The fire tests, conducted at an authorized independent facility, were done in accordance with ASTM E 119, the "Standard Test Method for Fire Tests of Building Construction and Materials." Each of the tested materials was used to construct a typical exterior house wall section, which was then subjected to fire for one hour or until one of the failure criteria was met. Failure takes place when the wall collapses, flame or hot gas penetrates the wall, or when the temperature rises to 250??F or greater on the unexposed (interior) side of the wall.The vinyl siding burned away, failing the test after only 18 minutes and exposing the underlying house structure to the flames. [sev.prnewswire.com]
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Vinyl siding melts at relatively low temperatures,
exposing what is underneath it to the possibility of
ignition.
[www.royalbuildingproducts.com]
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see article: Fire Properties of Vinyl Siding
[www.housingzone.com]
[www.housingzone.com]

Mike Carlson, CFI, CFEI, CVFI, CATI, CPP,
Chicago, Il