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Asked by: Amedeo Turatbekov
hobbies and interests woodworkingIs exterior plywood the same as marine plywood?
Consequently, what is the difference between marine grade plywood and exterior grade plywood?
Re: marine grade vs exterior grade Marine-grade plywood is made entirely of Douglas-fir or Western Larch. The grade of all plies of veneer is B or better. B-grade veneer may have knots but no knotholes. A-grade veneer has no knots or knotholes.
Also asked, can I use marine plywood outside?
Total immersion -- When building a cistern or other outdoor vessel to hold water, use marine-grade plywood. This type of plywood is too expensive for most other uses, but is the only choice when the application calls for it to be underwater.
Marine-grade plywood, often simply called marine plywood, is not what it's often claimed to be. Marine-grade plywood is a specially designed panel made of Douglas fir or Western Larch, according to APA: The Engineered Wood Association. All plies may have knots, but no knotholes.