Damp issues!!

[Westie2000]

Ladies/gents

I have just taken delivery of a 1998 sea ray sundancer 330 and am new to boating. I'm concerned that below decks seems to have a lot of moisture in it with visible condensation on the ceiling. It's come from the Broads which I am informed is particularly susceptible to damp.

I have been using a dehumidifier which is collecting quite a bit of water, but short of a leak, I am wondering what I can do to eradicate this issue. I would like to start spending the odd night on her but with the dampness it's putting me off for now.

Could I have comments/ advice as to what might be the problem and if indeed this is a known and regular problem with motor boats? What's the best method for cutting out this issue? Thanks

 

[Spi D]

If you have no leaks, condensation must be the cause. It happens to all and a dehumidifier is by far the most efficient way to fight it. In addition to drying it will add a little to the temperature inside.

Such devices need to work in closed rooms (as not to fight the humidity of the nature outside), but apart from that VENTILATION is the key. Open each and every door/hatch/locker when the temperature is high(ish) and close in due time before dew.
Any unwanted smell etc. needs to be removed by cleaning or disinfection. Some fabrics like curtains ect. may need thorough wash or replacement.

Sleeping onboard will produce moist especially under mattresses, a common problem with a number of recommended solutions all concerning ventilation under the mattress.

 

[Westie2000]

Many thanks. Much appreciated.

 

[KevB]

Have a look in the bilges and make sure you haven't got loads of water in them causing the dampness, especially the bilge in cabin area.

 

[Westie2000]

Will do. Many thanks again. At least I now have some food for thought. Very kind gents.

 

[No Regrets]

Open windows policy whilst on board is essential!

Dehumidifier when in the marina on shore power, basically get the boat as dry as possible every now and then, and never let it get too moist inside again. You'll find it's easy to keep it within the acceptable range without drying out the wood too much, or allowing anything but the most minimal moisture on windows etc.

The GRP doesn't mind, but it prolongs the life of all soft furnishings, and the boat always smells nicer...

 

[CX54WEK]

Makes sure you dot have loads of standing bilge water as this will keep the interior damp. Perhaps take the upholstery home to give it a good scrub, wash, and dry it out properly, same goes for curtains and any other soft furnishings.

If you have got a lot of bilge water you need to be tracking down why. It shouldnt be there.

The key to keeping condensation at bay is ventilation. Keep windows open whilst you are on the boat and if the weather is forecast to stay nice keeping a window or two cracked open at all times will help.

It does sound as though your boat is unduly damp mind if it is rolling off the headlinings. Did your surveyor not mention it?