In reply to Jim Houghton:
I was in charge of a wall in a school sports hall for over 10 years.
Random issues to consider:
- Can you afford/accommodate something with features/overhangs rather than merely vertical.
- Remember when route setting that users will have very different sizes! and ability.
- Staffing... are PE staff on board or are you relying on other teachers?
- Will there be conflict between climbers/belayers and other activities like basketball practices?
-Will there be pressure to allow other external users in at weekend etc.?
- Will the school provide climbing shoes or will the kids just wear trainers?
Entreprises built ours and were very efficient and receptive in the design phase.