I'll probably pull it out of the water this year for those four months where we don't use it much. Maybe that'll cut down on the moisture and mildew.
I could just leave it uncovered and let the sun and rain take it's toll. Probably no mildew, just would have that fresh "sun-baked" appearance after a while.
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We recently had a new cover built for our Searay runabout. Our canvas
guy installed support poles with vented top hats which are supposed to
minimize mildew issues. We'll see. Mildew is a significant issue
even in Florida if the boat is not used frequently. Here's what the
vents look like:
If you have a good canvas guy he can probably install them in an
existing cover.
Another product that we're using successfully on the trawler is solar
powered exhaust vents. The solar cell charges up an internal battery
during the day which has enough power to run all through the night.
They are easy to install if you have the correct hole saw. I went out
and bought one since I was doing 6 vents.
The pole vents are easy to self-install. You cut a circle (it doesn't
have to be perfect - just not too large) in the cover and the vents have
a base that forms a seal with two large rubber washers. They are
clamped in place by spinning the vent onto a threaded piece. This is a
similar product to the one I used:
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Mildew removal... redux
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