11mm Osb For Shed Roof

So i will try and simplify what you need to know.
11mm osb for shed roof. To make your shed complete the final step is building the shed roof. I roofed my stable with 11mm sheets covered with cheap shed kennel felt three years ago. Im fixing some tapco tiles to a roof that has 11mm osb board then battens on top. There is also a plastic sheet dpm sheet as its only a field shelter then sarkit on top of the osb board then 32 x 25mm battens.
A good alternative to ply wood and usually cheaper we stock osb3 board in a selection of sizes. Most osb suppliers have a load span table giving a guide to the spacing of timbers for different thicknesses. Could a cover the boards with a tarp after boarding for a few weeks to a month before i felt fiberglass it. Still as good.
Typically 3 4 18mm for floors and 3 8 9mm for walls and 1 2 11mm roof. The thickness of osb that you need varies on where it is used in a building. Does it has to be osb3 or will osb2 do. 8 x 6 11mm shiplap with osb roof floor 8 x 6 12mm shiplap with t g roof and floor.
As with flooring you have a number of roof options with the standard to premium levels of protection from the elements. 9mm 11mm or 18mm. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Any advice much appreciated as i ve never had a shed with osb before.
For shed construction there are two commonly used grades of osb. I have rafters that are 40cms apart beneath the osb sheet. Also make sure that you get your supporting timbers at the correct spacing. Which would be better.
Replacement shed roof osb or ply. Thicknesses range from 5 16 to 3 4 inch and the proper. The fixing guide says i need 18mm. For heavy duty roofing you may want to opt for an 11mm tongue and groove roof additional roof trusses can offer even more support for your shed roof.
Will the 11mm board suffice. Osb3 is just as good as regular shuttering ply. Would a 9mm ply board be better than 18mm osb. Will the thickness make a difference.
It is a long document with many parts and subsections. So does it matter on the what timber sheets i use to board the roof.