Greenhouse - Part 2

We finished construction on our backyard greenhouse about a week ago, and my mom got all of her seeds planted and sprouting, but during some of the bad (Typical Colorado) weather we've been having recently, one of the panels on the door of our greenhouse simply fell out. This caused the temperature to drop a ton, and we had to fasten little clamps all over the greenhouse so that no other panels will fall out anymore. We have also had a bit of difficulty keeping the greenhouse warm enough, again due to the weather, and my mom put an outdoor rug on the floor and we have a propane heater in there as well. All in all, it's been an interesting first week of having our greenhouse up, but as of now, it's looking great.