Darrell Saby says:
Why were each of the tests done without a wall finish, such as gypsum board? The addition of gypsum board might change the temperature of the material behind it and, because the temperature within the room may rise faster, it may also cause flashover to occur faster.
CIMA Admin says:
Great question! The tests were performed by an accredited laboratory exactly as specified by the NFPA 286 test method. The purpose was to demonstrate the fire performance of the insulation materials. The expectation was that the spray-applied materials would all “pass” while batts would “fail.” That proved to be correct. Gypsum board would almost certainly change the test results, but this was a test of the insulation materials themselves, not gypsum board.
Thanks for your interest in cellulose insulation.
Brad Williams says:
What is the purpose to demonstrate fire performance of the insulation materials when no one would ever use the insulation in the same way the test was conducted? Having said that, the results are misleading.
CIMA Admin says:
First, keep in mind this is demonstration only and was conducted in a controlled environment not intended to directly replicate an actual "live" building. It was conducted by the well respected Oak Ridge National Laboratory. The test was suggested as a way to objectively assess the relative fire performance of insulation materials in and of themselves exclusive of any protective assembly component, such as gypsum board. Obviously, home insulation should never be left exposed as an interior finish. The corner test results do demonstrate the performance of the insulation products when exposed to flame. It also provides insight into why cellulose-insulated walls virtually always exhibit high fire resistance in actual home and building fires.
Video Comparing Cellulose And Fiberglass Insulation In A Fire | Greenest Insulation Blog says:
[…] Big Burn” by its producers, the video is not a true scientific controlled study like the burn test videos sponsored by CIMA. However, it does a good job of demonstrating how different cellulose […]