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Home > Quality Standards > Solid Wood Flooring
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Oak/Ash | Maple/Birch/Beech | Kempas/Merbau/Walnut | Bamboo
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[G] look up term in glossary.

Oak/Ash°°°°°°
Defects Top Face Back Face
Grade A Grade B Grade C
Live knot [G] 2 allowed, diameter °‹ 5 mm;plank length °‹ 500 mm 2 allowed, every 500 mm of plank's length;5 mm °‹ diameter °‹ 20 mm
Not restricted as long as diameter °‹ 20 mm
Not restricted in size or number
Dead knot [G] Not allowed 1 allowed, every 500 mm of plank's length; diameter °‹ 4 mm 5 allowed, diameter °‹ 10 mm Not restricted as long as diameter °‹ 20 mm
Wormholes [G] Not allowed Not allowed 5 allowed, diameter °‹ 2 mm (mending) Not restricted as long as diameter °‹ 15 mm
Brown line [G] Not allowed Not restricted Not restricted Not restricted
Sapwood [G] Not allowed <10% of plank's area Not restricted Not restricted
Rot [G] Not allowed Not allowed Not allowed Area of initial rot °‹ 20%
Wane [G] Not allowed Not allowed Not allowed Length °‹ 30% of plank's length; Width °‹ 20% of plank's width
Crack [G] Not allowed Not allowed 2 allowed, width °‹ 0.1 mm; length °‹ 15 mm
Not restricted in number; width °‹ 0.5 mm; length °‹ 50 mm
Cut and chatter mark [G] Not allowed Not allowed Not distinct Not restricted
Indentation Not allowed Slight Slight Not restricted
Scratches on varnish Not allowed Slight Slight Not restricted
Blister [G] Not allowed Not allowed Not allowed Not restricted
Exposed undercoat [G] Not allowed Not allowed Not allowed Not restricted
Pin holes Not allowed 3 allowed, diameter °‹ 0.5 mm 3 allowed, diameter °‹ 0.5 mm Not restricted
Wrinkling [G] Not allowed Not allowed < 5% of plank's area Not restricted
Nib [G] 2 allowed, length °‹ 500 mm;5 allowed, length > 500 mm 4 allowed, length °‹ 500 mm;8 allowed, length > 500 mm 4 allowed, length °‹ 500 mm;8 allowed, length > 500 mm Not restricted

TOLERANCE ON DIMENSIONS

Length +/-1.0 mm
Width +/-0.15 mm
Thickness +/-0.20 mm
Tongue's length °› 4.0 mm
Tongue & groove °‹ 0.4 mm
Note: Length and width of planks refer to the respective measurements without including the length of the tongue on the length or width of the plank.

TOLERANCE ON SHAPE AND POSITION

Warp Spring If plank's length °‹ 500 mm, °‹ 0.02% of plank's length is allowed; If > 500 mm, °‹ 0.03% is allowed
Cup Convex warping: °‹ 0.2% of plank's width; concave warping: °‹ 0.15% of plank's width
Bow °‹ 0.3% of plank's length
Gap °‹ 0.4 mm
Height difference between planks at joint °‹ 0.3 mm

OTHERS

Moisture content£ļ7% °‹ moisture content °‹ balance moisture level of locality
Varnish adherence force: Grade A: level 0-1; Grade B: level 2; Grade C: level 3

Nature (N) is a mixture of A and B grade
Rustic (R) is a mixture of C and D grade
D grade is any grade lower than C grade


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