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post #11 of 14 Old 05-26-2008
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I always have a bit of standing water in my bilge and have no mildew issues. I have 5 large dorades and while it's not practical to add them to most boats it does prove to me that good ventilation, however you achieve it, is the answer to mildew issues.
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post #12 of 14 Old 05-26-2008
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In my experience the water in the bilge makes no difference (there is always some water in my toilets anyway. The real answer for me was to run a dehumidifier for the winter months (assuming you are in a Marina). I also have had huge problems with condensation underneath the mattresses so I know make a point of making sure they are standing up in the cabins and not on the bunks

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post #13 of 14 Old 05-26-2008
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My last boat has always been shrinkwrapped during winter lay-up, resulting in no leaks to the cabins or bilges. The masts (ketch rig) were deck stepped, so no issues there.

The boat I had prior to that however, was covered with a tarp in the off-season. That boat always accumulated some water in the bilge over the winter. After one season too many of discovering fuzzy spores in the cabin - come spring-izing, I started using a trick that was the permanent cure to all cabin dampness. I repeated this process on the following boat as well.

Depending upon the size of your boat, gauge these quantities accordingly. For my Nauticat, prior to each winter season, I bought 5 lbs of DampRid, a 5 lb bag of clay cat litter, and three shoebox sized plastic bins from the dollar store. Mix the ingredients 50/50 and fill the bins equally. Disperse them around the cabins with covers off, and your boat's interiors will be dry come springtime.

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sold the Nauticat
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post #14 of 14 Old 05-27-2008
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I keep a de-humidifier running over the winter months. It has the facility to drain into the galley sink, but I go on board often enough to empty its 1 gallon container. It works very well even though the boat is otherwise closed up and in a very humid climate.

You could rig a wet and dry vacuum cleaner on a timer plug to suck your bilge dry once a week. But you would have to visit the boat often enough to empty its container. It might reduce the evaporation surface area.

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