completely true. If you're leaving your ramps outside, staple tar paper over the plywood, and then surface it with skatelight. It might be a bit expensive, but it's really smooth, and waterproof, and with the tar paper underneath it, there will be absolutely no leakage whatsoever, and your ramps will last a good while.Josh Young said:oh my god someone from michigan!!!!!!!!!!!!!!!!!!!!! dude i have somefriends that live in grand rapids. We need to ride sometime. OK back on subject. I just got a new set up. complete with a 9ft vert wall. and i have like a crap load of other stuff. i will post pictures later. and for you people that think that building a NICE ramp dont take anymoney. Dont go to anywhere bc some ply is 25 bucks a sheet. also DONT LEAVE OSB OUTSIDE TO GET WET. PUT A LAYER OF SOMETHING ELSE OVER IT. IT WILL ROT THROUGH OVER TIME!!!!!!!!!!!!!!!!