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This is the view from the south end. It is 15 foot wide, and is a design ( no longer made) called Hartley Botanic. The point of the half round shape is to maximise light gathering. Think of the classic Dutch House, with 75˚ sloping sides and a shallow 15˚ roof designed to suit The Netherlands ( on the same latitude as UK ) - this just takes those ideas a couple of steps further forward.
But it is expensive to manufacture - instead of single glazing bars for the roof there are 3 at each place, needing rigid connections, so the roof is supported on trussed arches.
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There is a lot of other stuff to mention visible in this pic, but I'll get to it later.
The roof shape also means that the layer of polythen insulation - twin walled sandwiching large bubbles , usual in UK, has to be on the outside :-Name: bubble-p.jpg Views: 613 Size: 123.5 KB
Also on the outside now are roller blinds made of aluminum strip 60% shadecloth ( home made ) which I roll down for the summer, and roll up and secure at the ridge for the winter :-
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These are amazingly effective ; when the sun shines on them, you can't look at the reflected light without being blinded.

The inside, the plants, the techie' in next postings.....