![]() ![]() ![]() If low-density fibrous insulation is installed with an air space on both sides of the insulation, the temperature differential between the warm and cold sides will drive convective airflow around the insulation. A-9.25.2.3.(3) Position of Insulation.įor thermal insulation to be effective, it must not be short-circuited by convective airflow through or around the material. Hence, these flame-spread rating requirements are excepted in referencing these standards. However, the Code cannot apply such requirements to some materials and not to others. These are included either because the industry producing the product wishes to demonstrate that their product does not constitute a fire hazard or because the product is regulated by authorities other than building authorities (e.g., "Hazardous Products Act"). Certain of the insulating material standards referenced in Sentence 9.25.2.2.(1) do include flame-spread rating criteria. Part 9 has no requirements for flame-spread ratings of insulation materials since these are seldom exposed in parts of buildings where fires are likely to start. A-9.25.2.2.(2) Flame-Spread Ratings of Insulating Materials. The number that introduces each Note corresponds to the applicable requirement in this Part. These Notes are included for explanatory purposes only and do not form part of the requirements. ![]()
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