It’s only a shed / workshop so I used 11mm OSB3.
I was thinking of using the lap sealant/adhesive, or roofing mastic as it semi cures so the OSB can still move.
Hi all apologies for my 1st post asking question, I have been lurking around for a while, and seeing some great workshop builds.
I have re roofed my workshop with OSB3 and have left 3mm gap In between sheets. I plan to felt over the top and then maybe some onduline over the top at a later...