Re: Rhodes 19, above waterline blisters


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Posted by B.B. on February 14, 2005 at 03:46:36:

In Reply to: Rhodes 19, above waterline blisters posted by JHohn Giffis on February 14, 2005 at 03:37:01:

Posted by Bengt Blomberg on January 11, 2003 at 04:17:27:
In Reply to: Rhodes 19 above waterline blisters posted by John Giffis on January 09, 2003 at 10:03:22:
: I have an old Rhodes 19. This winter the boat developed small to medium (1/4inch) blisters in the jelcoat just above the waterline outside the seats. The blisters are most pronounced where the poly tarp touched the hull, coincidently where the seats are. The seats in this boat are air tanks with plugs; the tanks occasionaly get wet. Do I have an osmosis problem?

Yes you do have an hydrolysis started from two reasons:
1. The air tanks will always have condense on the inside against the hull which feed enough moisture into the laminate to start the process and cause some voids in the laminate.
2. Also the tarp on the outside will get a lot of condense on the inside and should never be allowed to come close to the hull sides. It can be useful during transports but afterwards a wider cover should be used.
Regarding the seats my advise is to apply at least two of the large (about 5" diameter) plastic vent, where the cover can be screwed off when the boat is not used, in every seat. They are used in many canoes and small sailing boats and available at all yacht equipment stores.
If you have no problem with the bottom of the boat, that should be enough to halt the process so the blisters can be sanded, filled and painted.


: Posted by John Giffis on January 09, 2003 at 10:03:22:
: I have an old Rhodes 19. This winter the boat developed small to medium (1/4inch) blisters in the jelcoat just above the waterline outside the seats. The blisters are most pronounced where the poly tarp touched the hull, coincidently where the seats are. The seats in this boat are air tanks with plugs; the tanks occasionaly get wet. Do I have an osmosis problem?




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