Before getting the greenhouse I asked for advice on the forum. As a result, got some stout planks from Jewsons and some 2 ft long 2x2" stakes (they cut the stakes for free, just charge you for the wood) for piles. Slapped on organic preservative. Pounded the stakes in at corners and along the length, drilled and screwed the planks into them, using spirit level to make sure they were level. With hindsight, 4 x 4" stakes would have been better.
Here is a similar kit ready for a new shed (just need to persuade No.1 son to put it up for me):
And here is the greenhouse standing on the foundations, screwed down since it walked off in the March winds :o :P
You can see the corners and the way the planks are centred on the actual dimensions of the greenhouse:
After a lot of thought and conflicting advice, I laid woven black plastic on the greenhouse floor. With so much weeding to do outside on the plot, I wanted as little labour as possible inside the greenhouse! If I decide another year to get digging inside, the weeds will have gone.
Hope this helps! BTW putting up a second hand greenhouse is a formidable task, you need lots of patience and some good helpers. If you can get the frame up and screwed down to the foundations in one go, you can glaze at your leisure. Good luck mc, you won't regret it :)
