Welcome back Stumbleupon Gardeners!
If this looks like too much work – I did a much simpler door on the other end.
This weekend I finally got time to start on the doors for my 50 dollar greenhouse. The design that I came up with is light, strong, simple, and can be built easily and quickly using only a circular saw and a hand drill. I must admit that I did use a table saw to rip out the stock, and put it through a planer to accurately dimension it, but this was only a convenience, and isn’t at all necessary for a good result. This polytunnel door design can be built on a set of sawhorses out in the driveway, but it will be a lot easier if you get someone to help you hold things while you saw, drill and fasten parts together. » Read more: Building Greenhouse Doors