plywood?

[tomxc700]

I posted on there and they really didn't help at all locating it locally. I only got answers from people that live in Florida on what they would do. I have it all figured out except for finding the replacement vinyl. I will probably have to order it from Starcraft and wait 3-4 days to get it. I need to check the color of what they are putting in now to what I have, and then decide. But thanks anyways for the heads up on iboats.

 

[rjgoniea]

I guess my jobs are the exception to your "5 year rule" LOL because I have used the green treated plywood product on projects from boat repairs to All Weather wood Foundation systems (basements & crawl spaces) witout a single failure going back 20 years.

I'd have to second that. I'm the proud owner of a 1972 Crest pontoon. (been in my family the whole time) It is on it's third deck right now. The first was replaced sometime in the early 80's, the second in 1997. The first time it was replaced was by some professional and I assume they used marine grade ply. The second time, I did it myself using pressure treated ply. (attached a few pics) As far as I can tell, there has been no rot on the decking in the 13 years since. The carpet is another matter, but that's a subject for another time. If you were to use PT on the project, I would advise you to go back 6-8 weeks later and check on the tightness of any bolts used to hold it down. That plywood tends to have a lot of moisture when you buy it and shrinks a bit after installation.

 

[pete_w]

http://www.michiganlumber.com/default.htm in Flint claims to stock Marine grade plywood,not sure about the 12foot length
Pete

 

[anonomoose]

I'd have to second that. I'm the proud owner of a 1972 Crest pontoon. (been in my family the whole time) It is on it's third deck right now. The first was replaced sometime in the early 80's, the second in 1997. The first time it was replaced was by some professional and I assume they used marine grade ply. The second time, I did it myself using pressure treated ply. (attached a few pics) As far as I can tell, there has been no rot on the decking in the 13 years since. The carpet is another matter, but that's a subject for another time. If you were to use PT on the project, I would advise you to go back 6-8 weeks later and check on the tightness of any bolts used to hold it down. That plywood tends to have a lot of moisture when you buy it and shrinks a bit after installation.

First of all, a pontooner doesn't have the same conditions exposed to it as will the bottom boat with wood sandwiched between the vinyl. Wood that can dry should last longer. (remember you assume marine grade was used...maybe a short cut was taken?? eh??)

While no doubt green board would work, as someone already mentioned it shrinks and expands a bunch...not sure you want that with a boat flooring.

Besides, that green board is full of nasty chemicals leeching out and being contained in a floor board when the sun beats down where you are breathing that stuff on every outing. It is the only wood I know that comes with it's own health hazzard warnings. No doubt cheaper but I wouldn't use it on anything you would be around alot...but then I am super careful about that sort of thing. (I don't use it at all for that reason)

 

[rjgoniea]

First of all, a pontooner doesn't have the same conditions exposed to it as will the bottom boat with wood sandwiched between the vinyl. Wood that can dry should last longer. (remember you assume marine grade was used...maybe a short cut was taken?? eh??)

I doubt it. You are assuming that I cannot tell the difference between marine grade and PT. There was no de-lamination on my last deck, only rot. Non-rotted portions of that 2nd deck were in such good shape that I have re-used them in high moisture applications with no degrading yet.

While no doubt green board would work, as someone already mentioned it shrinks and expands a bunch...not sure you want that with a boat flooring.

I mentioned the shrinkage. There are ways to obviate the problem.

Besides, that green board is full of nasty chemicals leeching out and being contained in a floor board when the sun beats down where you are breathing that stuff on every outing. It is the only wood I know that comes with it's own health hazzard warnings. No doubt cheaper but I wouldn't use it on anything you would be around alot...but then I am super careful about that sort of thing. (I don't use it at all for that reason)

I'm curious what your opinions are on the following:
particle-associated polyaromatic hydrocarbons
carbonyl compounds
volatile organic hydrocarbons
nitrogen dioxide
carbon monoxide

All of those things are in something that you likely have been exposed to a lot if you are on this site, 2-stroke exhaust, especially if the engine has a carb for fuel delivery.
The chemicals coming out of PT wood are minute in comparison.
Check out this article on the Fine Gardening web site about the issues of PT wood.
http://www.finegardening.com/design/articles/pressure-treated-wood-in-beds.aspx
Obviously not a site that would be pro PT lumber companies. The tone of the article suggests that there really is not much of a health issue, especially today since CCA is no longer used as the preservative.

 

[98panther]

The old green treated chemical had CCA (A=arsenic), so they made them use something else. But the old was not corrosive to metals.

The new treating chemicals are corrosive and will cause a problem. For sure.

they switched about 4-5 years ago around here.

----
and marine grade is not treated, it's a high grade(min voids) that also has exterior glue. But the wood will and can rot
-----
Sold lumber for 20 years thereismy2cents

 

[propjockey]

IF you are planning to keep this boat for a while....
And you don't want to do this AGAIN....
And you want to do this project CORRECTLY.....

Use Starboard.

Period.


Otherwise, use regular ol' plywood and coat all SIX sides with driveway sealer.


-J-

 

[tomxc700]

Dang Prop couldn't you find anything cheaper. lol