Siberian Larch
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Durability - Class 3/4, moderately durable
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Moisture - Small
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Density (mean.Kg/m3) - 550
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Texture - Fine
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Price - Low
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Colour(s) - Beige to Pale Yellow
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Working Qualities - Medium
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Fasterners* - Use stainless steel or galvanised nails
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Spread of Flame Rating# - Class D
Western Red Cedar
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Durability - Class 2, durable
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Moisture - Small
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Density (mean.Kg/m3) - 390
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Texture - Coarse
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Price - High
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Colour(s) - Pale Yellow to Reddish Brown
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Working Qualities - Excellent
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Fasterners* - Use stainless steel or galvanised nails
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Spread of Flame Rating# - Class D
Thermowood
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Durability - Class 2, durable
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Moisture - Small
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Density (mean.Kg/m3) - 490
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Texture - Fine
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Price - Low
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Colour(s) - Dark Brown
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Working Qualities - Good
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Fasterners* - Use stainless steel or galvanised nails
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Spread of Flame Rating# - Class D
Accoya
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Durability - Class 1, very durable
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Moisture - Very small
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Density (mean.Kg/m3) - 510
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Texture - Fine
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Price - High
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Colour(s) - Beige to Pale Yellow
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Working Qualities - Good
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Fasterners* - Use stainless steel
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Spread of Flame Rating# - Not tested to Euroclass standards, but equivalent to other softwood in ASTME84 spread of flame
* : Source - TRADA External Timber Brochure
# : Spread of Flame Rating will vary depending on treatment applied