Originally Posted by speedplay

(unless you want to sod the expence and go for marine just for the hell of it lol )

Originally Posted by MattCo

Marine and exterior are the pretty much the same thing except for standards. Exterior is allowed a higher void content and a greater variation in materials and strengths. The adhesives used in the ply which acts as a moisture barrier (external surfaces need sealing on both) are the same. Marine would be a waste of money.