[KeithInUpstateNY]

I used Reflectix to skirt my cabin years ago and it has held up remarkably well. I just put inexpensive tarps over it to block the sun damage, which also created a second air space. The two foot wide roll was wide enough to have a "flange" on the ground that I weighed down with landscape timbers. Not the cheapest solution initially, but it made a huge difference in the floor temp and it's been in place at least 15 years. I expected to have to replace it long before now.