THERMORY PINE GRADING 2013 WWW.THERMORYUK.CO.UK

Thermory Pine – Visual Grading Rules for Natur Wood qualities / Defects Sound Knot Splay knot Edge knot and Arris knot Knot cluster Pin knot Black and Dead knot Broken knot Loose knot and Hole Rotten knot Bark ringed knot Resin pocket Heart wood and Heart Rot Log blue stain and Mould Insect holes Wane Top rupture Bark pocket and Scar Shake Cup and Twist Spring and Bow Hit & Miss Grading process Visual Grading Rules General characteristics Thermory Pine

Grading Process Grading is done over 3 stages: When kiln dried raw material arrives to factory After the boards are split, through cut etc just before the thermo treatment phase Final grading is after thermo-treatment and after profiling (planning). This is when the “face” of the board is choosen. Thermory Pine

Visual Grading Rules for Thermory Pine FACE Graded face - Smooth, without visible mechanical damage from tools. No Hit & Miss allowed Ungraded face - Cutting marks max 2mm width allowed  KNOTS Bark ringed knot - Allowed 5 knots within 2 metres. Maxium knot size is 20% of piece’s width Black & Dead fixed knots - Allowed, at face area maximum size 20% of piece’s width, at edges maximum size 50% of piece’s thickness Broken knot - Allowed when breakage is invisible after installation. Small cracks inside healthy knots are allowed Edge and Arris knot - Allowed in all sizes, when solid Knot cluster - Allowed, when knots’ within cluster are solid Loose knot and hole - Not allowed, if loose knot or hole is visible in usage Pin knots - Sound < 10mm are allowed Rotten knot - Not allowed Sound knot size - Solid sound knots allowed max. ½ of the width Splay knot - Sound knot rules apply to sound splay knots Impregnated Pine

Visual Grading Rules continued OTHER CHARACTERISTICS Bark pocket and Scar - 1 bark pocket and scar (L 120mm x W 20mm) within 2 metres. Must be solid on top. Heart wood and Heart - Allowed, heart is a natural quality for sawn heart wood pine Insect holes - Not allowed Mould - Not allowed Resin pocket - 3 resin pockets (W 10mm x L 50mm) allowed within 2 metres Rot / decay - Not allowed Shake / Surface crack - Shallow and short allowed. Through and ring shake not allowed. Continuous cracks not allowed. Maximum area of breakage is 50sqmm. Top rupture - Allowed, maximum 50% out of piece’s width Wane - Not allowed Cup - Allowed 2% of piece’s width within 2 metres Twist - Allowed 10% of piece’s width within 2 metres. Permitted as long as the board can easily be mounted Spring - Allowed 4 mm within 2 metres Bow - Allowed 15 mm within 2 metres  A maximum of 3% of pieces within a pack can be of a lower quality than Natur.   THE FOLLOWING PHOTOS ARE NOT ALL OF THERMORY PINE. Impregnated Pine

General knot types Sound knot Dead knot Barkringed knot Black knot Source: RT-kortti Sound knot Dead knot Barkringed knot Black knot Arris knot Splay knot Spike knot Knot cluster Thermory Pine

Sound knot Allowed to maximum of half the board width Thermory Pine

Splay knot Sound knot rules apply also to sound splay knots Thermory Pine

Edge and Arris knot Allowed in all sizes, when solid Edge knot Thermory Pine

Knot cluster & Scattered knots Allowed, when knot’s within cluster are solid Knot cluster Scattered knots Thermory Pine

Pin knot Pin knots = sound knots <10 mm are allowed Thermory Pine

Black and Dead knot Allowed, at face area maximum size 20 % of piece’s width, at edges maximum size 50 % of piece’s thickness. Black knot Dead knot Thermory Pine

Broken knot Allowed when breakage is invisible after installation. Small cracks inside healthy knots are allowed. Hole Thermory Pine

Loose knot and Hole Not allowed, if loose knot or hole is not invisible in usage! Impregnated Pine

Rotten knot Not allowed! Thermory Pine

Bark ringed knot Allowed 5 knots within 2 metres. Maximum knot size is 20 % of piece’s width. Thermory Pine

Resin pocket 3 resin pockets (width 10 mm x lenght 100 mm) allowed within 2 meters. Thermory Pine

Heart wood and Heart Allowed, heart is a natural quality for sawn heart wood pine Thermory Pine

Rot Not allowed! Thermory Pine

Log blue stain and Mould Not allowed! Log blue stain Mould Mould Mould Thermory Pine

Insect holes Not allowed! Thermory Pine

Wane Not allowed! Thermory Pine

Top rupture Allowed, maximum 50 % out of piece’s width Thermory Pine

Bark pocket and Scar 1 bark pocket and scar (L 120 mm x W 20 mm) within 2 meters. Must be solid on top. Scar Bark pocket Thermory Pine

Shake and Surface cracks Shallow and short allowed. Continuous cracks not allowed. Maximum area of breakage is 50sqmm. Through & ring shake not allowed! Impregnated Pine

Cup and Twist Cup: Allowed 2 % of piece’s width within 2 meters. Twist: Allowed 10 % of piece’s width within 2 meters, as long as board can be easily mounted. Twist Cup Thermory Pine

Spring and Bow Spring: Allowed 4 mm within 2 meters. Bow: Allowed 15 mm within 2 meters. Spring Bow Thermory Pine

Hit & Miss Not allowed! Thermory Pine