Coming from a fiberglass Cap with a carpet liner.....
I noticed the inside of a SmartCap is just metal. Anyone insulate or otherwise "coat" the interior?
Needed?
Just as an update to this. I never insulated the roof. I was doing it mostly to reduce interior heat from the sun.
I applied a white wrap to the top panel of the topper before I assembled it. This was cheap (about $100) and quick (about an hour) so I thought I'd try this first.
It's worked beyond my wildest expectations. So I haven't bothered with insulation.
I haul my dog around in the back of my truck, and in the winter have put an insulated cover over my Ruff Land kennel to help keep him warm.