Thanks, agolley and 1kathlene. I'll contact ACF. Kathlene, I'm planning to build mine out of treated lumber and polycarbonate. Maybe I shoud accept the higher cost and go with triple-wall PC. Can you ascertain the cause of the leakage in your friend's GH? Wood warping? Does friend's GH use PC extrudates (H-shaped PC bars) to secure and seal PC panels? Was the PC originally well sealed with silicone? I'd sure like to communicate with your friend if he/she is willing. My email is
hdc@hughes.net.
Thanks again,
Hank