Reparing rips on plastic greenhouse.

I am gutted. A stray cat (and I love cats) has been using my plastic greenhouse to sunbath on the roof and has now made a dirty great tear along it. How it got on it is a mystery as there is no way of getting to it.

Does anyone know a better way than sellotape to fix this before it becomes a write off ?

You can buy a special tape for repairing polythene on greenhouses and polytunnels.
You do need to tape it on both sides.

http://www.polytheneone.com/polytunnel_polythene_repair_tape.htm