Here is a picture of my cold frame Glen built last fall. I haven't "taken it for a spin" to see what it will do yet. The main reason I wanted one was so I could start seeds early. The bed is an existing seedbed we made with posts. Glen welds so he made a simple metal frame to lean the windows on. The ends are enclosed with a fiberglass type material we had. I'll let y'all know how it turns out.