You'll be fine kerfing it if you have to but because the kerfs will be on the outside radius, you will weaken it more than the pieces in my case. If you were to glue anything, even a veneer or thin strip around the back after bending it would help. All in all the best would be two 1/4" pieces if you can manage it.
Varnish isn't much of a sealer but you're planning to take care of the boat so I wouldn't expect any problems.
My photos are all posted right side up. Glad you liked the post.
Paul M
Marine grade plywood
Moderator: admin
-
shipwright
- Platinum Member
- Posts: 1165
- Joined: Tue Dec 15, 2009 7:28 pm
- Location: Vancouver Island, Canada
- Contact:
I'm a big fan of West System marine-grade epoxy for sealing items like this:
http://www.westsystem.com/
I've used this stuff for years for exterior work on my house...it's a great product for sealing, fairing, and even structural repairs.
http://www.westsystem.com/
I've used this stuff for years for exterior work on my house...it's a great product for sealing, fairing, and even structural repairs.
'78 Mark V 500 #27995 (my Dad bought new)
'82 Mark V 500 #96309
Two '47 10E's (serial#4314+6149) - one a dedicated drill press and the other a lathe
Two 10E/ER in parts slowly being restored…#26822 and #????? (SS plate missing)
SPT's: Bandsaw, Belt Sander, Strip Sander, Jointer, Jigsaw, Biscuit Joiner
'82 Mark V 500 #96309
Two '47 10E's (serial#4314+6149) - one a dedicated drill press and the other a lathe
Two 10E/ER in parts slowly being restored…#26822 and #????? (SS plate missing)
SPT's: Bandsaw, Belt Sander, Strip Sander, Jointer, Jigsaw, Biscuit Joiner
This is true, but it brings up another point. The boating industry has been moving away from using wood (even marine grade) in structural components because as soon as you get a crack you start the rotting process. It's been basically eliminated other than the transom board on tiller models and ultra-economy boats. All of our decks, hatches, etc. are now made out of aluminum or poly. That might be out of your budget, but if you're concerned with longevity of the plywood then its a good option.shipwright wrote:They weren't rotting because they weren't marine plywood. They were rotting because they were allowed to be alternately wet and dry with fresh water.
West Systems makes a good product, but epoxy resin and catalyst is really a commodity and they have a huge markup because of good distribution and simple instructions the lay person can follow. Even G\Flex is overhyped and overpriced, its just epoxy resin and fast hardener which gives you the worst result of all hardeners (but is the easiest to work with).dgale wrote:I'm a big fan of West System marine-grade epoxy for sealing items like this:
http://www.westsystem.com/
I've used this stuff for years for exterior work on my house...it's a great product for sealing, fairing, and even structural repairs.
If cost is an issue, and it always should be, check out US Composites. Similar products, half the price. I don't personally use them because I have a wholesale account elsewhere, but they are a good place to go if you are needing anything more than a half gallon.
-
shipwright
- Platinum Member
- Posts: 1165
- Joined: Tue Dec 15, 2009 7:28 pm
- Location: Vancouver Island, Canada
- Contact:
frank81 wrote:This is true, but it brings up another point. The boating industry has been moving away from using wood (even marine grade) in structural components because as soon as you get a crack you start the rotting process. It's been basically eliminated other than the transom board on tiller models and ultra-economy boats. All of our decks, hatches, etc. are now made out of aluminum or poly. That might be out of your budget, but if you're concerned with longevity of the plywood then its a good option.
Call me a traditionalist. It's an argument I will avoid. I'll stick with my signature line on the other forum:
"If God had wanted us to have fiberglass boats, he would have given us fiberglass trees"
Paul M
Paul M ........ The early bird gets the worm but the second mouse gets the cheese
Haha I'm with you there, but he also didn't give us aluminum trees. And its hard to make a 100ft motor yacht with 5000+ hp out of wood. If its any consolation, the nice ones get teak decks and exotic wood interiors.shipwright wrote:Call me a traditionalist. It's an argument I will avoid. I'll stick with my signature line on the other forum:
"If God had wanted us to have fiberglass boats, he would have given us fiberglass trees"
Paul M
When I was working in fiberglass and living on the coast, I was going to build a 24' sailboat that slept 4 from plans published in the 1940's in Popular Mechanics. No modern tools or materials, even the laminated parts were glue and canvas. Had a few construction engineer buddies that were into the whole antique handtools and woodworking thing that gave me the idea. That's actually the reason I bought the SS to begin with.
alternative
What about buying some veneers and laying up a laminated piece to fit the bill? Just thinking outloud.
'55 Greenie #292284 (Mar-55), '89 SS 510 #020989, Mark VII #408551 (sold 10/14/12), SS Band Saw, (SS 500 #36063 (May-79) now gone to son-in-law as of 11-11), Magna bandsaw, Magna jointer 16185 (May-54), Magna belt sander SS28712 (Dec-82), Magna jigsaw SS4397 (Dec-78), SS biscuit joiner, Zyliss (knockoff) vise, 20+ hand planes, 60s Craftsman tablesaw, CarbaTec mini-lathe, and the usual pile of tools. Hermit of the Hills Woodworks, a hillbilly in the foothills of the Ozarks, scraping by.