On 23/06/2013 23:25, David Hill wrote:
On 23/06/2013 22:42, Spider wrote:
On 23/06/2013 21:55, David Hill wrote:
On 23/06/2013 09:28, Howzit_China wrote:
Here's a quick drawing with the back adjusted to 2m.

The reason for the elaborate roof on my original drawing was to get
around what is happening in this drawing, which is that the roof angles
of the sides are different due to the different side widths so the
polycarbonate will need to twist slightly to fit the frame, but maybe
this will not be a problem.

Is polycarbonate strong enough that I could use one sheet for the
entire
roof and one for the front without any supports in the middle?


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BRINGING THE TOPIC BACK

On 23/06/2013 21:50, David Hill wrote: On 23/06/2013 19:29,
Howzit_China wrote:
Great thanks for all the responses.

Maybe I would be better off getting a blow away, especially if rot
becomes a serious problem, I will do some further cost benefit
analysis.


I think the main thing to decide on before continuing is the
design/dimensions before dealing with ventilation and rot prevention.

As two posters have mentioned the height I have been giving this some
thought, I don't want to upset my neighbour by going too high
above the
fence so what I could do is raise the height to 170cm, and dig down
30cm
into the ground giving a highest point of 200cm.

To be honest I didn't envisage myself spending too much time in the
greenhouse but I guess if I am going to go through the effort I
might as
well do it properly.

Photo of the plot attached, taken 20 mins ago. There is just lawn in
front of the plot, It is West facing and gets sun approx 12:30 to
18:00


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Having seen the picture I fail to see why you want to make it such a
problem, and so much more work for yourself.
Keep to a regular shape and move the path.
You could even remove the screen block wall and extend the present
conservatory/ structure another 6ft or so along the fence, you could
use the same small profile plastic sheeting that you now have on the
existing roof, Much cheaper than polycarb and line it in the winter
with large bubble film.




Sorry to break in on David's post, but this is the first time I've seen
the photograph and made sense of the site and the quest for your
greenhouse.

In your position, I would stick to buying an off-the-shelf
aluminium/poly greenhouse, as you first thought. It would have
(presumably) some sort of guarantee *and* be a whole lot more attractive
for you and your neighbours. You could then choose to supplement it
with homemade coldframes or mini-greenhouses to suit your own
requirements. These would free up a lot of space in the main greenhouse
when seedlings/plants reached hardening off stage and still give you an
interesting project. The height would be less of an issue with
neighbours if the structure was traditional and halfway decent to look
at.

You're not breaking in.



Thanks for saying so.

--
Spider
from high ground in SE London
gardening on clay