Made a DIY Hex 12 using Silpoly 1.6 in Moroccan Blue.
Modified the dimensions a bit for a shallower cat cut, and a couple of inches extra on the overall tarp.
Opted for radial reinforcement patches, grosgrain tieouts, flat felled ridge seam, and a rolled hem perimeter.
I cut the drops extra long to make grizz beak style doors in the future from the leftovers.
This was a challenging project, due to the slippery nature of the silpoly and the cat cuts. The reward is well worth it and I learned a great deal on this project. Clips were my best friend keeping the material from walking. This is a durable tarp and while it is a little heavier, it should last for years.
RBTR gave me all the instruction I needed to get started and I made revisions using the help of the hammockforums.net peoples.
Hex 12 Tarp:
1. Layout fabric doubled over. 2. Mark hex shape. Cut it out. Both sides at one time. 3. Sew ridgeline seam. (3 step flat felled shown on instr.) 4. Lay the halves doubled over again and mark cat-cut lines using thin wood strips or the rbtr template. 5. Cut the cat-cuts out for both layers at the same time. (use clips to hold the layers together) 6. Cut out and glue reinforcement patches to tarp body. 7. Make up all the tieouts using 1/2 inch grosgrain and beastie d's with cord locks on the tieouts and 3/4 inch grosgrain with triangles at the ridge line. 8. Sew the perimeter hem of the entire tarp. 9. Attach the premade tieouts to the tarp and stitch the reinforcement patches. 10. Seal seams. 11. Hang it.
Required Materials:
1.6 Silpoly Moroccan Blue Mara 70 Thread Grey HyperD300 Blaze orange ( from Diy starter kit) 1/2 inch grosgrain 3/4 inch grosgrain 1/2 inch Beastie D's 1/2 inch Lineloc 3's 3/4 inch Tri-Rings Sil net seam sealer