We live on a big piece of rural land and pretty much built everything the wrong way round. We built the house first, shed second and lately the greenhouse last. Next time, if there is one, I think we'll do it in the reverse order.
Because I like to think about things too much we of course did not buy a greenhouse kit, but designed it from scratch. This meant it took quite a few more years than it should have. But I reckon it is pretty cool!
It needs to be strong as it gets windy round here!
Ideally it would have a shade cloth part to raise plants and moderate heat as well as the classic plastic membrane section.
There would be some sort of barrier from the outside at soil level to stop weeds getting in and make it easy to mow eat up to from the outside without damaging the membrane and weed up to from the inside.
Like everything we've built I'd like it to last a long time and when it does die for as much as possible of the materials to be reusable in another project. Also if it can be built with recycled materials all the better.
No treated timber anywhere. No PVC.
Design decisions made and initial thoughts on if they were the right ones:
Initlly we banged some metal stakes into the ground and sat the frames on them thinking that would be enough to stop them sinking. As the soil got better in teh greenhouse though it got softer and the frames sank, we had to re-found them by digging down and sticking some concrete under them. Problem solved, shoudl have done that to start with.
Joining the frames together are lateral pipes the same as the frames joined with pressed pipe fittings
Along the length at the base we put roofing tin into the ground and wired it to the frames. The thinking is that prevent uplift and the thing flying away, give a good edge on the outside to mow to and lift the bed level up a bit to make it easy to work on. The tin does have paint on it which I guess will eventually make it's way into our food, we figured it's the best of available options and the actual amount of coating is very small and distributed over a long time period we'll be ok. Fingers crossed.
More pictures coming soon now it's been up for almost a whole year.