Whether you need osb products as loadbearing or reinforcing boarding on ceiling joists in attics as roof or wall panelling or as flooring the right thickness depends on the application and the loads they must support.
Thickness osb for desk roof.
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.
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Using osb osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.
Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same.
Thicknesses range from 5 16 to 3 4 inch and the proper one.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
When this is the case experts recommend a 5 8 inch thick sheet.
Keep in mind that the load of the roof still plays a role in the plywood thickness.
For this you can either go for a half inch or 5 8 inch thick sheet.
A flatter roof with rafters farther apart may need a thickness of up to inch.
In this case you can t use a 3 8 inch thick sheet.
I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.
Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
Once the spacing hits 24 inches a 5 8 inch thick sheet is more ideal.
Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.
It s also important to keep in mind that osb boards are available in different grades and use classes.
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.