Unfilled and sanded veneer with a maximum of three plugs per M2.

Small open knots may exist and few hair cracks are also allowed. Natural discolouring is marginally allowed.

Examples of plugs, discoloura�on, streaks and grain irregulari�es.Colour contrast of plugs will vary and can change depending on viewing angle and ligh�ng condi�ons.Plugs shown are oval and batwing shapes and are 60mm across.

Specialised Panel Products Ltd - Registered in England & Wales under 3500652

Photos are for indica�ve purposes only. Colours may vary and are dependant on individual screen se�ngs.

BB Grade Birch Plywood

B Grade Birch Plywood

Predominantly unfilled and sanded veneer to which all major defects are replaced with wood plugs.

A restricted number of solid minor knots are admissable along with small, closed splits.

Some brown stain permi�ed. Allow for colour varia�ons.

P A N E L P R O D U C T SSPECIALISED 01992 410333

mail@specialisedpanels.co.uk

01992 410333

mail@specialisedpanels.co.uk

Grade B Grade BB Grade

Pin knots (3mm or less) Permi�ed Permi�ed

Sound intergrown knots ≤6mm dia ∑≤12mm /m² ≤25mm dia ∑≤60mm /m²

Unsound adhering knots Not permi�ed Not permi�ed

Other knots and holes Not permi�ed Permi�ed ≤6mm dia ∑≤25mm /m² repaired

Irregulari�es in the structure Permi�ed, but slight Permi�edof the wood

Curly grain Not permi�ed Permi�ed

Open splits and checks Not permi�ed Permi�ed for an individual width up to 2mm and of an individual length ≤200mm and ≤1 per meter of panel width, repaired

Closed splits and checks Not permi�ed Permi�ed for an individual length up to 200mm and in number up to 2 per meter of panel width

Discoloura�on Permi�ed, but slight (not at the edges of the panel)

≤15% of the panel surface

Discoloura�on and Not permi�ed Permi�ed up to an extent of 30% coloured streaks of the panel surface

Brown (but not rot) Not permi�ed Permi�ed up to an extent of 30% of the panel surface

Inserts (repair plugs) Permi�ed, up to 3 plugs per M2 Permi�ed up to an extent of 3% of the panel surface

Open joints Not permi�ed Permi�ed to an individual width up to 2mm, and of an individual length ≤200mm and ≤1 per meter of panel width, repaired

Imprints and bumps Not permi�ed Permi�ed, but slight. 2cm² per panel

Roughness Not permi�ed Permi�ed but slight (up to 10cm²/m², repaired) three defects per panel

Sanding through Not permi�ed Permi�ed ≤10cm²/m²

Glue penetra�on Not permi�ed Permi�ed up to an extent of 5% of the panel surface

Total number of permi�ed defects ≤3 ≤9