Oak floors
Layered boards for underfloor heating
Layered board
Sizes:
Thickness (in mm): 11/3; 13/3; 14/4
Widths (in mm): 140; 160; 180; 220; 240
Lengths (in mm): 600-2100 with a predominance of 1500+ boards
Classic herringbone
Sizes:
Thickness (in mm): 13/3; 13/4
Widths (in mm): 70; 100; 120; 130
Lengths (in mm): 490; 600; 900
French/Hungarian herringbone
Sizes
Thickness (in mm): 13/3; 13/4
Widths (in mm): 70; 100; 120; 130
Lengths (in mm): 490; 600; 900
Ladder
Sizes
Thickness (in mm): 13/4
Widths (in mm): 130; 150; 170; 190
Lengths (in mm): 600; 900; 1200; 1800
Wood classes
AB
Class AB
Boards with naturally varied wood color and structure.
Permissible: Any grain. Pin knots, sound, fused knots, naturally cracked knots up to 30 mm, black knots up to 15 mm. Knot holes filled. Gloss without limits. Surface cracks up to 1 mm wide and 20 mm long filled with filler. Deadwood, bark, and blemishes up to 4 mm wide and 30 mm long.
Unacceptable: Sapwood and knot holes filled with putty larger than 10 mm in diameter. Frontal cracks, pith, and insect galleries.
Unacceptable: Sapwood and knot holes filled with putty larger than 10 mm in diameter. Frontal cracks, pith, and insect galleries.
CD
CD Class
Knotty boards with varied colors and wood structures.
Permitted: Any color and grain. Sound knots without any size or quantity restrictions. Knot holes filled with filler up to 25 mm in diameter, for boards from 220 mm wide to 35 mm in diameter. Discolored, knot-free boards up to 20% of the order. Gloss without restrictions. Deadwood, bark, and blemishes up to 25 mm wide and 200 mm long. Internal and external sapwood sound and discolored. Core free of transverse or radial cracks. Frontal cracks up to 200 mm long and 10 mm wide, and surface cracks up to 120 mm long and 6 mm wide. All defects filled.
Underfloor heating
Engineered floorboards are recommended for use with underfloor heating because they better withstand fluctuations in temperature and humidity levels. When using underfloor heating, it's important to use appropriate flooring chemicals and ensure the proper operation of the underfloor heating system, according to the floorboard manufacturer's instructions.