Click on the link to see pics of my clearspan greenhouse
http://www.freewebs.com/allianceproduce/pictures.htm
Chuckie Greenthings
hi flygirl i'm not quite sure what you mean by double wall sides it is
possible to build a greenhouse very cheaply and easily using a timber
or metal framework with a covering of polythene then insulating it with
horticultural bubble film.
building one from other materials such as glass or twinwall
polycarbonate can work out expensive and difficult for the amateur to
construct .
ray