Decking Materials

[DrDecay]

I have heard of a newer decking material better than marine plywood. As I understand it, each layer is Wolmanized and then all the layers are epoxied together. Does anyone know what this is called and when did manufacturers start using it?

 

[Grub54891]

Re: Decking Materials

Googled it
http://www.americanpoleandtimber.com/pdf/treated_wood_specguide.pdf

I don't think I'd use it as its pressure treated,hard to get the resins to stick to it from what I understand. Also treated wood attack's aluminum,so I'm not shure how they claim to use it in marine construction?
Maybe someone else has experience with it and will chime in.
Grub

 

[Watermann]

Re: Decking Materials

Yah I'm going to pass on the chromium, copper and arsenic soaked plywood.

 

[bigmaac73]

Re: Decking Materials

Yah I'm going to pass on the chromium, copper and arsenic soaked plywood.

I dont think he is going to be eating the wood. What is the problem. If we take the precautions we are supposed to take anyways when using this stuff it is not a big deal.

 

[Chris1956]

Re: Decking Materials

I use pressure treated lumber and plywood for all my repairs. Get it good and dry and resin will stick fine. I think it is especially good for stringers and frames, which are usually not coated with resin/glass, as it will not rot very quickly.

 

[Watermann]

Re: Decking Materials

I dont think he is going to be eating the wood. What is the problem. If we take the precautions we are supposed to take anyways when using this stuff it is not a big deal.

No it's not a big deal to me if you buy it and use it if that's what you want. Don't think anyone suggested eating the plywood, but in case some of those chemicals are toxic not only to an aluminum boat just be sure to wear a respirator when sawing or sanding it.

 

[metriccrescentwrench]

Re: Decking Materials

I have heard of a newer decking material better than marine plywood. As I understand it, each layer is Wolmanized and then all the layers are epoxied together. Does anyone know what this is called and when did manufacturers start using it?

I'd imagine that what the OP is talking about is NOT pressure treated plywood. My guess is that he's thinking about one of the composite materials such as Coosa Board.

 

[204 Escape]

Re: Decking Materials

There use to be a tag on the old CCA wood that told you NOT to wash the clothes you are wearing at the time with the rest of your clothes. To wash them seperately.

ALSO, it advised you to wear a resperator. The stuff was wicked!!

What about the material they call TREX, or something like it ?? EXPENSIVE, but .......................... supposed to be good stuff.

 

[Chris1956]

Re: Decking Materials

The composite lumber like Trex, timbertech etc, have no structural strength and weigh a lot. They sink in saltwater, due to their density. They barely can support the live load of a deck. Some need to be supported every 12" or they sag of their own weight.

 

[dingbat]

Re: Decking Materials

I have heard of a newer decking material better than marine plywood. As I understand it, each layer is Wolmanized and then all the layers are epoxied together. Does anyone know what this is called and when did manufacturers start using it?

Anything "wolmanized" can not be used on a aluminum boat. The copper in the solution will eat the aluminum for lunch.

http://www.wolmanizedwood.com/Docs/Original/Specification_Guide.pdf

The conditions that are conducive to attack by fungal decay and termites also promote metal corrosion. Hot-dipped galvanized fasteners (meeting ASTM A 153) and connectors (ASTM A 653 Class G185 sheet), or better, are recommended for protection against the effects of moisture often present where treated wood is used. For Permanent Wood Foundations, use 304 or 316 stainless steel. Aluminum should not be used in direct contact with this wood.

My boat manufacturer uses Greenwood PlyDek XL which is a treated marine plywood but they don't build aluminum boats.

 

[Bob_VT]

Re: Decking Materials

I have heard of a newer decking material better than marine plywood. As I understand it, each layer is Wolmanized and then all the layers are epoxied together. Does anyone know what this is called and when did manufacturers start using it?

WHY? Do you have a deck problem? What type of boat? The deck is the "tip of the iceberg" for indication of any problems.

 

[DrDecay]

Re: Decking Materials

My current boat is having some soft spots on the floor and I know it all needs to be replaced. It is a 20 year old Celebrity and I am going to sell her as a project boat. I am not going to get into that mess. I just want to make sure that the newer boat I purchase is made of better decking than they used in 1993.

 

[Watermann]

Re: Decking Materials

My current boat is having some soft spots on the floor and I know it all needs to be replaced. It is a 20 year old Celebrity and I am going to sell her as a project boat. I am not going to get into that mess. I just want to make sure that the newer boat I purchase is made of better decking than they used in 1993.

I've noticed that the majority of boat owners with rotten decks spend a couple hundred bucks decking over the rot and selling their like new turn key boat that's ready for the waves. Usually the buyers are unsuspecting new boat owners.

 

[jigngrub]

Re: Decking Materials

Chromated Copper Arsenate or CCA plywood is the best and longest lasting marine plywood you can buy. It is kiln dried after pressure treating and absorbs resins readily. It's safe to use on aluminum boats, my boat came from the factory with CCA decking and transom.

Every piece of treated lumber you ever touched or worked with before 2002 was CCA pressure treated.

 

[Chris1956]

Re: Decking Materials

Jig, In NJ we cannot get CCA treated lumber, except by visiting a Marine Lumber Supplies store. The pressure treated stuff in the Home Despot is different mix of chemicals. it has the added benefit of rotting out any nails used to fasten it. Nails now need to be double galvanized to last.

 

[jigngrub]

Re: Decking Materials

Jig, In NJ we cannot get CCA treated lumber, except by visiting a Marine Lumber Supplies store. The pressure treated stuff in the Home Despot is different mix of chemicals. it has the added benefit of rotting out any nails used to fasten it. Nails now need to be double galvanized to last.

It's the same everywhere Chris, CCA is for marine use only now. The other pressure treated stuff is ASQ and it's murder on metal and fasteners.

CCA is hard to find, especially if you don't know where to look. If someone needs some the best place to start looking is at boat dealerships that have a service dept, they can usually tell you where to find it.

CCA won't rot even if it gets wet and I think all boats should be made with it. Light, strong, and won't rot... what's not to love about it?