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 Post subject: Possible delaminated roving under battery box.
PostPosted: 20 Apr 2022 09:15 
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Able Bodied Seaman

Joined: 25 Apr 2016 09:05
Posts: 26
Location: Toronto, Ontario, Canada.
I removed the old battery box from under the chart table seat, and the hull looks to be deteriorating under where the box was. I will try to add some photo’s
Has anyone experienced this before?


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SV Sadie Mae
Hull 185
Toronto, Ontario.
 
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 Post subject: Re: Possible delaminated roving under battery box.
PostPosted: 20 Apr 2022 14:44 
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Skipper

Joined: 09 Aug 2017 15:35
Posts: 725
Location: Maine/USVI
Is there actual hull delamination or is the gelcoat just worn off? Battery acid can be problematic. I'd open it back, clean it out, grind it back to raw glass, find any actual delam and lay up multiple layers of biax with West System. Then put 10,000 miles under her keel.

I've got all the fixin's together to stick a bow thruster in my lobster boat here in the V.I. Should be interesting. Glass ain't rocket science. I put 10+- layers on my aft deck after I cut out and replaced 5' down the centerline aft with 3/4" marine ply. Laid up so it drains to the scuppers port and starboard.


 
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 Post subject: Re: Possible delaminated roving under battery box.
PostPosted: 20 Apr 2022 19:46 
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Able Bodied Seaman

Joined: 25 Apr 2016 09:05
Posts: 26
Location: Toronto, Ontario, Canada.
Its definitely delamination. The core in that area was powder, not wet at all. it certainly looks like it had been wet at some point.
I cut back the top layer of glass which was soft and had lost all its integrity. i kept going until I hit solid core.
I will be replacing the core and glassing it on the weekend.
I am guessing a battery boiled over in there at some time in the past.

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SV Sadie Mae
Hull 185
Toronto, Ontario.


 
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 Post subject: Re: Possible delaminated roving under battery box.
PostPosted: 21 Apr 2022 11:16 
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Skipper

Joined: 09 Aug 2017 15:35
Posts: 725
Location: Maine/USVI
See what you've got going on in the outer layer of fiberglass before you jump in. It it's solid, I'd clean back to good core and I'd probably just lay the whole thing up with solid West System and biaxial glass. I've been using matt backed 17 oz. without issues, but 1.5 oz matt on it's own just breaks down with epoxy due to the binders in the matt.


 
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