Known in the climbing community as a "woody", a (usually indoor) climbing wall constructed with plywood and bolted on holds, isn't too difficult to make. We made one in a basement for about seventy dollars and change (which we raised by selling other peoples' things on craigslist).
Things you'll need:
- Some 3/4" plywood
- Some 2x4s (or 2x6 or 2x8) for framing and such
- 2" (or so) wood/drywall screws
- 3/8" t-nuts
- 3/8" hex cap bolts
- Drill, hammer
- Something soft to work as a crash-pad
Step 1: Clean
The first step is to choose a location. For us, the perfect location also was so cluttered with things, that you couldn't see the floor. So, for two days (and many beers) we cleaned. We carted away junk, created a pile of things to sell, and reorganized things that needed to be kept. In the process, we found many cool treasures.
Step 2: Framing
The wall you choose to build on needs to be framed well. It will need to support dynamic loads. Lucky for us, this wall, which was being used as shelves was built to be load-baring. A couple of nails here and there, and a a board along the bottom to complete the frame, and it was good enough to use.