not recommended for hot melt or cold applied liquid systems. Double nailed at each joist.

Plywood used for roof decks is generally 18mm thick but it is possible to specify a minimum 15 mm if the supporting structure is more closely spaced. Inspect the plywood for damaged areas. Remove all unused vents pipes and protrusions. Plywood for a roof deck should be of marine grade and suitable for external use to bs en 636 or a bond class 2 or better complying with bs en 314 check.

Repair any rotted sections of plywood before installing the metal panels. Applying the underlayment and the slip sheet. A minimum thickness of 18mm these will be able to span up to 600mm. How to apply metal roofing over plywood step 1.

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. After the original roofing is removed what you will want to do first is look for bad pieces of. Our new smooth series cellular deck offers a blemish free beam to pan rivet. As long as the interior of your roof is protected from moisture accumulation underlayment is not required though homeowners planning to insulate their house heavily may choose to install plywood to protect their investment.

My rafters are in place and now i m getting ready to purchase and install my flashing and sheathing.