This lovely assistant is showing how the venting portion works.
Reading over at Garden Desk, I was especially eager to get the book Marc recommended, The 12 Month Gardener, Simple Strategies for Extending Your Growing Season by Jeff Ashton, because that's where they got the plans for their wonderful greenhouse. I've wanted a greenhouse for a while, but more so since I started reading Fast Grow The Weeds blog.
Building the frame took about 4 hours from start to finish. I was really surprised at how big it turned out to be. For some reason, I have a terrible time picturing a completed size. I guess we could have marked out the frame before we built it but really, the book assures us that had we gone smaller, we'd have regretted it. Thankfully, we have lots of room in the yard. All that's left to do is staple the greenhouse wrap on it and start growing. Now that it's done, I'm not so sure that I need a greenhouse after all. I mostly wanted one to start seeds but this cold frame can do that and more. We laid out every flat we have and we only filled it halfway. That leaves plenty of room for moving plants into larger pots and even just growing directly in it.