Boat flooring - Marine Grade Ply vs. Pressure Treated


Old 04-18-07, 09:41 AM
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Join Date: Jan 2003
Location: USA
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Boat flooring - Marine Grade Ply vs. Pressure Treated

Hello. Thanks in advance for any info.

I'm replacing the front floor platform on my 1994 17' side console boat. I was going to use Marine Grade plywood until I saw the price. $100+ per sheet of which I only need approximately a 4x4 piece. Would using pressure treated plywood, with a layer of silicone on the top and bottom be doable, allowing me to use the 60+ dollars difference for a that Dri-dek flooring, or carpet?

Let me know. Thanks!

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Old 05-28-07, 01:38 PM
duigoose's Avatar
Join Date: Jul 2006
Location: USA
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I helped a friend replace some decking in his boat and here is what we did. Used 3/4 inch plywood, cut it to fit and put a 'hot coat' (his terminology) of fiberglass resin over that then screwed it down and glued the carpet back down. Too bad the motor was shot but this floor was stronger than original and looked good.
Old 05-28-07, 04:48 PM
Join Date: Dec 1999
Location: South Dakota
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I guess you can do as you please for your boat. However, the reason that they make marine plywood, it for just the purpose you need it. It is especially made. Green treated lumber will work, but, depending on where you are, you may get a ticket for polution. The green treated lumber will bleed into the water and leave a film. Green treated lumber was not made for boats. Marine plywood it. So I guess its up to you. Marine plywood is stronger also.
Old 05-28-07, 05:27 PM
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Join Date: May 2004
Location: Sw FL
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pt lumber is commonly used for dock building so I don't see how it would be illegal on a boat

the only thing special about marine ply vs exterior ply is marine play has no voids (potential sources of rot ) so from that perspective it would be stronger , but not enough to notice in this application
Old 05-30-07, 06:11 AM
Join Date: Aug 2005
Posts: 2,268
Mango man is correct. On the other hand, wood is wood - and will eventually rot. I recently replaced the entire floor on my boat - using 3/4inch plastic panels. It is stronger than wood, and will last forever....
Old 05-31-07, 09:46 PM
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Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389

If your going to cover it . We use P/T all the time. If its going to show . Might look into 3/4" exterior Ply same glue.
Old 10-05-09, 12:00 PM
Join Date: Oct 2009
Location: Texas
Posts: 1
Foam floation removal

Anyone know a quick way to remove foam floation between floor and the bottom of boat. Is there a chemical that dissolves the foam?

Ed Who
Old 10-05-09, 06:13 PM
Join Date: Jul 2008
Location: Montgomery MN
Posts: 541
There is no easy way to remove it just chip it out.

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