"shazzbat" wrote in message
...


Roof vents certainly are, especially the automatic type. I would arrange
it so that the roof vent(s) is on the side away from the prevailing wind,
so the wind doesn't get under it.

Also try to arrange the greenhouse so that rainwater falling on it comes
off at the end which suits you. Best to do this before putting the glass
in.

Steve


You may benefit from reading a book or two on the subject as there are too
many points that can be constructively covered here.
Greenhouse Gardener by David Shelton is one such publication.

Regards
Pete
www.thecanalshop.com