Engineered Oak Chevron Parquet flooring can be laid over underfloor heating Installation must be glued down to sub floor
This board is guaranteed over electric or water fed under floor heating when heating elements are in a screed.
Prime/A.B. Grade Wood Flooring is a mix of A.B grade please see list below
Classic Grade Wood Flooring is mill run grade which is a mix of B.C.D grade with small proportion of A grade.
Country Grade Wood Flooring is a mix of CDE grade
Antique distressed Grade Wood Flooring is a mix of DEF
Grades A-F described
A—without knots and sapwood, uniform colour, sometimes small knots up to max.2mm allowed.
B—with knots up to max.2-4mm, no sapwood, harmonic-natural colour;
C—with knots up to max.6 cm, sapwood max 15%, natural colour;
D—with knots up to 8cm, and max.30% sapwood, allow a wide range of colour variation.
E — with knots up to 10cm, allow cracks up to 30cm in the middle of the boards (max 5mm wide) and end cracks max 25cm (max 8mm wide), allow a wider range of colour variation
F — with crack less than 15-20mm wide in the middle of the boards, longest crack shorter than 80%of the board length