QUALITIES

BIRCH

QUALITY CLASS A

QUALITY CLASS A

Birch – finger jointed glulam board A
  • No defects
  • Single black knots (circular knot up to 3 mm) – permitted
  • No other defects permitted
QUALITY CLASS B

QUALITY CLASS B

Birch – finger jointed glulam board B
  • Whole knot – permitted without limit
  • Black knot up to 10 mm – permitted
  • Single random drywall patches – permitted
  • Single random red heartwood streaks – permitted
QUALITY CLASS C

QUALITY CLASS C

Birch – finger jointed glulam board C
  • Whole knot – permitted without limit
  • Black knot up to 20 mm – permitted
  • Drywall – permitted
  • Single random fissures with drywall cover – permitted
  • Heartwood – permitted without limit

PINE

QUALITY CLASS A

QUALITY CLASS A

Pine – knotty, finger-jointed or full stave_A
  • Fresh knots up to 30 mm – allowed
  • Black small knots up to 3 mm – allowed
  • Resin pockets not allowed
  • Pith and blue stain not allowed
QUALITY CLASS B

QUALITY CLASS B

Pine – knotty, finger-jointed or full stave_B
  • Fresh knots – allowed without limititations
  • Black knots up to 20 mm – allowed
  • Repairs with putty – allowed
  • Occasional pith stripes – allowed
  • Shakes and blue stain are not allowed
QUALITY CLASS C

QUALITY CLASS C

Pine – knotted finger jointed glulam with full lamination_C
  • Whole knot – permitted without limit
  • Whole knot up to 35 mm – permitted
  • Repairs – permitted without limit
  • Heartwood streaks and resin pockets – permitted (covered with drywall if necessary)
  • Slight blue stain – permitted (on agreement with client)
QUALITY CLASS A

QUALITY CLASS A

Pine – knot-free finger jointed glulam_A
  • No defects
QUALITY CLASS B

QUALITY CLASS B

Pine – knot-free finger jointed glulam_B
  • Occasional pith streaks – permitted
QUALITY CLASS A

QUALITY CLASS A

Pine (sideboard) – knot-free glulam