I'm having a greenhouse built at the moment, but we haven't decided on the wall material yet. It's a wooden frame greenhouse made of 4x2 wood, 4.5m x 2.2m, concrete slab floor. It's right beside a bank so external access is difficult, there's a few trees around, and it's fairly windy there so strength may be important. The main reason I'm having it built is the wind kills my plants, summer and winter.

It will be to grow seasonal vegetables. I'm not trying to grow tomatoes or strawberries in winter, so I don't need it super hot in winter, in summer the challenge is cooling it down - lots of windows.

Wall options:
 - Glass (fragile so occasional replacement, labor intensive, low to average price, average insulation)
 - Single thickness perspex (very strong, not much labor, medium to high price, average insulation)
 - Double wall thickness perspex (strong, average labor, medium to high price, good insulation)
 - Wavy clear plastic (average strength, average labour, average price, poor insulation)

Ceiling options:
 - Perspex (may let in too much heat/light in summer, good in winter)
 - Semi-opaque plastic (will help prevent it getting too hot in summer, in winter the sun's low so won't prevent much sun getting in)

Any thoughts?