# How many sheets of OSB do I need for a roof?

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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.

## What size OSB do you use for a roof?

Typical types of wood used for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. 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.

## Can you use 7/16 OSB on a roof?

…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.

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## How do you calculate roofing sheets?

Divide the length of your roof area by 0.760 to determine the number of sheets you need. For example, a structure that’s 6.0m long is 6000 / 760 = 7.89 sheets.

## 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.

## 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.

## Will rain hurt OSB board?

The OSB floors should be swept clean each day after work concludes. This debris can trap water and hold it against the OSB. You want all the lumber to dry out as fast as possible after each rain. … You want the sides of the stacked lumber exposed to the air but protected so rainfall can’t hit the lumber.

## Which side of OSB goes down?

Which side of OSB subfloor goes up? “This side down” applies to when it’s used as subflooring. That side should be facing down, against the joists. When used as wall sheathing, that side should be against the studs.

## Can I use screws for roof sheathing?

Screws can be used for even greater withdrawal strength, but should be sized by the building designer. Staples are not recommended for roof sheathing attachment in high-wind areas. … Oriented strand board (OSB) is one of the most popular materials for roof sheathing.

## How do you price a roof?

The average cost to replace a roof can vary quite a bit. According to HomeAdvisor, the typical range for roof replacement costs is between \$5,100 and \$10,000, but roof replacement can be as low as \$1,200 or as high as \$30,000. Many roofing companies will charge between \$3.50 and \$5.00 per square foot.

## What is the standard size of a roofing sheet?

Tata Durashine Steel Tile Roof

Sheet Thickness 0.45 mm TCT (Standard) 0.50 mm TCT (Premium)
Standard Sheet Length 1830 mm (6 ft), 2440 mm (8 ft), 3050 mm (10 ft), 3660 mm (12 ft), 4270 mm (14 ft), 4880 mm (16ft)
Overall Profile Width 1090 mm
Effective Cover Width 1000 mm
Min. Roof Slope 15 degrees

## How much should roof sheets overlap?

It is usual to allow roof sheets to overlap into gutters by about 50 mm. The valleys of sheets should be turned down at lower ends and turned up at upper ends. For maximum weather-tightness, start laying sheets from the end of the building in the lee of the worst-anticipated or prevailing weather.

## 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.

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## 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 plywood do I need for a 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.