Like Tree0Likes

Marine Plywood

Reply
Old 03-01-2003, 01:40 PM
  #1
Registered
Thread Starter
 
RUSSSR1's Avatar
 
Join Date: Jul 2001
Location: Arlington Hts. Il.
My Boats: 38 Cig Flatdeck
Posts: 693
Default Marine Plywood

Who supplies marine plywood in the Chicago area? I took off my silent thunder swim platform to replace a gasket and found the top back side rotten. At least that explanes the gasket I have some PIC's I will try and download them latter.
RUSSSR1 is offline  
Reply With Quote
Old 03-01-2003, 02:17 PM
  #2
Registered
 
Join Date: Feb 2001
Location: EGG HARBOR TOWNSHIP, NJ
My Boats: 2004 PANTERA SURVIVOR
Posts: 513
Default

home depot,lowes or any other lumber yard
Treadwellmotorsports is offline  
Reply With Quote
Old 03-01-2003, 05:55 PM
  #3
Charter Member #415
Charter Member
 
Join Date: Nov 2000
Location: Jasper,Alabama
My Boats: 1968 Switzer Shooting Star,1967 Switzer Shooting Star,1963 Glasspar G-3
Posts: 3,357
Default

Don't waste the money on "marine plywood",it's too expensive and is no better than exterior plywood cause you will resin coat it anyway.
Magicfloat is offline  
Reply With Quote
Old 03-01-2003, 06:40 PM
  #4
Banned
 
cuda's Avatar
 
Join Date: Sep 2001
Location: Deland, Florida
Posts: 25,191
Default

I've been told the only difference between marine and exterior plywood is that the voids are filled with glue.

I built a new engine cover with regular plywood and then painted it with a material we use to waterproof floors. It sat on the side of the house uncovered for 6 months with no adverse effects. It even seals up the cracks between the boards and fills the screw countersinks.
Attached Thumbnails
Marine Plywood-sized.jpg  
cuda is offline  
Reply With Quote
Old 03-01-2003, 06:53 PM
  #5
Offshoreonly Advertiser
Offshoreonly Advertiser
 
Mbam's Avatar
 
Join Date: Mar 2001
Location: Pompano Beach FL, USA
My Boats: 1972 Cigarette 36 race
Posts: 2,048
Default

Aetna Plywood, on Elston. Not sure if they are wholesale only, but they have just about everything.
__________________
Marc

www.mercruiserparts.com
www.go-fast.com
www.bammarine.com
www.cyborgtransmissions.com
It's alive -www.BoatStuffExpress.com - additional 10% discount for OSO members
Mbam is offline  
Reply With Quote
Old 03-01-2003, 07:32 PM
  #6
Registered
Thread Starter
 
RUSSSR1's Avatar
 
Join Date: Jul 2001
Location: Arlington Hts. Il.
My Boats: 38 Cig Flatdeck
Posts: 693
Default

Thanks guys

Can I use pressure treated plywood? what's the special deal with marine plywood? Could it be bad to seal pressure treated wood?

Got to go to Kodak and download some software, you can never find those disks once you open the box.
RUSSSR1 is offline  
Reply With Quote
Old 03-01-2003, 08:49 PM
  #7
KN
Registered
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Default

I would stay away from pressure treated plywood. There is a huge difference between an exterior grade plywood and marine plywood. Better glue, more ply's, no voids, the grain, it is made with different species that are stronger, resist water and bugs better. Marine plywood is a much better product.

Go on www.boatdesign.net and ask what you should use for your application. They have a message board.

Kirk

Last edited by KN; 03-01-2003 at 08:52 PM.
KN is offline  
Reply With Quote
Old 03-01-2003, 10:16 PM
  #8
Registered
 
Playn's Avatar
 
Join Date: Jan 2001
Location: BRENTWOOD, TN
Posts: 4,367
Default

From Georgia Pacific;

Marine-grade plywood is a specially designed panel made entirely of Douglas-fir or Western Larch. The grade of all plies of veneer is B or better, which means it may have knots, but no knotholes. The panels are sanded on both faces, and are also available with Medium Density Overlay (MDO) or High Density Overlay (HDO) faces. The maximum core-gap size permitted is 1/8 inch. Its exposure durability rating is EXTERIOR and the glue used is a fully waterproof structural adhesive. It is considered a "premium" panel grade for use in situations where these characteristics are required, i.e., for boat hulls and other marine applications where bending is involved.

Marine-grade plywood is not treated with any chemicals to enhance its resistance to decay. If decay is a concern, it should be pressure-preservative treated to an appropriate standard.

The detailed description of veneer grades and Marine-grade plywood is contained in Voluntary Product Standard PS 1-95: Construction And Industrial Plywood.

APA Marine-Plywood:

Thicknesses Minimum Number of Plies Minimum Number of Layers
1/4" 3/8" 3 3
1/2" 5/8" 3/4" 5 5


*A layer is a single veneer ply, or two or more plies laminated with grain direction parallel In each ply

APA Marine-Edge Grade Stamp

MARINE A-A EXT-APA 000 PS 1-95

Popular APA Marine-Grades: A-A, A-B and B-B

Marine-grade plywood is available in 4x8-foot sheets of 1/4, 3/8, 1/2, 5/8 and 3/4-inch thickness. Sheets up to 5x12 feet are also available. Available grades are A-A, A-B, B-B (face-back), MDO and HDO.

There are a few Wholesalers in the Chicago area. If they can't help you out directly they can probably get you to someone who stocks what you are looking for.

Aetna Plywood Inc. 1731 N. Elston Ave. Chicago, IL 60622 773-276-7100

Plywood Town Wholesale Supply Co. 1815 W. Division Chicago, IL 60622 773-278-6407

Carlson Plywood Co. Inc. 8890 67th Hodgkins, IL 60525 708-354-8200
Playn is offline  
Reply With Quote
Old 03-02-2003, 01:39 AM
  #9
Charter Member #232
Charter Member
 
Audiofn's Avatar
 
Join Date: Oct 2000
Location: Carlisle, MA USA
My Boats: 1979 Formula 302, 99 Formula 353, 81 Donzi 18 2+3 with 454
Posts: 18,379
Default

If you can get Mahogony plywood I have been told it repels water MUCH better. Other then that I have also been told that there is no difference btwn the glues and what not in different plywooods. That being said I just picked up some Marine Mahogony for my fairing project so go figure

Jon
__________________
Put your best foot forward!
Audiofn is offline  
Reply With Quote
Old 03-02-2003, 08:04 PM
  #10
Registered
Thread Starter
 
RUSSSR1's Avatar
 
Join Date: Jul 2001
Location: Arlington Hts. Il.
My Boats: 38 Cig Flatdeck
Posts: 693
Default

Wow a lot of opinions. I would believe that there must be an advantage to marine ply But as said in case, when it is encapsulated in resin you would think anything would last. Still if you are going to do anything you should use the best materials you can get your hands on.

The crack that started it all
Attached Thumbnails
Marine Plywood-boat2crack.jpg  
RUSSSR1 is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
DKerns
Fiberglass and Paint
9
12-01-2006 12:50 PM
jackhammer
Fiberglass and Paint
22
05-13-2006 07:50 AM
FunHome
General Q & A
26
03-04-2004 07:29 AM
283CHECK
General Q & A
2
03-11-2002 04:33 PM
mltdwn12
General Q & A
7
03-11-2002 09:23 AM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 02:15 PM.


Copyright 2011 OffShoreOnly. All rights reserved.