A 4×8 sheet of plywood is 32 ft2. So, dividing the area of the roof by 32 will give you the number of sheets needed. For example, if your roof is 1,500 ft2 then it will take 47 sheets of plywood to sheath it.
How do you measure plywood for a hip roof?
Divide the total roof area by 32 to get the number of sheets you will need to cover the roof. A typical 4 foot by 8 foot sheet of plywood covers 32 square feet. 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. Add 10 percent to allow for waste.
What is the minimum thickness of plywood for a roof?
Minimum Thickness
Most roofs will be sheathed in plywood at least 3/8 inch thick. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.
How much is a sheet of plywood for roofing?
Your price could vary depending on how much the roofing company charges for labor, but generally, you can expect to spend between $70 to $100 for each sheet of plywood. A 4 x 8 sheet of plywood covers about 32 square feet of roof area—and the average roof measures about 3,000 square feet.
How much does a 4×8 sheet of plywood cost?
A 4×8-foot sheet of construction-grade plywood costs roughly $10 a sheet, while the same size sheet of OSB costs only $6 a sheet. Both cost about the same to install, $70 an hour for a carpenter. Installing either sheathing over a 500 square foot area would cost roughly $160 in material for plywood and $100 for OSB.
How do you calculate sheathing for a hip roof?
Calculate Sheathing Needed
So, dividing the area of the roof by 32 will give you the number of sheets needed. For example, if your roof is 1,500 ft2 then it will take 47 sheets of plywood to sheath it.
What is better for a roof OSB or plywood?
Plywood Holds the Moisture Advantage Over OSB
When plywood gets wet, it tends to swell. … OSB takes longer than plywood to get saturated, but also takes much longer to dry out. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks.
What plywood do you use for a roof?
CDX is the grade of plywood most commonly used for roofing (CDX plywood means it is Construction Grade for exterior purposes).
Is 7/16 OSB OK for roofing?
…or a non-laminated panel, such as this OSB. Either one is acceptable. The typical thickness of roof sheathing is about 7/16-inch, which is just under 1/2-inch. … If you find 3/8-inch plywood installed as roof sheathing, it’s a good idea to make your client aware of its presence.
Can you roof over wet plywood?
A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the steam finally escapes.
How much does a sheet of 3/4 inch plywood cost?
Cabinet Grade Plywood
| Thickness | Type | Price |
|---|---|---|
| 3/4″ | Sandeply Hardwood | $43.97 |
| 1/4″ | Oak Plywood | $25.97 |
| 1/2″ | Oak Plywood | $42.97 |
| 1/2″ | Birch (3 ply) | $41.97 |
How many bundles of shingles does it take to cover a sheet of plywood?
Each plywood sheet is 4 x 8 feet or 32 square feet, which coincidentally is almost exactly equivalent to the coverage of one bundle of traditional three-tab shingles.