DIY climbing wall My hubby did this for our kids in the backyard. I bought the rock wall grips on eBay and the the ply bored is 3/4" that is 4 foot by 8 foot, we purchased from Lowes. We painted it with Restore (for decks) and screwed it into our home. Also when we installed the hand grips we cocked the holes with silicone to keep the wood from rotting out. A pretty simple project that my kiddos and our neighbor kiddos are loving!