Add an additional 10 for waste and mistakes.
How much plywood in a 22 square roof.
Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet.
One sheet 32 ft.
A typical 4 foot by 8 foot sheet of plywood covers 32 square feet.
To find the amount of plywood needed to cover a roof start by finding the area of the roof.
For example if the area to be covered in plywood is 800 ft 2 then 25 sheets of plywood will be needed to cover it.
Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.
Divide by the total square footage by the square footage of a sheet of plywood to find the number of sheets required to cover the space.
A square simply refers to a 10 x 10 square of roofing.
The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements.
Divide the roof s area by 32 32 is the total area of one sheet of plywood to find this figure.
A run 31 long will also take four sheets with a 12 piece left a remainder.
If your roof area is 1 600 square feet 1 600 divided by 32 will mean you need about 50 sheets to cover the roof.
Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed.
When used for roofing plywood panels are covered and protected by a variety of building materials that keep the elements at bay including roof felt underlayment flashing and shingles.
For a 2 400 square foot roof you can expect to spend 792 to 1 704.
This comes out to about 94 sheets of 4 x 8 plywood.
A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off.
The most common uses for plywood include support for floors walls roofs and garages in residential construction.
Although roofing projects are estimated and sold by the square.
The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size.
800 32 25 sheets.
How to estimate roofing materials.
Sometimes there is no waste such as on a run 32 long.
For instance if the roof is 1550 square feet then it is 16 squares.
This basically calculates the number of sheets needed for a gable roof.
Add 10 percent.
Labor costs vary based on the type of underlay at 0 15 to 0 22 per square foot.
There is a range of different solutions for roofing underlay some are tacked or stapled while others are self adhesive ranging in price from 0 18 to 0 49 per square foot for materials only.
No calculator can tell how much waste will be on each run plywood.
A 4 8 sheet of plywood is 32 ft 2.
That is dependent on the lay out and where it ends with the plywood.
To find the squares divide the overall roof area by 100 and then round up.
Find the area of a roof.
