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TURIZZIANI


USA
44 Posts
Posted - 06/10/2009 :  12:32:19 PM  Show Profile Send TURIZZIANI a Private Message  Reply with Quote
Have any of you guys removed the canvas only to find soft "rotten" plywood underneath it? I would like to do something besides canvas when I fix this and wonder if any had luck with this job? Wondering if I should totaly remove decking or cover over existing I know that some times when you remove all the old it is hard to get back to the way it was. thinking about using 1/4 douglas 4 by 8 sheet plywood to cover then encapusating with west systems epoxy and then 2 or 4 good coats of topside paint. Any ideas wecome

monterey74



USA
51 Posts
Posted - 06/10/2009 :  1:08:58 PM  Show Profile  Visit monterey74's Homepage Send monterey74 a Private Message  Reply with Quote
My Monterey has had the original vinyl decking material replaced with fiberglass. A previous owner removed all the vinyl, bonded a layer of 3/16" plywood over top of the original plywood to create a smooth surface, then glassed over top of the new plywood. He did a pretty good job and certainly prevented the boat from rotting away.

How extensive is the rot? The slightly curved form of the original plywood is important for keeping the deck stiff and the cabin superstructure from sagging.

I would be interested in hearing more about your project.

Brett

1974 2885 Monterey
1978 2896 Mariner (Stripped down to the gunwale and ready to cut)
Edited by - monterey74 on 06/10/2009 1:18:07 PM
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TURIZZIANI



USA
44 Posts
Posted - 06/10/2009 :  1:58:54 PM  Show Profile Send TURIZZIANI a Private Message  Reply with Quote
sounds like what I was planing to do wish my previous owner had done mine yours looks great mine is bad in both corners by windshield cross members still mostely intact,bad right down centerline about 2-3 inches wide. I have it tarped off and it is dried out real good need some decent weather to go forward..
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monterey74



USA
51 Posts
Posted - 06/10/2009 :  2:18:26 PM  Show Profile  Visit monterey74's Homepage Send monterey74 a Private Message  Reply with Quote
The previous owner did do a pretty good job of glassing the top in. He did not however finish it. He slapped a coat of white paint on it and sold the boat. I am currently in the process of sanding and filling to get the fiberglass ready for paint.

From what the previous owner told me, my boat also had some rot down the centerline of the salon roof. That it the main reason he added the second layer of plywood. The centerline rot was so narrow that it is not visible from inside the cabin, it is obscured by the mahogany support that follows the centerline.

There were also 2 spots of rot in the plywood on the starboard side. One was at the aft corner of the salon roof, right above the galley. The other was at the forward corner of the salon windshield in the forward deck of the boat. The repaired areas on these spots can be seen from inside the cabin with the headliner removed.

If your cabin roof is still structurally sound and not sagging you should be able to use your plan of adding a second layer of plywood and glassing it in. The alternative is to remove the teak windshield frames/walls and replace the original plywood. If you opt to simply cover over the bad areas, I would strongly recommend that you get some Smith's Penetrating Epoxy to saturate the damaged wood before doing anything else. It will stop the rot and strengthen the remaining wood.

1974 2885 Monterey
1978 2896 Mariner (Stripped down to the gunwale and ready to cut)
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TURIZZIANI



USA
44 Posts
Posted - 06/10/2009 :  2:28:08 PM  Show Profile Send TURIZZIANI a Private Message  Reply with Quote
AGREED, the rotted stuff needs to be sealed up never used Smiths always favored West Systems have you tried it? sound like they both had almost identical problem not that bad for over 35 years
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monterey74



USA
51 Posts
Posted - 06/10/2009 :  2:47:49 PM  Show Profile  Visit monterey74's Homepage Send monterey74 a Private Message  Reply with Quote
I use West System for the actual fiberglass work. The Smith's is a product that is designed to soak into rotted wood and to stabilize it before doing the repair.

I have heard some people will thin West System down to allow it to penetrate into the wood. I do not think that it has the same benefits as using Smith's. The Smith's Penetrating Epoxy has a cocktail of solvents in it that will displace moisture and kill rot organisms. The stuff stinks to high-heaven and is one of the few products I have encountered that will make you feel ill after only short exposure to the fumes. It takes a long time to fully cure, up to a week or more depending on the temperature. The long pot-life and the thin nature of the product allow it to soak very deeply into the wood.

http://www.smithandcompany.org/CPES/index.html

1974 2885 Monterey
1978 2896 Mariner (Stripped down to the gunwale and ready to cut)
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