I've been wanting to make a tarp and I had an idea. Why not seam it on the diagonal and save on sil?
All the directions and patterns I've seen either seam down the ridge or across the middle. Here's my thought:
My pattern (yep, I drew it on paper!) gives me a tarp that's approximately 12' long and 7' across, (6' long at the edge.)
If you seam it this way you can get the whole length out of about 15' of fabric.
All the patterns I've seen call for 8-9+ yds, I think I can do this with 5 yds. This shape is just a rough idea, I didn't do any math to optimize it, but the width is easily done with 60" fabric.
What do you think?
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