Roof Plywood Needed

The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements.

Roof plywood needed.

A standard sheet of plywood is 4 8. Even though it isn t visible it is very important to the structure of your home. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. How many square feet are there in a 4 8 sheet of plywood.

You need to measure your roof using a tape measure. Knowing this number can help you determine how many sheets of plywood you need for your roof. Unfortunately because the roof sheathing isn t normally visible damage can go unnoticed by homeowners. 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.

Keep in mind that the load of the roof still plays a role in the plywood thickness. 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. In this case a 4 8 sheet of plywood is 32 square feet. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

It will be a good idea to get an extra few sheets of plywood when ordering to allow for waste and off cuts. One sheet 32 ft. This basically calculates the number of sheets needed for a gable roof. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

A 4 8 sheet of plywood is 32 ft 2. The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size. You just need to multiply the length by the width. So dividing the area of the roof by 32 will give you the number of sheets needed.

Gable roof sheathing calculator imperial estimate the amount of plywood or osb needed for sheathing a roof. When this is the case experts recommend a 5 8 inch thick sheet.