Thermal barrier?

[EddieExpedition]

I’m thinking about building a heat shield of sorts under the rear cargo area on my blazer. Since we have the camper on there, it’s difficult to do much interior insulation so I thought something underneath might help.

Has anyone done this? I have a large sheet of aluminum I can use. Cut it to fit between the frame rails and bolt to the underside supports of the cargo area. Hopefully reflect a bunch of road heat?

 

[kennyw]

Look up lizardskin. They have both a spray on thermal barrier and sound control. Both can be sprayed on the interior (or exterior if you can prep it properly).

Search

next.henkel-adhesives.com

 

[HankScorpio]

I had real hot floor temps with just Siless foil backed sound deadener and carpet. (No pad) I did exhaust wrap and it helped a ton. Still hot though, 454 in mine. I am thinking of trying a heat shield at the muffler too.

 

[EddieExpedition]

I’m familiar with the lizard skin. The prep would be tough on the underside. I think I’m just going to try the heat shield idea since it’s not permanent if it doesn’t work out.

 

[Blue85]

Are you talking about the heat from driving or just while camping? I think most of the heat comes from the exhaust and the transmission. The tranny might not be an issue for the camper, but adding a heat shield between the exhaust and the floor could help a lot, or exhaust wrap.

Is it really so hard to insulate the interior?

 

[EddieExpedition]

Mostly while driving. I figured road heat, trans and exhaust all heat up that area.

 

[vegasblazer90]

Prob ten or so years back I covered the doors, cab roof, floors and rear sides with dynamat. The only thing I didn’t cover was under the camper and the back tailgate(only because it wouldn’t look good since there isn’t anything to cover the sound deadner)
It made a huge improvement

 

[6872xtc]

I think that it's worth a try, since it would only cost you time. I would try to put some small spacers at the attachment points to give some air flow possibility above it and to lessen heat transfer.
If it makes a noticeable difference, you could pull it back out and cover it with an insulation.
I put DEI tunnel shield on the underneath of my transmission tunnel of my Jimmy after @mrk5 used it with good results and I am pleased with the difference as well. I didn't have experience with this engine, transmission and exhaust combo beforehand, but when compared to an older Square that I had, it helped a decent amount. I can hold my hand on the transfer case shifters easily after long day in Moab since the A/C can keep it comfortable, even with the windows down. The floor has jute insulation on top as well and the floor doesn't get hot.

So I used it in the trans tunnel of my '01. I had no beforehand to compare on that one.