Looking for some advice on Tyvek tarp construction. I recently found a 27 ft. length of Tyvek in my garage. For some reason it was cut irregularly on one side (maybe it was a 10' wide roll, but the piece is effectively 55" to 56" inches wide.
So here's my idea:
1. I'm looking for a winter tarp pattern and the Winter Dream looks like it might work with modifications:
First off, I don't think Tyvek needs a cat cut so I'll skip that. Second, my tarp will end up 110" wide rather than 120", so there's five inches less coverage on each side. It's still plenty big with lots of coverage, especially since I'm skipping the cat cut.
Can anyone suggest a better pattern? I really want doors.
2. I planned on overlaying the two lengths of Tyvek about 2" at the ridgeline, then using Tyvek tape to tape the two pieces together. So now my tarp width is down to 106" or seven inches shorter on each side. Does anyone think I don't need the overlay and can just tape the two seams together?
3. If I really REALLY wanted a 10' wide tarp, I do have an additional 7' x 7' piece of Tyvek that I could cut into seven inch strips, then tape them to increase the width. However, I don't particularly like this idea.
4. For tie-outs, I was going to use 1.75 mm Zing-It loops. Since I was planning on reinforcing the tie-out areas anyway, I thought, why not just bury Zing-It loops between the reinforcing tape and the Tyvek? To increase resistance, I thought of putting knots in the Zing-It so the tape has something to grab onto rather than just the slick Zing-It.
I considered using grosgrain loops, but the Zing-It is plenty strong and much more lightweight.
5. I plan two pull-outs per side, again using knotted Zing-It with Tyvek tape reinforcement. Tarp guy lines could attach to the pull-outs and tie-outs with a simple larkshead knot.
6. Since it's a winter tarp, I'm probably not going to paint it or dye it. This is strictly for winter use.
7. Much as I hate the tarp laying on the ridgeline, I think it's too complicated to put external loops on the ridgeline to suspend the tarp below the ridgeline. The Tyvek should be plenty robust to take a little friction rubbing on the ridgeline. The center ridgeline will have a Zing-It loop at each end with a prusik for tensioning.
Any suggestions from HF before I embark on this project?