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Osb plywood roof thickness.
Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
There are several factors to consider.
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.
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.
What size plywood should you use for your roof.
However you might find that osb can better suit your needs than plywood for the 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.
So what size plywood should you use for your roof.
The minimum thickness of plywood used for roofing is 3 8 th of an inch.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
Fortunately this is one issue that has primarily been standardized by the industry.
Another issue that many people encounter is what size plywood the roof may need.
Watch this now to learn how to avoid this same pr.
Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.
I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.
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.
This kind of plywood can be used on roofs with minimal load.
The industry offers a thickness of anywhere from 5 16 inch to inch.
Foot and with a maximum of spacing of 16 inches between rafters.
Look for something that s graded as exposure 1 or exterior.
Thicknesses range from 5 16 to 3 4 inch and the proper one.
With edge support and the same snow load 3 8 inch osb can be used.
The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch.