No Insulation in Enclosed Bottom

horton333 wrote:
Hi,
So working on a wiring issue that required removing a service plate I was a bit surprised to find there is no insulation under the plastized cardboard that encloses the tanks and the bottom of the trailer, at least not back as far as the water tank. They have taken some care to seal out air, with foam sealing to the frame and where stuff cuts through, I take it the theory is just blast a lot of hot air in, forget efficiency.
Is no insulation normal, or is mine just cheap, or do they come in various levels of insulation?
Comments please?

Tracer Air 238.

That is because the ACTUAL insulation is tucked inside the floor.

Typical floor construction is a bit like a ice cream sandwich.

There is a bottom layer of thin wood paneling.

2x2s are arranged across the bottom layer of paneling.

Then solid foam insulation is fit between the 2x2s then finally 3/8"-1/2" plywood subfloor or can also be MDF or strand board (IE "chip board) layer. All layers are stapled and glued together.

This type of a floor is much stronger bet yet lighter weight than if you used a 3/4" thick plywood floor and it gives you some R value in insulation. Also by creating the sandwich you are protecting the insulation from rodents and such.