I get the impression you have very little air movement in your greenhouse?
This alone will give you lots of problems.
next would to better insulate the door.
As far as the plants the damage is done, just watch them close for signs of
rot and remove it quickly so it does not spread to the rest of the plant.
Remember to sterilize any tools and open cuts you make.
In particular Phal's will quickly show damage to leaves, so try to protect
the crown from any spreading rot caused by freezing.
Michael

"Deborah F. Ryan" wrote in message
...
Folks, I've been reading through old posts hoping that I could find the
answer (if there is one) to no avail. We only have about a dozen orchids.
All in our little greenhouse which has managed to keep an average internal
temp of 60*f (NW Indiana) and all on the same self-watering tray they
have
been on for several years. The only difference this year, was they were
moved closer to the door. Obviously, a Really bad move on my part
Despite the temp being well above freezing, every pot froze solid to the
mat
and the plants look just awful. They were immediately moved to the
highest
shelf (as close to the heating source as possible), but it's been nearly a
week and they aren't looking any better. At this point, would bringing
them
indoors Really do them in, or just leave them were they are? Talk about
feeling sick...
Thanks in advance!
peace...debbie