Some 20 years ago my late father, Peter Falconer, and I wrote articles for the AJ pointing out the folly of attempting to avoid condensation to profiled metal roofs and cladding by ventilation or vapour-control layers.
I must express amazement at the section shown for the self-supporting profiled Cor-ten panels in the Working Detail on Ian Ritchie's Courtyard Theatre (AJ 07.09.06). I can only assume that the inside of the profiles will run with condensation. Although this may not degrade the Cor-ten, one has to hope the fixing bolts and insulation panels will withstand near 100 per cent humidity.
And where does the condensation go except into the floor?
What is it with architects and Cor-ten? I have never been able to understand the fascination with rusting metal. Perhaps in their efforts to cover every niche market, a manufacturer - probably Saab - can produce an architect's Cor-ten car, which will have a nice satisfying rusty patina but be stubbornly resistant to biodegradation.
Richard Falconer, Painswick, Gloucestershire