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Old 02-14-2015, 07:57 AM   #71
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Condensation forms on a cold surface. Since the cabinets are in the warm space the condensate does not form.
Preventing the interior surface of the board under the mattress from getting cold is the answer. Air circulation will also prevent condensation build up.
Insulating the space under the bed and providing warm air flow will also help.

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Old 02-16-2015, 03:19 PM   #72
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Bed damp

The best answer for us was to reduce the humidity in the air we use a dehumidifier and also use a pouch of damp rid under the bed everything stays very dry inside the entire camper. Best of luck Rand

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Old 02-16-2015, 09:36 PM   #73
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hmmm. how about a 'mattress pad heater' under the mattress?
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Old 02-17-2015, 10:02 AM   #74
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Then the moisture from sweat is on top the mattress?
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Old 02-17-2015, 12:04 PM   #75
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Equalizing air temperature under the bed to interior air temperature is a solution, vapor barriers and insulating pads are pretty much Band-aids. A fan circulating air into the area, or opening the area enough to allow natural equalization of air temperatures, along with ensuring exterior door seals are tight, ought to eliminate the dew point condition that is causing the moisture to form.
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Old 04-23-2015, 11:33 AM   #76
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After traveling roughly 8,000 miles in 8 weeks with Rocinante and camping in temperatures as low as the mid-20's (F) with snow outside and plenty of condensation on the windows, we can happily report that our bed sandwich of a layer of Reflectix under a layer of Hypervent under the mattress successfully prevented condensation under there. Our experiment was a success in these temperature ranges.

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