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  Advice on fixing plywood under deck

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Author Topic:   Advice on fixing plywood under deck
jay posted 01-30-2003 08:06 PM ET (US)   Profile for jay  
Need some advice on the best way to fix the plywood under the deck in the bilge sump and under cooler seat blocks. I had some holes in the deck where hardware (pump, cooler blcoks) were screwed in. Figured water leaking into hull from holes.

Ground glass off, expected to see rotten foam, but instead see plywood. What do I do, just relay glass back over wood? or should I remove wood, see if rotten foam under, then replace wood and glass?

JimU posted 01-31-2003 04:25 PM ET (US)     Profile for JimU  Send Email to JimU     
What model Whaler? I just replaced wood on the underside of both decks of my 25OR Glass is pretty thick. Remove all wood with crowbar, scraper and grinder. ply wood consists of 1/4 in plywood sandwiched between 1/2 plywood and Fiberglass skin.Apply resin to skin. apply 1/4 ply then 1/2 ply then Glass and resin to 1/2 ply. Be sure to glass and seal all edges of the ply wood. it's a big job but not daunting. Luck JIM
Taylor posted 02-02-2003 02:12 PM ET (US)     Profile for Taylor  Send Email to Taylor     
What's 'rotten foam'? I don't think that the foam rots. Yes it can get wet, and dirt tends to intrude in areas around holes. This results in foam that has a dirty grey look if you actually get a look at it. But that is not rot.

Just having a few holes in the deck is not enough (in my mind) to justify grinding out the glass, pulling the wood and rebuilding. Wood can rot, but do you have some reason to believe this has happened?

I think what most folks do when they have some old holes is simply fill them with Marine-Tex or the like.

jay posted 02-03-2003 05:52 PM ET (US)     Profile for jay    
It's an '86 Newport with center console.

Rotten foam is black foam. Under my VRO tank hold down, the foam was wet and totally black around the mounting holes.

I've got no reason to suspect big problems except for how wet the foam was under the VRO tank from similar sized mounting holes. Also, the plywood appears wet in one area.

JimU, do I have the same amount of wood as you? Sounds like a huge amount of work to do what you did.

JimU posted 02-04-2003 02:55 PM ET (US)     Profile for JimU  Send Email to JimU     
If the newport is on the same hull as the Montauk, it has no removable decks to my knnowledge. If you are referring to plywood
molded into foam, the only to replace it is to refer to the wood locating diagram, cut through the deck around the plywood, remove it, relpace it, foam it back in and repair the deck. I have not done this and although it appear to be a lot of work, it should be straight forward. JIM

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