[pol and mick]

I'm interested in a 2nd hand greenhouse thats come up for sale.However there is no roof vent/opening window. Is it possible to  buy  an roof vent/opening window and fit myself.
Would this be more trouble than its worth,and should i just keep my eye open for a built in opening vent.

[mumofstig]

You can buy them and louvre ones as well...........and even solar powered ones that open automatically

They had some a little while ago on e-bay....have alook even if you don't like buying from there ...it will give you some idea