As food prices rise dramatically 1 and we can not be sure what additives, pesticides and conservators we get in supermarket vegetables and fruit, we decided to build greenhouse. I hope, it will give vegetables all year long despite the harsh winter conditions.
Our first idea was geodesic greenhouse (biodome) made of wood frame, covered with lexan cell panels. I made some calculations for biodome 7 m diameter (38 m2) and it will cost around 4000€ to build it completely. That’s was too much money to spend.
Next we found a greenhouse made in Slovenia, with nice characteristics and affordable price. Alpi 2/3. But we want more insulation than 4.5 or 6mm lexan panels, so we can grow food all year long.
So we came along “bolivian solar greenhouse”. It have steep south side to catch winter sun, insulated north side and large water tank to store heat during winter nights. All good features of geodesic greenhouse. What is the difference then? Price! It will cost around half. There won’t be almost any waste of costly lexan plates and there won’t be any problems with sealing roof windows, because i can use any standard window on sides.
There will be windows next to ground on south side and windows next to ceiling on north side + roof window. This will provide good air circulation during summer and prevent overheating. I also tend to install Misting Cooling System if needed.
1.12.2013: I did some modeling and winter sun simulation. Next step will be adjusting dimensions to reduce waste of building materials.
Read more here: GREENHOUSE DESIGN, PART 1