Osb Size For Shed Roofing

You now have a total of 750 square feet.

Osb size for shed roofing. 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. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. Divide that by 32 to get the number of sheets needed.

The most common uses are for sheathing in walls flooring and roof decking. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load. Despite its common use as such we don t recommend using osb for subfloors but that s really just for aesthetic reasons.

The lower the slope the more weight for snow load but less wind force. So i will try and simplify what you need to know. For pricing and availability. Even though plywood is more expensive and osb stronger my recommendation for a shed roof is 5 8 or 3 4 construction grade exterior rated cdx t g plywood.

In the case of a subfloor deformations left in the osb after it dries can lead to wavy flooring. With edge support and the same snow load 3 8 inch osb can be used. This manufactured wood product is composed of small wood chips that are arranged in layers and glued together. Oriented strand board osb is a material with high mechanical properties that make it particularly suitable for load bearing applications in construction.

Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. It is a long document with many parts and subsections. Make sure that you add for the slope of the roof. Adding 20 is industry practice.

A viable alternative to plywood this osb board is engineered to prevent any cupping warping or splitting. Osb sold in the uk is made to comply with bs en 300 oriented strand board osb definitions classifications and specifications. The higher the slope the more quickly the snow and rain will be shed but also the greater the wind force. For heavier loads a 40 20 rated panel 19 32 or 5 8 will support a 130 psf live load and 48 24 rated panels 23 32 or are good to175 psf.

The main floor area is 600 square feet and the wing floor area is 150 square feet. In this case add 150 to get a total of 900 square feet. Osb is sold in 4 by 8 foot panels and the standard panel thickness for osb sheathing. Thicknesses range from 5 16 to 3 4 inch and the proper one to use.

New homes will usually see a few rainfalls before a roof is on and as noted above osb doesn t handle moisture well.