Asked by: Amedeo Turatbekovhobbies and interests woodworking
Is exterior plywood the same as marine plywood?
Last Updated: 2nd March, 2020
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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, does marine grade need plywood? Marine Grade Plywood for Boat Building In some ways it would make most sense for the plywood suitable for boat building to be the only plywood with a marine grade label. Alas this is not so. As far as water resistance, plywood that is BS1088 (or better) should be a must in order to ensure long term durability.
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.
What is marine grade plywood?
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.