Hello all you DIY'ers out there. I am working on a top secret project that involves sandwiching a 3/8" thick piece of closed cell foam between two sheets of ripstop. The foam pad inside will be expected to be rolled up but not super tight. I anticipate that there will be wrinkling of fabric on the inside of the roll, and the outside will be taut. Maybe too tight! This is where I need some math help. I know when you roll things up the outer side is longer than the inner side due to thickness of material. What I don't know is how to anticipate the extra length required for the sandwich material if I don't want the fabric to be ripped apart or cause buckling or yanking on the stitches prematurely. I need to give extra room I am pretty sure. Can someone help me out with how much?
thanks everybody! I love this board!
Bookmarks