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Agri 01-17-2013 06:23 PM

Two month Barnacle Growth PNW
I'm getting ready to launch my boat hopefully next week. My concern is that currently there is no bottom paint on her. The entire bottom has been covered with an epoxy barrier coat. Current forecasts for the next little while in the Vancouver area have the temperature highs at plus 7C or 44F. I'm worried that if I paint her now the paint might not adhere properly. My plan is to launch her now and then in two months or so when the temperature is more appropriate haul her out again and paint the bottom.

Is this a good idea or will I be spending extra days in the yard scrapping off barnacles come spring time? And will said barnacles ruin the epoxy barrier coat?


jrd22 01-17-2013 06:32 PM

Re: Two month Barnacle Growth PNW
From what I've seen from diving under our boats two months at this time of year shouldn't be a problem. But if you are like me two months has a habit of turning into 4 or 5 or ?. That could be a problem.

bwindrope 01-17-2013 06:53 PM

Re: Two month Barnacle Growth PNW
If strict to two months I agree with jrd22. I can't recall the season of barnacle spawning, but doubt it is now. Even my dinghy, which lives in the water here in the Salish Sea, is accumulating no barnacles right now, whereas in the spring and summer I have to scrape them off every few weeks.

And I don't suspect whatever small amount of algae or barnacles would do any harm whatsoever to your epoxy coat. The glue of barnacles is world-class, but even if you get any and scrape them off, it would only take a very light sanding to remove the residue.

If I were in your shoes, I would do it, and make sure I hauled before the end of April.

Faster 01-17-2013 08:58 PM

Re: Two month Barnacle Growth PNW
You are going to have a coating of alge and slime.. but if you keep the time short I wouldn't expect barnacles. Where are you mooring?

PaulinVictoria 01-17-2013 10:52 PM

Re: Two month Barnacle Growth PNW
I left my dingy in the water all summer (no paint whatsoever on it), when I finally got round to pulling it out in November there were about 4 small barnacles on it and a bit of spongey/slimey stuff.

Agri 01-17-2013 11:32 PM


Originally Posted by Faster (Post 977358)
Where are you mooring?

Cowichan Bay. Thanks for all the answers. I feel much more comfortable with my plan now.

blt2ski 01-17-2013 11:44 PM

Re: Two month Barnacle Growth PNW
I painted my boat mid february two yrs ago, temps around 28F-40 or so. Painted last week in the same temps, launched yesterday.......

If you are already out, you could wrap the boat in a plastic tent, rent an lp/butane style heater, heat the area up into the 50-60F range, paint then launch. That might be cheaper than launching now, re hauling in 2 months etc.

Options is all I am giving......I'm the odd ball on the answers, but you see my answer and what I have done etc. There are 2-5 other boats sanding, painting etc in the tent manner I described at my marina north of seattle. unlike me...........


Petar 01-17-2013 11:44 PM

Re: Two month Barnacle Growth PNW
I moore in Point Roberts, WA and in summer time if I leave my dinghy in the water even for a week, barnacles grow on it like crazy. I resorted to using inflated inner tube of a truck tire to rest my dinghy on. In the fall when I deflate and store my dinghy, i pull out the inner tube and it takes me an hour of scraping to remove just the crude stuff, while the white rings remain on it permanently...
I've seen a dinghy covered in thousands of barnacles over the summer period. On my boat painted with Micron CSC every two years and hauled for checkup and power wash every spring I only find barnacles on the propeller shaft and max prop blades.

Not sure how much less is the growth in the winter period.

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