Roof Plywood Thicknesses Mixed

Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness.

Roof plywood thicknesses mixed.

When this is the case experts recommend a 5 8 inch thick sheet. Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. Metal roofing thickness recommendations that include paint.

A 1 2 sheet is actually 15 32 thick. A 3 4 sheet is actually 23 32 thick. You might be tempted to choose a inch thickness although it s unnecessary in most cases. Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot.

With edge support and the same snow load 3 8 inch osb can be used. The standard width is 4 feet. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. These recommendations are with paint.

It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood. You can get plywood sheets with a length of up to 10 feet.

It will support roof. 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.