fulltimin wrote:



One of the things I discovered this summer was, once all the insulation was removed from the ceiling, walls, and floor, it was actually MUCH cooler, and easier to keep cool, even during the hot, sunny days.

That kind of twisted my thinking a little, and I did do some more research on insulation.

Turns out, that, with a wall or ceiling/roof with no air space toward the outside, that the entire wall will eventually heat up, and radiate heat or cold directly through the wall or roof.

Adding an airspace just under the outside skin, with ventilation, now removes the radiation effect.

I used to notice that with the roof in tact, when the sun was on it, I could just feel the heat radiating off of the inside of the ceiling. Once the insulation was gone, there was some radiating, but nothing like it was with the insulation up there. Go figure.

Bruce Brown wrote:


When I rebuilt the TT I wanted to keep the weight down as well as make it less apt hold water if it ever did leak again. With that in mind I used Reflectix insulation. Everything I read on it said you basically doubled your insulation value if you left an air gap. In order to get that air gap I cut strips of wood so I could install the Reflectix centered on the 2x2s.

The first trip we made with it was an elk hunt in Colorado. We took a small electric heater as back up as I had no idea how hard it would be to heat - would the furnace keep up? Many nights it dropped into the low 20s, the electric heater alone took care of most of our heat requirements. I was impressed.

You may want to look into doing something along the same lines. It's cheap, light, easy to install, and based on what we saw I'd also say it was effective.

Rwake901 wrote:

WOW I just looked at this post for the first time. You’ve got a long road ahead of you rebuilding your RV and a lot more time and energy than I have. lol Good luck with it. I definitely would have quit a long time ago.

fulltimin wrote:



Are you saying that the only insulation you put in was Reflectix, centered in the wall and roof with close to a 3/4" air space on each side of the insulation?