In reply to paul wood:
> How is the outside protected from the weather?
The inside is a sheet of ply, the frame timber with metal strengthening, the outer skin OSB with roofing felt. Basicly it was a series of A-frames.
> Would you use the same shape if doing it again?
No, the steeper side is too steep.
> Where did you get the mats?
Local university - they throw them out often
> ok I better stop. Shame your not near the Wye valley as I could have picked your brains over a pint
Pop in when you are climbing on Dartmoor or Torbay.