At the KLH factory, planks of kiln-dried, finger-jointed spruce are sorted and cut into sheets of up to 16.5m by 2.95m.  These sheets are then stacked and glued under high pressure in perpendicular layers.  Depending on the purpose and static requirement, the panels are available in 3, 5, 7 or more board layers.  The panels can be supplied with three different grades of top layer - non-visual, industrial grade visual, and domestic grade visual.

The process we use to manufacture engineered cross-laminated timber panels involves a number of innovations that set the product apart - the most notable of which is a high-pressure bonding system which allows the use of polyurethane adhesive in the boards.  This solvent-free and formaldehyde-free adhesive ('o' emission class) is able to achieve a very high quality level of adhesion, with no risk of toxic emissions at any stage in the product's life cycle.  This process has been tested in accordance with DIN 68141 and other strict criteria by MPA Stuttgart and approved for the production of load-bearing timber construction elements and special construction methods in accordance with DIN 1052 and EN 301. Crosswise gluing at high pressure reduces the wood's expansion and shrinkage to an insignificant level.

The panels are cut and processed using CNC technologies, resulting in excellent dimensional stability, both in overall panel size and for structural openings.

The panels are tested in accordance with the product's European Technical Approval.  Two cores are taken from batch of panels and these are subsequently tested to extremes of climactic conditions (oven baking and boiling in water- simulated lifespan of up to 80 years); and for strength/ structural properties (shear testing and crushing).