Hello,
I have reflective barrier to help with insulation and moisture. I was planning to do it myself, but I've had recent issues with my back.
I was going to do some in the attic crawlspace (this just needs to be laid out on top of the insulation. The more time-consuming will be under the house to staple it up onto the floor joists. This is hopefully going to reduce moisture issues and improve comfort. Both are just uncomfortable and awkward in the best of times. With having some back issues it feels impossible.