Cabinet grade plywood in the UK
“Cabinet grade plywood” is an American phrase, not a standard. It means plywood good enough to build furniture from: a clean face, a core without gaps, and edges that machine cleanly. In the UK the same board is ordered by three things — face grade, use class and core — and this page explains each.
There is no grade called “cabinet grade”
No British or European standard defines it. Suppliers use it for plywood with hardwood faces, few voids in the core and a face fit to show or paint. When you order, say what you need instead: the face grade, the use class and the species of the core.
Face grades: B, BB, CP and C
| Grade | What the face looks like | Typical use |
|---|---|---|
| B | Uniform; only small knots and a few neat repairs | Clear-finished doors and visible panels |
| BB | Small knots and neat wooden patches allowed | Painted cabinets, shelving, carcasses |
| CP | Unlimited patches and sound knots, no open defects | Backs of panels, hidden parts |
| C | The lowest grade: open defects allowed | Where appearance does not matter at all |
Grades are written face first, back second: B/BB is a B face with a BB back, BB/CP a BB face with a CP back. The letters come from the grading of birch plywood under EN 635; other plywoods are graded differently, so ask what the letters mean on the board you are quoted.
A grade is about looks, not strengthB/BB is not stronger than BB/CP. Strength and stiffness come from the species, the number of plies and the glue; the face grade only describes the surface.
Use classes: EN 636-1, 2 and 3
| Class | Conditions | For furniture |
|---|---|---|
| EN 636-1 | Dry: indoors, no risk of wetting | Living rooms, bedrooms, offices |
| EN 636-2 | Humid: protected, can get damp | Kitchens, bathrooms, the cabinet under a sink |
| EN 636-3 | Exterior: exposed to the weather | Outdoor furniture, with an exterior finish |
The class depends on the glue bond tested under EN 314: a board cannot claim a higher EN 636 class than its bond class. EN 636-2 boards are widely stocked; for a kitchen, ask for at least that.
Birch or hardwood-faced
Birch plywood
Birch veneers all the way through. Tight, void-free edges that can be left on show; stiff and heavy. Often sold as 1525 × 1525 or 2500 × 1250 as well as 8x4.
Hardwood-faced
Hardwood face veneers over a lighter core such as poplar. Lighter and usually cheaper; the core can have gaps, so band or lip the edges.
Veneered faces
Oak, walnut or other decorative faces on a plywood core, for a natural-wood finish. Order the face and back grade like any other.
Plywood, MDF or MFC for cabinets?
| 18 mm board | Longest bookshelf, 300 mm deep | One 8x4 sheet | Edges |
|---|---|---|---|
| Birch plywood | 736 mm | 36.4 kg | Can be left on show |
| MDF | 525 mm | 39.7 kg | Painted or banded |
| MFC | 474 mm | 34.8 kg | Edge banding needed |
Spans keep sag below span/600, from typical stiffness figures; weights use typical densities. Birch plywood is the stiffest of the three and keeps screws best near an edge; MDF paints the best; MFC comes already finished and is the usual choice for kitchen carcasses. Compare more thicknesses in the thickness guide.
Ordering in four steps
- Pick the faceB/BB for a clear finish, BB/BB for paint, BB/CP for parts nobody sees.
- Pick the classEN 636-1 for dry rooms, EN 636-2 for kitchens and bathrooms.
- Pick the thickness18 mm for carcasses; check shelves against their span.
- Plan the sheetsEnter the parts in the optimiser on the sheet size you can buy, and order the number of sheets the layout needs — see how many sheets.
Questions
What is cabinet grade plywood called in the UK?
There is no single name. Ask for the face grade, use class and core instead, for example “18 mm BB/BB birch plywood, EN 636-2”.
Is birch plywood good for kitchen cabinets?
Yes, where you want plywood: it is stiff, holds fixings well and its edges can be left on show. For a kitchen choose at least EN 636-2.
What does B/BB mean on plywood?
A B-grade face with a BB-grade back: the first letter is the better side. It describes appearance only.
Which is better for cabinets, plywood or MDF?
Plywood is lighter for its stiffness and stronger near edges; MDF is flatter to paint and cheaper. Many cabinets use plywood carcasses with MDF doors.
Plan your cut list now
Free, in the browser, with no account. Layouts, edging totals and machine files from one list.