I have mine on net curtain wires, also set up on the outside. For the reason that Two_Sheds said - because it stops the glass itself from heating up, and therefore helps to keep the temperature down in the greenhouse, as well as protecting from scorch. Plus, you don't have to faff about with clips on the inside to hold it flat to the glass, and the plants don't get in the way of opening and closing it.
I just used the bog standard shade/wind-break netting, and bought the stretchy net curtain wire in a 25ft length off eBay for a couple of quid.
I just used the bog standard shade/wind-break netting, and bought the stretchy net curtain wire in a 25ft length off eBay for a couple of quid.
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