PLYWOOD QUALITY CLASSES https://www.woodproducts.fi/content/plywood
The choice of quality class of birch veneer-surfaced plywoods according to application (in brackets, the other generally used quality class) is presented in the table below.
|Birch veneer-surfaced plywoods|
|A (E)||flawless special quality (only available to a limited extent)|
|B (I)||lacquered or waxed surface|
|S (II)||paintable surfaces|
|BB (III)||normal quality, for example under coverings, the most common quality in structures|
|WG (IV)||for less demanding applications, a quality that cannot be repaired|
The choice of quality class of conifer plywoods according to application is shown in the table below.
|E||flawless quality, only pine-surfaced|
|I||almost flawless quality, only pine-surfaced|
|II||downstream quality with an intact surface|
|III||non-repairable quality for construction|
|IV||non-repairable quality for construction (background surface quality)|