Plywood Or Decking For Roof

Severe weather 1 2 in common douglas fir plywood sheathing application as 4 x 8.

Plywood or decking for roof.

It adds proven performance and durability to new homes room additions and renovations. When it comes to choosing what kind of plywood you need for the roof it is important to understand the basic categories that you can choose from. It is an excellent choice for light frame wall and roof assemblies in weather protected applications. Unfortunately because the roof sheathing isn t normally visible damage can go unnoticed by homeowners.

The minimum thickness of plywood used for roofing is 3 8 th of an inch. There are three types of wood roof decks. Plywood is made with three or more layers of thin wood glued together with the grain. This kind of plywood can be used on roofs with minimal load.

Every piece meets the highest grading standards for strength and appearance. One side is usually better quality than the other c in this case. A is smooth and knot free while d the lowest quality has missing knots and cracks. Many factors affect thickness.

Steeper rather than flatter roofs will have lesser load per sq. Sheet with varying thickness. Plywood sheathing delivers outstanding stiffness strength and versatility. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

What kind of plywood for the roof. Sheathing sizes 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. Tongue and groove plywood or osb sheathing plank sheathing. The common grade of plywood for roof sheathing is cdx.

Plywood typically comes in 4 8 ft. Sometimes referred to as roof sheathing or a roof deck this plywood acts as a foundation for the layers of underlay and the shingles on your roof and connects the roof to the frame of the house. Foot and with a maximum of spacing of 16 inches between rafters. Cdx plywood is a construction grade type of plywood that is designed for exposure to the elements.

Even though it isn t visible it is very important to the structure of your home. Most construction sites will consider the use of either osb or plywood for the roof. As a quick primer in plywood each side is rated from a to d.