Thread: Roof top tent condensation - what's the trick to stopping it?

Hi all

A while ago I purchased a Hannibal roof top tent second hand. It was a bit neglected and had water damage, so I had to replace the mattress, the plastic/vinyl cover (from Hannibal), clean the mould from the base and scrub the canvas. It came up a treat and I was looking forward to using it.

So i finally had my first night in it last weekend. It was really comfortable and I had a great sleep, however in the morning, everything internal was saturated. I admit that the outside temp at dawn was 3 degrees and there was thick fog, but I never expected to be so wet inside.

I have ordered a product called Aeromat to go under the mattress to help with air circulation, but are there any tricks to stopping the moisture inside?

Thanks heaps

Originally Posted by Chops

Even at -7 degs we used to have the windows open a fair bit,, at least half way. Never really had an issue with condensation unless we forgot to open them up.

Similar issue in the builtin RTT on our camper trailer. Even with the windows open on three sides we ran into this the other week at similar temps. The mulgo top on the truck jad no such issues however. The mulgo has some minimal heat shield and marine carpet on the ceiling whereas the trailer is currently bare aluminum. Not sure that accounts for the difference in some way but the insulation I would think would tend to prevent such a severe temperature difference from immediate topside and bottomside of the aluminum roof. Perhaps that slight buffer made the difference, though if so I'm not certain how to apply it as a fix to a soft top tent.