I'd like to introduce you to my new greenhouse, built up in April/May this year. Until then I was a balcony and window sill gardener, which significantly limited my possibilities.
Fortunately my new garden - facing South - offers much space:
The planning process took some months (great activity for the dark winter time). My choice is a 7.0 x 3.1 metres greenhouse of HOKLARTHERM, a company in the North of Germany, only 50km from where I live. I wanted as much ultraviolet light inside as possible. The only material supporting this is ALLTOP. However ALLTOP is less durable against hail than normal polycarbonate. So I chose triple-wall polycarbonate (hope that this is the richt expression) for the roof.
I wanted to start early in the year, but last winter was much stronger than usual in Northern Germay, so the project could not be started before mid of April. The first day - digging the hole for the foundation - was fun:
Getting used to this mini-digger went fast. Getting rid of all the soil (30 tons) - all done manually - was less fun and also took much longer:
On the next photo I am ready to start to build the foundation:
On the 21st day the foundation is ready:
The foundation is insulated both outside and inside by 5cm Styrodur (you can see the light green layer outside). I stoned the inner side of the greenhouse myself and had a brick-built base been set up by a professional brick-layer:
I had four friends helping me to set up the greenhouse, which took 1 1/2 days:
That was the result at the end of day 43 (counting from the first digging):
The greenhouse has 6 top windows and 2 side windows, all operated by automatic openers. Thats how it looked inside in May:
Meanwhile it's much more crowded inside. Also most of the electricity is installed. This is the inside of the distribution box:
I will do much of the heating (about 5000 Watts required) electrically. I do this by three finned tubed heaters. In case there is one fault, I don't want to fail all of the heaters. So I have installed three seperate lines, each fused seperately (including one residual current operated circuit breaker for each line).
And that's the ventilation:
Due to our weather conditions in Northern Germany I will have a high humidity inside the greenhouse (90% and more). I hope to reduce the risk of funguses by a continous air stream.
There is still a lot of work to be done (i.e. I want to pave part of the outside on the greenhouse to place some plants there in summer time, also I want to install a underground water tank to collect rainwater.) Hope to be able to report about the further progress next year.
Hardy
I'm green with envy 
I wish I had so much space in my Greenhouse. 
](./images/smilies/eusa_wall.gif "Brick wall"){kind=small}