Hi all, I am looking at building a shed in the garden to be used as a small woodworking workshop and also to house a chest freezer and tumble dryer. The shed will be 2.4m Height (Apex), 2.4m Width and 2.4m Length and the frame constructed of 47mm x 75mm timber, pressure treated 47mm x 75mm timber frame base (Sitting on paving flags) and 18mm OSB floor. I am looking to cover the exterior walls with 11mm OSB and the roof with 18mm OSB but I am unsure on the best way to weatherproof the walls and roof as cheap as possible. All suggestions welcome. Cheers, Mike.