"David in Normandy" wrote...
Frederick Williams wrote:
Can anyone recommend web sites that instruct one in the building of a
greenhouse? Googling doesn't turn up anything interesting.

I built my own once at a previous house. I plan to do so again sometime at
my new house. A lot depends on the balance you want between useful and
pretty. I didn't use any plans - other than my own sketches. It is a
simple matter to use some 3" x 2" pressure treated timbers to build a
frame and fasten clear corrugated PVC sheets to it. You don't need to make
any fancy joints if you don't want to, just use metal angle joining
brackets which are cheaply available from places like Wilko's. The hardest
job with mine was laying a concrete floor - I mixed all the concrete by
hand and it was back-breaking.

I built ours as a Lean-to against the back wall of our garage.

Dug out and poured concrete into some footings, finished level with the
soil, built a 3 brick high wall on that with ally angle brackets screwed
into the top of that for the upright posts. To finish the base, a concrete
capping on top of the bricks finished at an angle to take the
condensation/water etc away from the wood.
Spacings of wooden uprights depend on the size of glazing you can get/want.
I used 2 x 4 corner and door posts with 2 x 2 for the other bars. ( strong
because I need to get on the roof some times, with a walking board of
course)
Glazed with acrylic for warmth and safety.
Roof is twin walled plastic but I wouldn't use it for all the glazing as it
can "draw" some plants that like a lot of light.
Don't forget a door.

Use as much plastic and non ferrous metal as you can to avoid rot....brass
screws, plastic glazing bars, etc. and treat all timber before use and paint
before final assembly. Dulux Weathershield (Satin White) paint system is
good.

--
Regards
Bob Hobden
just W. of London