Plywood For Metal Roof

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

Plywood for metal roof.

It can withstand moisture for a brief period of time but may become warped and delaminated with consistent exposure to the elements. To secure it measure it roll it out over the plywood cut it to the dimensions of the roof with a roofing or utility knife and finally hammer it securely to the plywood with 1 2 inch roofing nails. Overall plywood is a little bit better for roofing. While metal roofing doesn t require plywood underlayment there are circumstances in which you may wish to install plywood to anticipate future roofing needs or to offer additional soundproofing.

An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. On top of this underlayment goes a slip which protects the material from tearing as the metal roof expands and contracts with changing weather. That s considered to be the minimum. Metal roofing requires a solid substrate.

It will support roof. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Even though the wood is porous it is more natural and it can dry quickly.

This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load. Let s take a look at the most common types of metal roofs for houses. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

Cdx plywood is a construction grade type of plywood that is designed for exposure to the elements. Most construction sites will consider the use of either osb or plywood for the roof. 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. When the roofing material dries quicker it can be used to make sure that the roof will stay firm for a longer time.