I have a quonset-style garage, one with the tarp-like cover that I want to convert into a greenhouse. The company makes a greehouse kit for this building but it costs almost as much as the silly thing did originally. I am thinking I could probably cover it myself with greenhoues fabric for less (haven't priced it yet though) but wondered how I would secure it to the framework. It is metal tubes. The building is 12'x20' and somewhere between 9 and 10 ft high at the top, as far as I can tell. Some of my thoughts are installing a 2x4 ridge pole and purlins about halfway down each side and stapling the stuff to it. I then thought maybe I could staple the bottom of the plastic to 2x2s that could be fastened somehow to the pt 4x6 I used as a foundation or could be rolled up to allow ventilation. I would probably also need some way to ventilate the top of the thing also. I will frame the ends for doors and vents too. When I enclosed the one end for the chicken house I used the metal strapping with holes in it that is used to hold pipes to secure the 2x4s to the metal tubing. I would probaly use pipe clamps to hold the ridge pole and purlins to the framework and the strapping to secure the uprights at the ends. Will this work or is there some other way to do it?