Several months ago I bought a large canvas tarp from an auction house. It cost the equivalent of five pounds and was listed in the auction as a trampoline
It's an old natural canvas truck tarp measuring 16x18'
The canvas is in pretty good condition for its age. It has been used for a painting drop cloth at some point as it has paint spots and marks on it but nothing too bad. The fabric seems sound and has a good tight weave, which is the real thing to look for.
After thinking about it for too long, I decided to start my wall tent build. I laid it out in the back yard and began to mark out the pieces. I found this picture from an old scout book on the internet and used it as a guide.
My final design was 7x9x7'. All the conversions from imperial to metric and the size increase had my little brain in a muddle, so I pegged and strung out the end shape as a reference.
The string came in very handy as it meant that I could lay the panels to see if they were right. Marking and cutting on spongey grass made things a a little difficult and I would recommend to anyone trying this kind of thing to find some smooth hard surface to mark and cut the panels.
I'm using a 50 year old singer 99k to sew all my MYOG stuff but it seemed to handle the thick canvas well, even a couple of 8 layer corners.
Thanks to the simple scout plan it went pretty straight forward and I now have a traditional looking wall tent. It's mid winter here now so I'm looking forward to a winter camp out. All that is left to do is to fit the stove jack and some cosy times await.