Keep my garage moisture free

Do you have this insulation installed in a building like mine? Did you use a vapor barrier, and did you cover it with anything after installation?
No. I bought a house with an existing small(approx 20 x24) pole building/barn. It had fiberglass insulation encapsulated in a fairly heavy vinyl sleeve. It looks like it was inserted prior to metal sheathing installation. Unfortunately the heavy vinyl is not impervious to birds and rodents. so that's not good.
My experience with the rock wool is from restoring a house which I owned,, that had had a fire, which destroyed the kitchen and had extensive smoke damage thruout the rest of the house. That was nearly 10 yrs ago, and I've been very happy with the insulation performance since then.