To find the squares divide the overall roof area by 100 and then round up.
How much plywood in a 22 square roof.
For a 2 400 square foot roof you can expect to spend 792 to 1 704.
To find the amount of plywood needed to cover a roof start by finding the area of the roof.
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.
Add an additional 10 for waste and mistakes.
Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed.
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.
The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size.
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.
Labor costs vary based on the type of underlay at 0 15 to 0 22 per square foot.
Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.
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.
A square simply refers to a 10 x 10 square of roofing.
For instance if the roof is 1550 square feet then it is 16 squares.
Divide the roof s area by 32 32 is the total area of one sheet of plywood to find this figure.
800 32 25 sheets.
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.
The most common uses for plywood include support for floors walls roofs and garages in residential construction.
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.
A run 31 long will also take four sheets with a 12 piece left a remainder.
For example if your roof is 3 000 square feet divide 3 000 by 32.
Although roofing projects are estimated and sold by the square.
This is simply 100 square feet of roof.
How to estimate roofing materials.
It will take four sheets.
No calculator can tell how much waste will be on each run plywood.
One sheet 32 ft.
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.
That is dependent on the lay out and where it ends with the plywood.
The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements.
This basically calculates the number of sheets needed for a gable roof.
Find the area of a roof.
Add 10 percent.
Sometimes there is no waste such as on a run 32 long.
