Plastic greenhouses
Plastic greenhouses are made of polycarbonate (PC) material.
Plastic is less expensive than glass, easier to install and lighter.
However, if you have a large budget and are having your greenhouse installed
for you glass may make more sense.
The polycarbonate material in the plastic greenhouse wears out faster
than glass and is easier to scratch. You can buy double and triple-glazed
PC which is impact resistant. This is not much more expensive
If you're considering a plastic greenhouse, consider your environment
as well. Plastic is advantageous if you have a lot of wind. If something
falls on a glass greenhouse during the windstorm it is much more likely
to break.