Wet Foam Mattress

Submitted: Sunday, Apr 12, 2009 at 21:40
ThreadID: 67787 Views:6594 Replies:7 FollowUps:4
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I am an avid camper trailer owner and experiencing problems with our foam mattress. When my partner and I get up in a morning, we discover that the underneath of the mattress if often damp. Without going to the expense of buying an inner spring mattress, has anyone else experienced this problem and if so how have they overcome it??
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Reply By: Member - JohnR (Vic) - Sunday, Apr 12, 2009 at 22:35

Sunday, Apr 12, 2009 at 22:35
Have heard of some that use a sort of under mattress heater. Never had the problem myself but we have an innerspring

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AnswerID: 359329

Reply By: PradOz - Sunday, Apr 12, 2009 at 23:52

Sunday, Apr 12, 2009 at 23:52
hi - not sure if this product - HYPERVENT - is still around or its cost or effectiveness (i have never needed to use it) i have seen it advertised many times. try: www.schionningdesigns.com.au (schionning marine) or

1800 008 818
sydney 02 95883400
gosford 02 4325 5351
bris 07 3281 1999
darwin 0417 180 978
tas 03 6435 2643
tas 03 6273 4666

above details out of an advertisement in a caravan magazine "to stop condensation under mattresses" and simply is cut with scissors to size and slides under mattress.

to me its a bit like an open weave, mesh type product. maybe the foam floor mats with little square cutouts in them may work, but the openings maybe too far between or too few. worth a try if you have some - may increase comfort a tad with the foam if they do work??

i have read many home remedies and you can often see some on the many van forums. i have even heard that newspaper laid out under the mattress works but i cannot vouch for it as i never have needed to solve the problem. maybe thats because i always leave ventilation at night each end of camper, even if its a small amount
AnswerID: 359338

Follow Up By: PradOz - Sunday, Apr 12, 2009 at 23:59

Sunday, Apr 12, 2009 at 23:59
thought i would check above web site but its too confusing. try this link instead as it answers your problem:hypervent

also has good photos of product etc. cheers...
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Follow Up By: PradOz - Monday, Apr 13, 2009 at 00:07

Monday, Apr 13, 2009 at 00:07
you got me looking into it now :\

anyway i notice it is for sale at Camec so maybe worthwile checking them out either physically or over internet via their web site. you can order camec over the net if need be.

the hypervent site gives a pretty good account of the problem and solution. if you are handy i reckon you could come up with your own solution by improvising something you have or can get cheaper??
FollowupID: 627326

Follow Up By: sj2649 - Monday, Apr 13, 2009 at 07:44

Monday, Apr 13, 2009 at 07:44
I see that they also have stockists in Tassie, thank you for your help, I will go and see it in person.
FollowupID: 627331

Reply By: KiwiAngler - Monday, Apr 13, 2009 at 00:03

Monday, Apr 13, 2009 at 00:03
Not an uncommon thing to see - the warmth from your body cuases condensation to occur when it hits a colder surface

I have found the easiest way to stop the condensation from causing a problem is to put a layer of closed cell PE foam (blue hikers mat) under the foam mattress.

That way the condensation forms between the PE foam and the colder surface and because the PE foam is closed cell it prevents it from coming in contact with your mattress
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AnswerID: 359339

Reply By: Member - Roundie (N.S.W.) - Monday, Apr 13, 2009 at 08:32

Monday, Apr 13, 2009 at 08:32
Clark Rubber carry a product for placing under foam mattresses. I'm not sure of the name, but it is an open weave nylon mat approx 15mm in thickness and works beautifully. We use it under the foam mattress in our van and it never gets damp.
AnswerID: 359350

Reply By: Rangiephil - Monday, Apr 13, 2009 at 10:07

Monday, Apr 13, 2009 at 10:07
Well the cheapest way is to just fold the mattress in half after you get up in the morning. It only takes an hour or so to dry.

I have a 4 inch foam mattress with a 1 inch cell overlay, so the hypervent at 1 inch will raise my total height too much for my camper, which is designed for a 4 inch foam mattress.

Just be aware of this factor before you spend money on things that will add height.
Regards Philip A

AnswerID: 359352

Reply By: Member - Oldbaz. NSW. - Monday, Apr 13, 2009 at 10:16

Monday, Apr 13, 2009 at 10:16
We use Shade Cloth ,doubled under mattress, & have no problems. Also use same as ground sheet under camper floor.
Less moisture & cleaner floor when packing up. No doubt other
suggestions work as well, but this is cheap & works for us.
AnswerID: 359356

Reply By: cito - Monday, Apr 13, 2009 at 16:25

Monday, Apr 13, 2009 at 16:25
We use a mesh underlay from EMP Industries (www.empind.com.au) and have had no trouble since getting it. I recommend it. Go to the site and search for 'mattress'.

AnswerID: 359386

Follow Up By: LeanneW - Tuesday, Apr 14, 2009 at 11:54

Tuesday, Apr 14, 2009 at 11:54
Ditto for EMP underlay.
On their website, click on the 'other protection' box. The underlay should come up then.

FollowupID: 627439

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