Sew a Quick Catamaran Trampoline

Step 3 Sew it to an Oversized Piece of Cloth

I scavenged some scraps of "Sunbrella" UV resistant cloth from a sailmaker's dumpster.
Boatyards and awning shops are other good dumpsters to watch.
I sewed some scraps together to make a big piece a few inches bigger than the halftramp on all sides. I used the "flat felled seam" which is the strong seam used to sew jeans.
If you start out with a big enough piece of cloth you won't have to mess with that.
Look for something synthetic and UV resistant that's as strong as canvas. If it's a porous mesh, that's even better, the wind won't have as much to push on when it's flipping you over.

Lay out the new piece of cloth on the ground.
Flip the old halftramp over and lay it on the new cloth.
That old tramp has already stretched and the new tramp is going to stretch.
So push the edges in so the new tramp will be smaller Trace around the edges of the old tramp so you'll know where they go.

I'm using a really nice industrial machine with a fat needle. So I'm sewing through the thick cloth.
If your machine is wimpy, you don't have to do that. In that case fold the new cloth around the old edge and sew your cloth to itself.