Is Marine plywood a must? - Page 5 - SailNet Community
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post #41 of 42 Old 2 Weeks Ago
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Re: Is Marine plywood a must?

After reading all the good and bad advice on this topic here's a page with good reliable information about the various distinctions between plywood "standards" you might choose to use on boats and semi dry structures()

https://www.christinedemerchant.com/...od_grades.html

just a caveat: good exterior plywood used in boat work needs to be hand picked for quality regardless of grading stamps. Avoid wide plies and any significant voids. If using junk, use a saturating(thin) epoxy or polyester resin to seal all edge grain and you should be fine. Starboard does not glue reliably even when "flame treated"....Most Baltic birch now available does not pass the bucket testlet alone survive a true boil test like it did back in the late 70's (glory days of Baltic Birch!) Structurally American Marine fir plywood is still great when you can find the good stuff thousands of boats were built with it including PT boats! Rot resistance has nothing to do with Marine designation and compliance with any of these standards is voluntary..purely good faith amongst the industry.
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post #42 of 42 Old 2 Weeks Ago
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Re: Is Marine plywood a must?

Quote:
Originally Posted by baywater View Post
...Most Baltic birch now available does not pass the bucket testlet alone survive a true boil test like it did back in the late 70's (glory days of Baltic Birch!)
please give references

The OP was not looking for a material to be continuously submerged or wet. For his application Baltic Birch is the ideal material.

pay attention... someone's life depends on it

Last edited by SanderO; 2 Weeks Ago at 08:31 PM.
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