Direction of grain pattern Uncoated plywood can be distinguished by direction of grain pattern of the sheet: Short grain – grain pattern is parallel to the shorter side of the sheetLong grain – grain pattern is parallel to longer side of the sheet

Sanded or unsanded plywood Uncoated plywood is produced with either a sanded or unpolished surface. Sanded plywood is produced in different quality grades: The quality grades for plywood with interior glue are I, II, IIIThe quality grades for plywood with exterior glue are E, B, S, BB, CP, WG Unsanded plywood is produced also either with interior or exterior glue: The quality …

“Exterior”  “Interior” plywood Exterior (WBP) plywood is suitable for use in external conditions. The glue used in this type of plywood (phenol-formaldehyde resin) is water-resistant. NB! Waterproof glue ensures that the veneer layers do not separate under the influence of water, but the outer surface of the board itself is not waterproof, so the board should be covered with a paint, varnish or …