I got the basic info on the web, found the most suitable area on my site and started building. My glass was free and huge! and between that constraint and the site shape I ended up making something quite different! In using it, I have found out that a considerable amount of direct sunlight in summer comes from NORTH of the east west line!
So a typical south facing lean to greenhouse will fail to collect this light!
Perhaps you can learn from my successes and mistakes and the tools I found online while trying to explain what went right.
This explains what I did, why I did it and why it works so well.
Information has come through during this project that makes a compelling case for lean away greenhouses.
Step 1: Why is it lean away?
The only thing I bought for this greenhouse was the silicone to put the glass in frames and the screws to hold the wood together. Everything else, I had on site and was determined to use. The glass was 4 ft by 6 ft, 5 sheets and my wood meant that I could do 2 large frames and one small one. The glass was so heavy that I was afraid if I leaned the big pieces, it could fall over as i worked with it. It had the unusual shape so that it lined up with the fence at the side. Once I put it on blocks to keep it off the soil, it was pretty high at the front. Lean away was the only solution.!
Step 2: I had a few unusual construction methods.
Biggest new thing I tried was buckets in the ground for some of the posts. This is mainly to prevent termines and water from destroying them. When i am happy with placement, I can add concrete or roadbase in the buckets to keep everything steady.