What You'll Need
- One 10.5-by-10.5-foot square of 60- or 63-inch silicon-impregnated nylon, aka silnylon ($4-$11/yard; owfinc.com) Can't find these dimensions? See our work-around at backpacker.com/tarp.
- Nylon thread ($2)
- 1/2-inch grommet tool and grommets ($10)
- 2.5 feet of 1.5-inch-wide flat nylon webbing (about $0.40/foot)
- 2 Eureka! Guyline Kits ($7 each)
- 1 tube SilFix glue ($6)
1. Lay the nylon square matte-side-up on the floor. Apply a spot of glue every 6 inches along each edge.
2. Run a 10-foot line of nylon rope from the guyline kit down one edge. Fold the tarp's edge over a quarter inch so it covers the rope and stick it to the glue. Repeat for all sides.
3. Using a sewing machine, sew 1/8-inch stitches with an 1/8-inch seam, back-tacking (reversing and re-stitching the line at least three stitches in length) in both directions at every corner.
4. Cut ten 3-inch-long pieces of webbing. Cauterize the rough ends with a lighter.
5. To make grommet patches: Fold sections of webbing in half and place them over each tarp corner, with a flap above and below, sandwich-style. Sew webbing onto corners, back-tacking each edge.
6. Add another patch to one side of the tarp at the 5-foot mark. Repeat on the opposite edge. Add patches to the 2.5-foot and 7.5-foot marks on the remaining edges. (Use the sides with two patches to stake tarp to the ground.)
7. Punch a grommet through each patch.
Final cost: $35-$100
Final weight: 1 lb.
When making tarps and other ultralight gear, check Wal-Mart bargain bins for rolls of silnylon at $1/yard.