Under mattress treatment pj

Put HyperVent under the mattress.

We use a sleep number air mattress about 8 inches thick. I don't see how moisture could get through the 8 inch air chamber to the bottom but will keep an eye on it.

In one vehicle I fitted a false floor made from screen door security mesh supported up off the base on thin spacers.

In the bigfoot we were told of a bit of a problem by the previous owners. Memory foam mattress of some sort. During the day we just slide a pillow or similar under the end of the mattress and that provides all the ventilation needed to keep it from getting to be a problem.

pjay9 wrote:

Photomike wrote:
I went with two mattresses, love the loft and no moisture getting through to the base.

So how thick is that? What about sitting up head room?

6 - 8" and with or without the extra mattress on my camper there was not enough room for sitting up.

I've checked several times under our mattress and never had an issue with moisture forming. We have a cheaper mattress that I think has poor fill in it and springs. Air seems to flow through it easily. We have a 3" memory foam topper on it and that works great for comfort.
What I have thought of doing is fitting and placing a heavy 3/4" grade of cedar fence lattice under the mattress that would provide for ventilation and decent uniform stable support under the mattress.

bb...have a memfoam mattress and have had no wet issues, yes there is a brandnew platform with new wood and insulation. My thinking is as before more insulation as you have mentioned. I may put down a 1/2 foil faced board and some bubble and cover the lot with batting and nice fabric. I was just wondering if anyone had any great light to shed. THX for your confirming input!

Photomike wrote:
I went with two mattresses, love the loft and no moisture getting through to the base.

So how thick is that? What about sitting up head room?

I went with two mattresses, love the loft and no moisture getting through to the base.

pjay --

I'm assuming that you already have lots of insulation under the finished wood, if not add more that minimizes conductive and radiative heat loss before continuing, then it depends on the type of mattress you have.

I went with a closed cell latex foam mattress, much warmer in winter. No possible vapor migration that causes most of the moisture under the mattress and resultant mold. With a closed cell mattress you can place it on the finished wood and not worry.

If you use your camper in cold weather, where condensation is an issue, and have a conventional mattress or a open cell based foam mattress, use the some what pricey Hypervent matting under the mattress. This is what came under the mattress in my sailboat (available from Defender Marine). It is very effective at dealing with the moisture that is migrating through the mattress from you as you sleep. Mattress stays dry and mold is less likely on the colder camper surface.

jimh425 wrote:
I have reflectix now.

So that is what it is called, my foil faced bubble wrap! THX for reminder.