Roof Plywood Thicknesses Mixed

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Roof plywood thicknesses mixed.

Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. A 1 2 sheet is actually 15 32 thick. With edge support and the same snow load 3 8 inch osb can be used.

Exposed fastener corrugated steel roofing. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. When this is the case experts recommend a 5 8 inch thick sheet. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness.

The standard width is 4 feet. You might be tempted to choose a inch thickness although it s unnecessary in most cases. Metal roofing thickness recommendations that include paint. These recommendations are with paint.

Keep in mind that the load of the roof still plays a role in the plywood thickness. A 3 4 sheet is actually 23 32 thick. Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. Please understand that recommended metal thicknesses will vary based on the design and engineering of the metal product being considered that said here are a few general recommendations.

You can get plywood sheets with a length of up to 10 feet. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.