Posted: 26/08/2013 at 21:13
Although space is limited hct. I'd buy the biggest one you can afford and will fit in the space. If on a budget the pastic four shelved grow houses are fab. They've a tendency to get blown over in Winter but if weighted down or tied to something solid are fine. The covers do eventually perish but are cheap to replace.
Moving up market you could get an aluminum or wooden framed grow house. Aluminium needs little up keep but wood, would need to be treated every so often.
Then there's glass or polycarbonate. A few pointers to consider, polycarbonate is probably safer if small children frequent your garden.
Now I'm happy to be wrong with the following pointers as I have a glass GH and haven't used polycarbonate...but one lets in more light and glass is less likely to get scratched when being washed, you'll need to wash it at least once a year, probably twice, in the Autumn and again in the Spring, me also thinks one retains heat better, not sure which though, I'm sure someone will be along shortly to tell us.