1. How big of a winter tarp could you reasonably make with a 59" width fabric? I'm interested in the group buy, but wasn't planning on making a tarp until after I have completed a quilt project. Oh, and what color will it be?

2. Originally Posted by WarmSoda
How big of a winter tarp could you reasonably make with a 59" width fabric? I'm interested in the group buy, but wasn't planning on making a tarp until after I have completed a quilt project. Oh, and what color will it be?
You will probably loose 2" to ridgeline seam and rolled hem on each side of the tarp, leaving you with 114" total width. Brandon's tarps made from the same fabric are 117" wide, but I don't know how he does the seams. The color is a light grey.

3. So, if a person wanted 114 inches by 156 inches, one would need to purchase 9 yards? (59"-2" for ridgeline, X2 for 114 wide, and 13 feet length=312 ", or 8.67 yards)

4. Originally Posted by OldnSlow
So, if a person wanted 114 inches by 156 inches, one would need to purchase 9 yards? (59"-2" for ridgeline, X2 for 114 wide, and 13 feet length=312 ", or 8.67 yards)
I think that's right. That would make a big tarp!

5. Originally Posted by OldnSlow
So, if a person wanted 114 inches by 156 inches, one would need to purchase 9 yards? (59"-2" for ridgeline, X2 for 114 wide, and 13 feet length=312 ", or 8.67 yards)
Wouldn't it be 59 x 2 = 118 - 2 for seams = 116? I guess Brandon is pretty good with seams and doesn't need a half inch on each end and a full inch on the ridgeline seam (half on each side)

6. Originally Posted by WarmSoda
Wouldn't it be 59 x 2 = 118 - 2 for seams = 116? I guess Brandon is pretty good with seams and doesn't need a half inch on each end and a full inch on the ridgeline seam (half on each side)
If you're binding the tarp with gross grain like OES then you can get by with a single fold for the hemming, so more like 3/8" on the hem and 1" on ridgeline. (NOTE: I do not know what kind of folding, if any, OES does under the gg binding - I'm just mentioning that you could gain a fraction of an inch if you're going to bind it).

Honestly, I wouldn't sweat that 1" or 2". Two widths of 59", no matter your seam allowance, is a large tarp.

7. Brandon didn't use grosgrain edge trim on his spinn tarps, it wasn't necessary for a strong edge. Saves weight and materials to use a rolled hem. I don't know if a tarp with as deep of cat cuts as a MacCat has would work as well w/o the edging on the spinn material. Brandon's tarps also have a binding along the ridgeline, but am not sure how the pieces are folded together, I would think it would save a fraction of an inch by using the binding strip, and still be stronger.

8. I would like to, but so far what I've read indicates this material isn't very durable. Anyone tested otherwise?

9. Originally Posted by leepingreenlizards
I would like to, but so far what I've read indicates this material isn't very durable. Anyone tested otherwise?
I think Cannibal posted some story of a huge tree limb crashing into his SpinnUL tarp without damage. I have no experience with SpinnUL, so I don't really know about durability first hand.

10. I could be up for a couple yards to make beaks and stuff sacks out of.