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Marine Grade Plywood?


DRH1175

Question

I am replacing the Casting Deck in a Alumacraft boat that is rotten. I bought a sheet of 3/4" Marine grade from the Local "M" Store. Do I have to do anything other than cut, carpet and screw?

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Are you certain it IS "marine grade"? As Menards does sell it but is special order at most stores. The stuff they stock is treated but has many voids that hold water and will rot out in time.

But to answer your question, no you don't need to do anything else with it. If you do want to protect it a little more you can coat the top surface, holes, and edges in a epoxy fiberglass resin.

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Remember that treated wood and aluminum is not necessarily a good combination.

Corrosion can be a problem.

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Is 3/4" standard for casting decks? I may need to do the same thing in a year or two and thought my deck was 1/2" and I wanted to go to 3/4". But then again, I never really checked and the boat is in storage. It's a '98 C'liner 1750 FH. Thanks.

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I am working on replacing the floor in an older Lund.

The M store has marine grade plywood and it is labeled as such. This stuff is not treated, so corrosion is not a problem.

It does need to be sealed to slow down rot and damage. I am using spar varnish. From what I have read, you need to cut the wood to the shape(s) you need and then seal it. Pay particular attention to the cut edges.

Then you can attach carpet and or vinyl. When putting the new floor back in the boat, make sure to use aluminum rivets.

Check out tin boats dot net for a lot more information on floors and aluminum boat restoration.

Good luck!

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  • 'we have more fun' FishingMN Builders

Didn't they have a half way at 5/8"? 1/2" to bouncy, 3/4" is a heavy brick! frown

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My old Tyee had a 5/8 plywood floor, I replaced it with 3/4 plywood which I coated with epoxy resin. I did have to trim the bottom inside panels of the consoles to get the windshield to align properly but it wasn't a tough job.

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