Most of the previous entries had tackled the problem of condensation from the aspect of

"How to minimise the humidity below the mattress, so that condensation does not occur."

As mentioned in my earlier entry, we mainly use HyperVent and having looked at the relative performance over this year, we definitely think that it performs better than the Dry-Mat type of product.

We sail in Scotland where the seawater temperature varies between 9ºC & 14ºC.  During the night, I think the area under the bed bases is likely to be close to these temperatures and therefore I started to look at the problem from the viewpoint;

"How to keep the temperature of the underneath the mattresses high enough so that condensation does not occur."

I have started to stick pieces of

"Recticel Eurothane GP Insulation 2400 x 1200 x 25mm from Jewsons, the builders merchant"

on the underside of the hatch covers in the bed bases and underneath the other fibreglass sections of the bed base.  Though I am only part way through the process, this insulation certainly seems to be having an effect, as where there is insulation, there is no condnsation, whilst the uninsulated parts have showed some condensation.  Above the water tank, I may have to use a slighly thinner sheet.

Points to remember

You can cut it cleanly with a good sharp knife that needs to be resharpened fairly frequently.

You can just strip off the aluminium on the side where you want to put the glue.

On the hatch covers, remember to cout out sections so you can still use the finger holes.

Do not use above the battety box cover.