The recommended minimum thickness of osb panels for timber frame walls is 12mm when the cells in the supporting frame measure up to 62 5cm on a side and 15mm for frame members spaced up to 83 3cm apart.
Osb thickness for roof uk.
However you might find that osb can better suit your needs than plywood for the roof.
Sterling board is resistant to water with the osb3 option being particularly suitable for humid conditions.
So i will try and simplify what you need to know.
For shed construction there are two commonly used grades of osb.
Osb sold in the uk is made to comply with bs en 300 oriented strand board osb definitions classifications and specifications.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
Half inch osb is suitable for rafter spacings up to 24 inches whether or not the edges are.
18mm was initially chosen for its strength.
They can range from the standard 4 x 8 piece to a 4 x 9 or even a 4 x 10.
Because of its construction some manufacturers actually make larger sheets of osb.
We have the right sized osb3 board for almost every job.
It is a long document with many parts and subsections.