Fire Testing – Brick Vs. Vinyl & Fiber Cement

only materials to pass the test, achieving a one-hour fire-resistance rating for the wall. The vinyl siding burned away, failing the test after only 18 minutes and exposing the underlying house structure to the flames. Surprisingly, the fiber cement siding, which homeowners and builders often assume to be adequately fire-resistant because of its concrete-like composition, also failed the test and could not withstand the flames for a full hour. … Brick Fire Testing Vinyl Fiber Cement …