Nature provides different structures and grains, which we sort into four categories or grades: Diamonds, Hearts, Spades and Clubs.
The grades are of identical quality. Knots are not defects, but are natural components of the tree where the branches have formed. The knotty area is the heartwood and is especially hard.
The images shown below are all European Oak 3-Strip (L)
The most rustic looking board with the greatest number of knots and colour variation.
Fewer and smaller knots and less colour variation than the diamonds grade.
Occasional small knotting but with colour variation.
CLUBS GRADE
The least number of knots and the least colour variation.
Fletcher Flooring Ltd t/a Berg & Berg.co.uk. Registered in England Number: 4642871. VAT Number: 808 314149.
Berg & Berg.co.uk 2012