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Insulating under cab-over bed

lpaulcarter
Explorer
Explorer
We're finding the bed in our camper quite cold and I was thinking of adding some rigid insulation under it to try and make it less chilled. has anyone else tried this or have a better idea?
Paul
2005 GMC 2500HD 4x4 (Duramax/Allison)
2859 Bayliner Ciera Classic on a tandem axle Tuff Trailer
2002 Adventurer 810WS TC
17 REPLIES 17

kohldad
Explorer
Explorer
Have a piece of 3/4" foam under the bed and it made a little improvement. What made more of a difference was putting 1/2" foam board in the windows and 3/4 foam board in the roof vent. Still cold in the cab-over, but more tolerable. We also use a 0* oversized sleeping bag as a comforter and that was a HUGE improvement. Now I'm very warm during the night even when we let the camper go down to 55*.
2015 Ram 3500 4x4 Crew Cab SRW 6.4 Hemi LB 3.73 (12.4 hand calc avg mpg after 92,000 miles with camper)
2004 Lance 815 (prev: 2004 FW 35'; 1994 TT 30'; Tents)

lpaulcarter
Explorer
Explorer
Thanks everyone! I already have enough of the interlocking mats to cover the mattress area so I'm going to try them first on our next camping trip.
Paul
2005 GMC 2500HD 4x4 (Duramax/Allison)
2859 Bayliner Ciera Classic on a tandem axle Tuff Trailer
2002 Adventurer 810WS TC

brholt
Explorer II
Explorer II
A lot of places sell these interlocking "floor pads". For example:

interlocking foam mats

I bought a pack and easily installed them under the bed. They have worked well.

maddog348
Explorer
Explorer
Reflectix ~~ Many years ~~ Tent trailers ~ ClassC ~~ ClassA ~~ TCPopUp. Learned it from using a heat reflecting mattress pad about 40 years ago.

JM2ยข ~~ YMMV

billyray50
Explorer
Explorer
Camper8251 wrote:
I put 1" foam board under the mattress on mine. Seemed to help quite a bit also added a 12v heating blanket on it as well.

Used to do a lot of ski / camping up at Manning Park in BC till they raised the prices thru the roof.........



X2

rickjo
Explorer
Explorer
Reflectix x 4. Thin and effective. Still have headroom. Memory foam mattress in addition makes an efficient combination.
2019 F-350 4WD Crew Cab DRW 6.2 l gas engine (6500 lbs cargo capacity!)
2007 LanceMax 1181 loaded, King memory foam mattress (driver's side locker omitted).
"Leave the trail a little better than you found it."

gitpicker2009
Explorer
Explorer
Reflextix x3. I just added it last month and it made a huge difference. only 26 bucks for a roll big enough to cover the whole bed area under the mattress.

starcraft69
Explorer
Explorer
1" foam board did the trick for us Plus i cut some to fit the windows in the bed area. This worked really well for us and we camp a lot in the winter.
2007 chevy 2500 HD 6.0 longbed
2015 Eagle HT 28.5 5th wheel
tucker the fishing dog

jimh406
Explorer III
Explorer III
I used Reflectix as well. We wrapped up the sides where the mattress sits and also lined the nearby cabinets.

'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 DS, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Bags, Toyo M655 Gs, Curt front hitch, Energy Suspension bump stops.

NRA Life Member, CCA Life Member

Buzzcut1
Nomad II
Nomad II
I have a sheet of refletix under my mattress, it .works well and it is thin
2011 F350 6.7L Diesel 4x4 CrewCab longbed Dually, 2019 Lance 1062, Torqlift Talons, Fast Guns, upper and lower Stable Loads, Super Hitch, 48" Super Truss, Airlift loadlifter 5000 extreme airbags

narcodog
Explorer II
Explorer II
I used 3/8 foam board that has the foil on one side. Then I added an Electowarmth mattress pad, works well for me.

SidecarFlip
Explorer
Explorer
I used a sheet of the pink 1" underlayment foam board from the lumber yard. It was less than 15 bucks. Cut to size with a serrated knife.
2015 Backpack SS1500
1997 Ford 7.3 OBS 4x4 CC LB

lap527
Explorer
Explorer
1" foam egg crate under mattress worked for us.
2006 Dodge 3500 dually 4X4 / 2013 Livin Lite 10.0 TC /Torklift talons, fastguns, stableloads, superhitch, and truss/ towing a
14'V Nose Trailer when needed.

Old_Days
Explorer II
Explorer II
What we did was put a 1 inch foam pad on top of the mattress, that made a big difference. You can buy them at Walmart.