Do You Need Plywood Under Metal Siding

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

Do you need plywood under metal siding.

It adds insulation waterproofing and structural support for the framing. Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels. It depends if you need the shed heated for any thing if not no you do not need a plywood layer. Considering when to.

No the purposes of the plywood roof decking are to give lateral stability to the rafters trusses and create a walking surface. Metal roofing should serve both these purposes i m. In a barn shop or other outbuilding you can attach your metal roof directly to the purlins. Metal roofing requires a solid substrate.

Do you need plywood under metal roofing.