Base and middle core for 3-layer flooring is made of birch. The hardness of birch is close to top layer made of oak, ash, or American walnut and the thickness base layer. That provides the perfect symmetry and balance, and eliminates any chance of cupping and warping in case of temperature or humidity fluctuations. The main features of the Coswick 3-Layer T&G Engineered Flooring are as follows:

• 3-layer construction with cross-laid interconnected middle core flooring is much less shrinks and expands at humidity variation and has a wider range of applications in comparison to solid flooring.

• Birch is used for middle core and base lamella. Base lamella has increased the thickness of 3 mm. This helps due to better symmetry to enhance the internal balance of hardwood planks and reduce twisting or warping.

• Cork compensators are added every 15 cm to balance internal stress in case of moisture effect and as a result, helps flooring to withstand to humidity fluctuations.

• The top wear layer is 4 mm and can be sanded up to 4 times. Coswick uses only sawn lamellas for the top layer. Sawn hardwood lamellas have no internal checks that could cause face splits later on. Sawn hardwood lamellas are 100% solid wood and preserve the rich grain texture appearance.

• High-adhesion hot-melted polyurethane glues are used to bond lamellas and middle core together. Extra strong bonding ensures that no delamination occurs even under extreme moisture conditions or flooding. Coswick polyurethane adhesives are 100% formaldehyde free and are environmentally friendly.

3-layer engineered tongue-groove flooring can be installed below, on or above ground. Can be installed on heated floors. The flooring can be glued down over concrete, plywood or wooden subfloor or nail down over wooden subfloor.