An aluminum topper can get both very cold and very hot. Insulation might be a necessity.
(I decided on not insulating the topper. Just got a swell sleeping bag set up and a nice wool sweater. )
At the cheaprvliving forum on insulation I found this interesting tidbit.
This “EZ-COOL” sounds almost too good to be true ..(apparently so. The company no longer exists and Harbor Freight doesn’t have it.)
A 4’x10′ roll weighs less than 2 lbs. It takes about 2 rolls for a regular cab pickup, 3 for sedans, and 4 for most wagons and vans. That means you will add less than 8 lbs when installing it in the largest vehicle.
Q: How thick is this insulation?
A: This insulation is approximately 3/16″ thick.
Q: What is the R Value?
A: Down = 13 Horizontal = 9.6 Up = 8.1 This is better than 2″ of fiberglass insulation.
That seems to be a great insulation for little space. I would like to do the whole interior of the topper. It would be an added cost of $200, not counting freight. It is on the luxury list for the present. I may not want or need it. The place to obtain this miracle automotive insulation is Harbor Freight. That could be a great first drive. This product seems to be so much better than Reflectix, and the same amount of labor involved.
Is it too good to be true? Yes.