Grades & Certification · Overview
Different Grades of Plywood Explained
"Grade" can mean two different things on a plywood label — the veneer face quality (A/B/C/D) and the adhesive/moisture rating (MR/BWR/BWP) — and buyers often mix the two up.
| Face Veneer Grade | What It Means |
|---|---|
| A-Grade | Smooth, defect-free face with few or no visible knots — used where appearance matters most |
| B-Grade | Minor visible imperfections, neatly filled — a good balance of appearance and cost |
| C-Grade | Visible knots and patches, more utilitarian appearance — fine where the face won't be seen |
| D-Grade | Lowest visual grade with the largest allowed defects — used purely for structural, hidden applications |
Moisture Grades and Specialty Grades
Moisture / Adhesive Grades
MR, BWR and BWP describe the adhesive's water resistance — a completely separate scale from the A/B/C/D face-quality grading.
Marine & Fire-Retardant Grades
Specialty treatments layered on top of a base moisture grade for specific performance needs — sustained water exposure or fire compliance.
Flexible & Shuttering Plywood
Purpose-built specialty grades — flexible plywood for curved applications, shuttering plywood for concrete formwork — outside typical furniture use.
Decorative Grade
Optimised specifically for finish quality and appearance, often paired with a higher face veneer grade for visible furniture surfaces.
Reading Both Grades Together
A sheet's full spec is really the combination of both scales — for example, a BWR-grade sheet with a B-grade face is a sensible, cost-effective choice for a wardrobe interior, while an A-grade BWP sheet suits a premium, visible kitchen application. See our MR vs BWR vs BWP grade guide for the moisture side in depth, and our decoding plywood labels guide for spotting both grading systems on the sheet itself.
Frequently Asked Questions
What's the difference between plywood grade and plywood quality?
Grade typically refers to the veneer face quality (A/B/C/D) or moisture resistance (MR/BWR/BWP) as formally classified, while quality can also include workmanship factors like core gaps or adhesive consistency within a given grade.
Is A-grade plywood the same as BWP-grade plywood?
No — A-grade refers to face veneer appearance quality, while BWP refers to moisture/adhesive resistance; the two are independent scales, and a sheet can be any combination of the two, such as A-grade BWP.
Which plywood grade is best for furniture I won't see the back of?
A lower face grade like C or D is perfectly fine for hidden or structural surfaces, since the visual defects that lower the grade don't affect strength — save the higher face grades for visible surfaces.
What is shuttering plywood used for?
It's a specialty grade designed for concrete formwork in construction, built to withstand repeated use and the pressure of wet concrete rather than for furniture applications.
Do I need to specify both grading systems when ordering plywood?
Yes, ideally — specifying both the face veneer grade and the moisture grade ensures you get a sheet that matches both the appearance and performance your project actually needs.
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