How dry is your boat?

[TonyS]

I have a monitor in my boat that has read 73 % RH for the last 2-3 weeks. The bilges are absolutely dry as it is a saildrive. Is this a normal level of RH. I think in the summer a typical figure was 60%. Is this just a reflection of the change in ambient temperature and signals the need to turn on the de-humidifier?


<hr width=100% size=1>Tony

 

[Boathook]

I don't have a monitor and do not know what the humidity is. Since increasing the ventalation the boat is a lot 'dryer' and this is without heaters ! I am going to have a go at washing/wipping the inside down to remove salt crystals which will hopefully make her feel even dryer.

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[pragmatist]

We get something very similar before adding dehumidifier or lighting the stove

<hr width=100% size=1>a pragmatist is an optimist with a boat in the UK - but serious about not being in the UK !

 

[LORDNELSON]

For what it is worth my boat has been laid up out of the water since 15th October. She has had a small thermostat controlled heater and a dehumidifier running since 20th October, humidity reading a few days ago was around 58 degrees RH.

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[billmacfarlane]

I go my dehumidifier working for the winter last weekend and the humidity was in the region of 75-80%.

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[TonyS]

I have now got my de-humidifier working and it has dropped the humidity to 60% quite quickly but now seems stuck at that. I believe the target to prevent mould and mildew is 58% RH

<hr width=100% size=1>Tony