However there are some sceptics out there who doubt the strength and durability of osb.
Osb or plywood for shed roof.
Using oriented strand board osb for shed walls floors and roofs.
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.
The higher the slope the more quickly the snow and rain will be shed but also the greater the wind force.
Plywood with similar propertiescurrently costs about 30 more for an equivalent thickness.
University of massachusetts meets most building codes for roof and wall sheathing.
Alternatively osb is created from wood chips resin and adhesive that is baked and formed into the shape of a sheet of plywood.
As with plywood osb typically comes in 4 ft.
2x greater shear strength than similar sized plywood source.
Osb is less forgiving of being left out in the rain and will show more deformities after a wetting and drying cycle.
It is extremely resistant to moisture.
The lower the slope the more weight for snow load but less wind force.
Plywood will absorb moisture quicker than osb but consequently it will also dry quicker.
However when it is penetrated by water it takes a very long time to finally dry out compared to cdx plywood.
Today you can find osb in thickness from 7 16 to 1 1 8 for different applications from roof wall subfloor i joists and everything between.
Both products will swell when wet but plywood will return to almost its exact shape when it dries.