Update on the Nortene Plastic greenhouses
I had assembled the two greenhouse frames in my garage. On checking them today I found that four plastic joints had split. This shows an inherant weakness in the design.
I repaired them with nylon cable ties (8 inch) wrapped twice around the joint and pulled tight with pliers. I then decided to reinforce all the other joints by putting cable ties on them. One 6x4 greenhouse requires a packet of 100 "Green Gem" ties at £1.34.
Hopefully this will solve the problem, if not, I shall make new frames with 25x50mm sawn timber.