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Guide · Plywood

Plywood face grades,explained.

A plywood sheet is graded by the quality of its two outer veneers: the face and the back. A pair such as B/BB means a B face and a BB back. Knowing the grades lets you buy exactly the surface you need, and not pay for one you do not.

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Face grades

From flawless to structural.

GradeFace qualityTypical uses
EPractically without defectsPremium furniture, visible surfaces
BSmooth, minimal defects, small sound knots allowedFurniture, interiors, decoration
BBKnots and defects repaired with veneer patchesFurniture, transport, packaging, interiors
CPFlat surface, patches and discoloration allowedConstruction, vehicle floors, flooring base
CNatural defects allowed, full bond strengthConstruction, packaging, crates

Common pairs

Face and back together.

PairWhat it meansTypical uses
B/BBNear-clear face, patched backFurniture where one side shows
BB/BBPatched on both sidesFurniture, interiors, transport
BB/CPPatched face, utility backVehicle and wagon building, packaging
CP/CPUtility surface on both sidesFlooring base, construction
C/CStructural, defects allowedConcrete formwork backing, crates

Beyond the face

Glue, surface and emissions.

ParameterCommon optionsWhat to check
GlueExterior WBP (phenolic) or interior MRUse WBP for moisture and outdoor exposure
Bond classEN 314 class 1, 2 or 3Class 3 for exterior use
SurfaceSanded (S2S) or unsanded; film-facedFilm weight and colour for formwork and floors
Emission classE1, E0.5, CARB compliantThe rule in your destination market
Thickness toleranceStated per thickness in the contractCritical for flooring and machining

Your checklist

What to put inyour specification.

  1. Species and construction (for example, all birch)
  2. Face and back grade pair
  3. Thickness and sheet size
  4. Glue type and bond class
  5. Surface: sanded, unsanded or film-faced
  6. Emission class required in your market

Please note

Typical parameters only.

This guide explains parameters commonly used in international trade, for orientation. It is not a specification, an offer or a statement of available goods. Every deal sets its own specification in the written contract.

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