rockies
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# Posted: 3 Jun 2017 07:33pm
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Fire ratings for common species of wood and composite decking.
Ipe: 30 flame spread rating (results vary depending on test and type of exotic hardwood) Timbertech XLM: 30 flame spread rating (Class B) Azek: 40 flame spread rating Trex Transcends: 60 flame spread rating Timbertech Twin Finish: 70 flame spread rating Redwood: 70 flame spread rating Western Red Cedar: 70 flame spread rating Timbertech Earthwood Evolutions: 85 flame spread rating Evergrain composite: 90 flame spread rating Fiberon Tropics: 115 flame spread rating
The materials performance is assigned numeric value which gives it a rating of Class A (1-25), Class B (26-75), or Class C (76-200). A material rated as Class A would have a lower flame spread, and therefore a better performance rating, than a Class C material. Concrete, for example, carries a Class A rating.
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