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.

Metal roofing should serve both these purposes i m. Metal roofing requires a solid substrate. No the purposes of the plywood roof decking are to give lateral stability to the rafters trusses and create a walking surface. Rotted sagging areas in your roof s plywood decking should be replaced prior to installing metal panels in order to prevent costly repairs in the future.

Do you need plywood under metal roofing. It adds insulation waterproofing and structural support for the framing. Considering when to. It depends if you need the shed heated for any thing if not no you do not need a plywood layer.

Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels.