I forgot to mention Uncle Vito, your initial query on humidity. If I had
to do it again, & no existing concrete
slab, I would put heavy duty plastic weed liner down (it breathes) then
crushed brick. Building suppliers actually
sell it & I heard it holds moisture like crazy & therefore more humidity.
Cheers Wendy

"Uncle_vito" wrote in message
...
I am considering building a greenhouse for my orchids. It is the humidity
that I want/need. Living in Southern California, low temperatures are not
much of a problem.

Also, seems like most orchid growers in the area (Normans, SBOE) use shade
cloth or opal translucent polycarbonate panels overhead.

I am looking for a greenhouse kit with these opal translucent
polycarbonate panels for the roof. All that I can find seem to use clear
panels.

What are you folks using? Clear glass/polycarbonate with shadecloth or
opal panels?

Also seems that clear glass would make the GH hotter than heck, even with
the use of shadecloth.

Thanks for any advice.

Vito