Canvas Geteld
Some time ago I decided that having a tent would be a good idea, or more precisely that making a tent would be a good idea. This tent is in fact a practice run for the woollen Viking A-frame that I have plans (and fabric) to make. The reason for the practice is that I've never made a tent before, and the wool was a lucky find which I wouldn't want to have to try to replace.
After much calculation (it was a while ago, I can't even remember what the final measurements were, I've just got the bits of fabric cut out), the fabric was ordered. It is white Sunforger 36" wide, and was the cheapest source of waterproofed fabric that I could reliably find (after all, I don't want to spend ridiculous amounts of time sewing a tent to find out that the fabric is no good). After some amount of time the canvas arrived, and I got to see how heavy it was. I also went out and bought a roll of heavy linen thread.
Maybe this is where I should mention that I am planning to handsew the entire thing..
Seam Techniques
The original plan was to do a run and fell technique (as shown here). After sewing the running stitch seams on both ends I discovered that I physically couldn't get the needle with thread through that many layers of canvas. Next experiment was felling with herringbone stitch, which didn't sit flat very nicely. Third attempt was folding the edges of the seam in (Hedeby pseudo-French seam), and then stitching that flat - both steps here using a finer linen thread. After trying this and finding it tedious having an extra row of stitching to do, I realised that I hadn't tried the original seam plan using the thinner thread for felling. On trying it, I was very pleased to discover it worked.