So how'd it do?
Has been hanging for 4-5 days through several storms. I've slept under it once. Just had a big blow go through this afternoon and I ran out to test the setup. It was blowing and raining hard and I didn't get wet and the tarp shows no signs of stress.
That is a really nice looking tarp. I like the tie-out option you finally chose. I will have to give this a try when I am finally able to start working on my tarp again.
It looks like most of the cottage tarp makers use reinforced patches, but this seems to make the most sense, and would actually spread the load in the right places...I will definitely keep this in mind when I make my next tarp!
If you're adding ties to a long straight edge, a patch is likely more appropriate. In my mind, in that scenario, (along a straight edge,) it's the first few stitches that would get the stress if you only sewed along the hem. In a corner, the pull should be in the direction of the hem, more or less.
(then again things go on "in my mind" that have nothing to do with reality...so there's that...)
I was just debating this same question for my first DIY tarp when my Google-Fu found this.
I think I will do the #3 edge sewn style as well. Seems like a simpler method for this simple guy.
Bear in mind that he used PU coated Nylon not Silnylon. He also did it over a triple thick hem. PU is heavier, stronger, and tends to stretch less. If you are using Sil you might want to think reinforcement patches or at least do the same wide thicker hem.
Free advice worth what you paid for it. ;-)