the greenhouse is warming up, too. It's about 55 degrees outside, partly cloudy, and it's a balmy 90 degrees in the greenhouse. Perfect weather for sprouting seeds. the 90 degree weather inside will warm the ground, and that warmth will keep the greenhouse 10 to 15 degrees above outside temperature over the evening, and then warm up in the morning.
|greenhosue door framing, before plastic applied.|
leaving 2" of clearance at the bottom of the door (for dirt buildup over time). the door is framed with 2x4, with a pair of eye bolts mounted on diagonal corners and a turnbuckle in the center to tighten it up. It's not a heavy-duty door, but then, it's not doing a heavy-duty task. It'll last 3 or 4 years and then need to be redone, about the same time as the plastic covering of the greenhouse itself.