Anti Condensation Paint

[EBoat126]

Having removed the manky 1970s vinyl lining of the boat we're probably going to get condensation problems.

Has anyone used Anti Condensation paint inside their boat & which one would you recommend?

 

[Rabbie]

B&Q Kitchen and Bathroom Paint. 1st class for the job. Cheap too.

 

[VicS]

I think B&Q sell International Paints anti condensation paint. That's International "Ordinary" Paint not International Yacht Paint!

International Yacht Paint no longer appear to do the Korkon anti condensation paint that they used to. I would not have recommended it anyway.

 

[Graham66]

Anti condensation paints only hold the moisture until ventilation can remove it .
The original International Korkon contained ground cork and worked well providing there was a good flow of air, reduce that and the dreaded black spot would appear as soon as the biocide had disipated !

 

[Loginname]

I can't see that, compared with the ex-vinyl, a paint can be much good. Surely all it can offer is a miniscule amount of insulation, but much, much less than you would have had with the vinyl?

Don't forget that, in addition to insulation, the other thing you can do to reduce condensation is to improve ventilation.

 

[Rabbie]

True to a point but as the guy is removing his headlining he might as well use a paint that gives some protection from moisture. My suggestion works! Well, it worked for me.

 

[EBoat126]

Thanks all for your comments, The headlining is completely knackered so had to come out. The longest we would spend on board is a couple of nights with enough alcohol on board so as not to care. Ventilation is pretty good due to extremely bad fitting hatch. You get the picture of the boat...race, drink, sleep. Just looking for something to help a bit with the drips and make it look nice.

 

[moody1]

[ QUOTE ]
Thanks all for your comments, The headlining is completely knackered so had to come out. The longest we would spend on board is a couple of nights with enough alcohol on board so as not to care. Ventilation is pretty good due to extremely bad fitting hatch. You get the picture of the boat...race, drink, sleep. Just looking for something to help a bit with the drips and make it look nice.

[/ QUOTE ]

Vinyl Matt Emulsion, as another said B&Q Bathroom paint. A further point to note is that never have anything touching the deckhead such as folded sleeping bags etc. as that will 'wick" create wet patches in the bag and also collect the water under the deckhead. When we stow or use the boat we always make sure the fwd cabin deckhead is clear having made the mistake before.

 

[MM5AHO]

Hadn't really thought about this before, but condensation only forms where there's heat transfer to allow cooling of the most air and in turn to allow water to turn from gas phase to liquid. So shouldn't any form of insulation do this?
An insulating paint ythat prevents the hull, bulhead, whatever, from transmitting the heat away?

 

[Marsupial]

Condensation "happens" where moist air is cooled below its dewpoint. If you insulate a surface so it is above the dewpoint the consensation will form somewhere else. Usually it forms on metal parts that allow conduction to the outside, like port frams and hatch frames. Or any metal part that protudes thriough the hull to cooler air on deck, e.g. chain plates in some boats.

The reality is that there is not much that can be done to stop condensation, it will always go to the next coldest surface what ever that is. If you insulate everything then the dewpoint can be inside the material or object - so you get black mildew behind locker backs, inside bilges, behind the headlining. (in houses it can happen inside insulated cavity walls with horrible consiquences). It often forms under or IN matresses.

Because in the marine environment it is "inevitable" the cure is to improve ventilation and dry out the air, this will decrease the temperature of the dewpoint. AND reduce the amount water present that can be deposited.

Paint a couple of microns thick is an "optimistic" remedy, save your money and drill a few holes.