Good Sam Club Open Roads Forum: Moisture behind mattress? (Cold caught us)
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 > Moisture behind mattress? (Cold caught us)

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PartyOf Five

Wheaton, IL

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Posted: 04/01/21 08:47am Link  |  Quote  |  Print  |  Notify Moderator

We've traveled in our C class for a few years but haven't been in a situation where it's cold for multiple days. This morning I discovered moisture behind the mattress, likely because we were in 70° yesterday and 40° today.

It will continue to be cold for the next few days so what do the experts here suggest I do (winterizing the water system today). I'm thinking to leave the roof vent cracked open while the furnace heats us overnight so any moisture can leave.

Thanks.


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dhull

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Posted: 04/01/21 09:04am Link  |  Quote  |  Print  |  Notify Moderator

You need hypervent aire-flow moisture barrier. Worked for us.

wopachop

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Posted: 04/01/21 10:02am Link  |  Quote  |  Print  |  Notify Moderator

Have you tried praying? If that doesnt work i would continue to look towards science for the answer.

joelc

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Posted: 04/01/21 11:02am Link  |  Quote  |  Print  |  Notify Moderator

Pull your mattress away from the wall about an inch so you have air flow behind it.

Lwiddis

June Lake area, California

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Posted: 04/01/21 11:05am Link  |  Quote  |  Print  |  Notify Moderator

"Pull your mattress away from the wall about an inch so you have air flow behind it." x2 and check the area carefully daily.


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smthbros

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Posted: 04/01/21 11:16am Link  |  Quote  |  Print  |  Notify Moderator

If you don't mind input from a non-expert, I would say you are on the right track. As joelc pointed out, the mattress insulates the exterior surface allowing it to be cooler, yet it provides no vapor barrier. My concern, since there may be 5 people in the rv, cracking the roof vent may be inadequate. I think a couple inches open on the vent and perhaps a window open as well.

DrewE

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Posted: 04/01/21 11:43am Link  |  Quote  |  Print  |  Notify Moderator

It may be well-nigh unavoidable. If the inside of the exterior wall is cooler than the dew point of the air in the RV, you're going to get condensation; so the only options are to reduce the humidity of the air inside (and that may make it a lot drier than you care to be breathing) or raise the temperature of the wall, say by moving the mattress aside for awhile...or going somewhere warmer.

If it were me, I'd probably just move the mattress aside during the day to give the area a chance to warm up and dry up/air out, and not worry too much about it beyond that. Obviously taking reasonable steps to control the inside humidity is also a good idea, such as cracking a roof vent or two. Cooking, breathing, and showering all add a good bit of moisture to the air, and it's rather inconvenient to live without any of them, to say the least.





ssthrd

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Posted: 04/01/21 12:55pm Link  |  Quote  |  Print  |  Notify Moderator

"I'm thinking to leave the roof vent cracked open while the furnace heats us overnight so any moisture can leave."

Yes, that's a great first step. Good ventilation along with heat and a small dehumidifier will work wonders for condensation problems.

Good suggestions from everyone above.


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wing_zealot

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Posted: 04/04/21 06:29am Link  |  Quote  |  Print  |  Notify Moderator

Turn the AC on so it runs every once in a while.

rhagfo

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Posted: 04/04/21 07:28am Link  |  Quote  |  Print  |  Notify Moderator

joelc wrote:

Pull your mattress away from the wall about an inch so you have air flow behind it.


We full time in the PNW, I placed two about 10" pieces of 2X4 vertically at the head it work very well.


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