Help replacing my deck and have conflicting information

mister1031

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Joined
May 2, 2013
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1
This is my first posting to this forum so I hope the topic is appropriate here. Anyway, here is my issue and question:

I have a '84 Century 3000 Sport XL bow-rider that is at the upholstery shop now having a complete re-do and after he pulled up all the carpeting, he's told me the original plywood is delaminating, especially evident as he pulled up the old carpet. He further suggested that the floors should be replaced with new marine plywood before he re-carpets the entire boat. The stuff is not cheap (about $100+ per 4X8 panel)

That being the case, when he pulls up the old plywood, it would seem to be be a good time to examine the stringers, engine supports and transom. Assuming any of them need work, I thought it would would be the best time to do it. I realize an adhesive must be used for the carpet bonding.

Also, I there are some minor fiberglass repairs needed. All this led me to contact a local boat restorer to see if he was interested in the project. I was thinking that, given the age of the boat, I didn't want to spend a ton on this project.

I described the above to the Boat restorer, whose only comment was, "No thanks.....and if your "upholstery guy" says to use marine plywood he doesn't know what he's doing as resin won't stick to it for more than a year.....

So, who is right? The upholsterer or the boat restoration guy? I've always heard that Marine Plywood was the only plywood suitable for boat flooring but what am I missing?

Any comments would be appreciated!
 

mwe-maxxowner

Master Chief Petty Officer
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Jun 20, 2012
Messages
825
Re: Help replacing my deck and have conflicting information

I'm not an expert, but I've gleaned a lot of information from this place. Marine grade is the BEST, but arauco brand plywood, and bcx exterior grade plywood sure both very good choices. Interior grade with non waterproof glue and treated plywood are not acceptable. We all mostly use regular exterior grade ply. Its cheaper and works well. Marine grade is harder to find, and more expensive. Though I don't think it is 100$ a sheet.
 

tpenfield

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Jul 18, 2011
Messages
19,013
Re: Help replacing my deck and have conflicting information

Exterior rated plywood would be fine for the floor and the stringers. That is what boat companies use to a great extent.
 

Bob_VT

Moderator & Unofficial iBoats Historian
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May 19, 2001
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26,108
Re: Help replacing my deck and have conflicting information

Here is the hint - cheaper exterior grade plywood uses the same glue as marine plywood.

Question - are you going to keep the boat another 29 years? that is how long cheap plywood lasted ;)
 

rickryder

Commander
Joined
Jun 24, 2010
Messages
2,722
Re: Help replacing my deck and have conflicting information

Your boat resto guy is mistaken..... he is thinking of pressure treated ply that needs to dry for a year before use.... not that I would use PT in a boat....Read some resto threads here and you will see you can rebuild it yourself and save $$$$$
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,932
Re: Help replacing my deck and have conflicting information

What Make, Model, and Year is this boat? The guys are Steering you right and your Boat Restorer is not. A good Ext. grade of Plywood when fully encapsulated with Either Polyester resin or Epoxy and then properly cared for and maintained will last for decades.
 

Yacht Dr.

Vice Admiral
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Feb 26, 2005
Messages
5,581
Re: Help replacing my deck and have conflicting information

This is my first posting to this forum so I hope the topic is appropriate here. Anyway, here is my question:

I described the above to the Boat restorer, whose only comment was, "No thanks.....and if your "upholstery guy" says to use marine plywood he doesn't know what he's doing as resin won't stick to it for more than a year.....

So, who is right? The upholsterer or the boat restoration guy? I've always heard that Marine Plywood was the only plywood suitable for boat flooring but what am I missing?

Any comments would be appreciated!

Its all about PREP. Marine is the Normal and does 'take' resin and glass for decades. So he is wrong.

Yes you can use other plywood for a DIY resto .. as long as its prepped right.

Wood ... Glass .. they are completely compatible .. its the Prep that makes it.

YD.
 
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