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

Kempas/Merbau/Walnut  
Defects Top Face Back Face
Grade AB Grade C
Live knot [G] 2 allowed, diameter + 2 mm Not allowed Not restricted in size or number
Dead knot [G] Not allowed 2allowed, diameter + 5 mm Not restricted as long as diameter + 20 mm
Wormholes [G] Not allowed Few allowed (mending with putty) Not restricted as long as diameter + 15 mm
Brown line [G] Not allowed Not allowed Not allowed
Sapwood [G] Not allowed Length 1 mm Not allowed
Rot [G] Not allowed Initial rot Area of initial rot + 20%
Wane [G] + 0.5 mm + 1 mm Length + 30% of plank's length; Width + 20% of plank's width
Indentation Not allowed Slight Not allowed
Brightness mark Slight Allowed Not allowed
Roller marks Slight Allowed Not allowed
Crack [G] Not allowed Closed crack, 1〜30 mm (mending with putty) Not restricted in number, width + 0.5 mm; length + 50 mm
Cut and chatter mark [G] Not allowed Not distinct Not allowed
Scratches on varnish Slight Slight Not allowed
Blister [G] Not allowed Not allowed Not allowed
Wrinkling [G] Not allowed < 5% of plank's area Not allowed
Surface of varnish Fully sealed Not to affect maintenance Not allowed
Exposed undercoat [G] Not allowed Not allowed Not allowed
Pin holes 3 allowed, diameter + 0.5 mm 3 allowed, diameter + 0.5 mm Not allowed
Nib [G] 4 allowed, length + 500 mm;8 allowed, length > 500 mm 4 allowed, length + 500 mm;8 allowed, length > 500 mm Not allowed

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: 7% + 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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