Plastic roof for enclosed attachment

helen33

Hi,

We have a small enclosed attachment on the side of our house which is covered with a plastic corrugated roof supported by wooden beams. It's in poor condition so needs to be replaced.

Besides the corrugated plastic, does anyone know what other kinds of economical roofing material, plastic or non-plastic, would be suitable for this?

Must haves include:
- transparent to let more light in
- able to support snow and ice in the winter (and possibly someone walking on top)

Nice to have:
- some way to ventilate it in summer (instead of trapping heat like a greenhouse)
- insulate in winter
- scratch-resistant

Thanks for any advice or suggestions!

Helen