Tackling condensation under the bed. Froli / Air Mat

P

Phil_boat

Well-Known Member
Joined
6 Jul 2025
Messages
182
Visit site
We've slept a few times in the boat now and yesterday morning realised underneath the cushions (it's not quite a mattress being only about 80mm thick) was very damp. I think it's a combination of condensation forming on the hull sides and running down the edge of the cushion and condensing against the top of the lockers. It's obviously not a new thing as there's evidence of them being wet from before we bought it.

I'm going to get either some air venting underlay

1775740598043.png

Or if it's worth it some of the Froli springs.

1775740279362.png


Obviously the Froli system is a lot more expensive, is it worth it and does it work well with thin cushions? Also I have a locker lid of around 50cm square which I assume I could screw a small number of the squares on to so it can still be removed?

Cheers!
 
I have a double layer of dri-mat under our foam which has helped a lot with condensation. The two layers are held together well enough with a few tiny cable ties.
It wasn’t totally successful though, so I fitted a 80mm 12v computer fan into the lid of the locker to force airflow through the matting, and that has proved a good combination. Our case may be a bit extreme though, as we stay on the boat in the winter too.
I run the fan for 15mins in a morning, and I bought a ball bearing version instead of the cheaper roller bearings as it is installed horizontally.
Other people report good things from gluing foam sheets like kingspan to the underside of the base board and locker lids, to reduce the warm/cold interface at the mattress
 
Last edited:
I have the froli system and it did massively reduce the condensation issues. I managed to buy it on fb marketplace so wasnt expensive. Another option is timber bed slats. I also sit bed cushions on their end after we get up to air
 
You must log in or register to reply here.

Share this page

Top