I have the storm door from a older hexamid

I sold the tent but still have this piece of 0.51 osy cuben. I recently got the idea to make this into a rain kilt. Even with its odd shape it seems like it could do the job, covering to just below my knees for the most part. Because it is not symmetrical, I am imagining that I would keep the longest side toward the rain as necessary.
I have some ideas about how I will put this together. My questions stem from not having worked much with any fabric before. My myog list using soft materials consists of a small pack lid sort of container mad from tyvek which I made with scissors, tyvek, tape and a bit of adhesive for the zipper. Note no sewing. While I have used a needle and thread before, I don’t know how to use a sewing machine and not in a big hurry to learn how quite yet.
Enough background, here it goes. I am envisioning this quilt as being held to my waist via velcro. Just wrap and have an overlap of around 8 inches. the bottom of the kilt will be about 12 inches longer than the top, so it is a bit of a cone. Wondering about cutting the cuben. It is presently hemmed, and I am wondering if that in necessary? If so is sewing necessary, or would cuben tape be sufficient (albeit a bit heavier likely?)
Tips and suggestions welcomed, not cutting material until I am sure about it. I have cut a version out of paper to use as a template for the real deal.
thanks, Matt



