Greenhouse

A greenhouse comprising a plurality of tubular frames each frame comprising a plurality of tubular members joined to each other by joining members to form walls defining a first area and to form a roof covering a portion of said first area;

• spaced apart layers of plastic sheet extending over the frames to act as a means of preserving heat within the greenhouse;
• track means interposed between the roof and the walls whereby the roof may be moved along the track to cover a preselected part of the first area;
• channel members running along the top and bottom of the walls, said channel members facing outwardly;
• a filler to fit loosely into each channels and to receive the ends of the plastic sheets, wrapped around each filler;
• locking means to maintain each filler, with the plastic sheets wrapped around it, in place within the channel member.