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Quick Answers

What does BCX plywood mean?
BCX stands for B-grade front veneer, C-grade back veneer, and X for exterior-rated adhesive. The B face has a smooth, sanded surface with minimal patches, making BCX a good choice when one side of the panel needs a clean appearance while the other side remains concealed.
What is BCX plywood used for?
BCX is commonly used for exterior sheathing, soffits, shelving in covered outdoor areas, and underlayment where one visible face is needed. It is also used for concrete formwork on projects where a reasonably smooth concrete finish is desired without the cost of film-faced panels.
Is BCX plywood waterproof?
BCX uses exterior-grade (X-type) adhesive that resists moisture and intermittent wetting, but the wood itself is not waterproof. For prolonged water exposure, the panel should be sealed with an exterior sealant or polyurethane. For fully waterproof applications, marine-grade plywood is recommended.
How does BCX compare to CDX plywood in price?
BCX typically costs 10 to 20 percent more than CDX for the same thickness because of the higher-quality B-grade face veneer. CDX is the more economical choice for hidden structural applications, while BCX is worth the premium when one side needs a smoother finish.