Recently, I have received several inquiries regarding materials used to construct and/or coat a rooftop landing pad.
NFPA does not review or approve materials, products, or designs for compliance with our standards. However, NFPA 418 Standard for Heliports, 2011 Edition, requires the rooftop landing pad surface to "be constructed of approved noncombustible, nonporous materials." [5.4.1] Because the standard requires the materials to be approved, they should be reviewed and accepted by the authority having jurisdiction prior to use or application, in order to avoid costly changes. The noncombustibility of the material(s) and/or coating(s) should be appropriately substantiated by the manufacturer and/or helipad designer. The following criteria for determining noncombustibility has been accepted by the technical committee for the 2016 edition of NFPA 418:
- A material that, in the form in which it is used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors when subjected to fire or heat
- A material that is reported as passing ASTM E136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 Degrees C
- A material that is reported as complying with the pass/fail criteria of ASTM E136 when tested in accordance with the test method and procedure in ASTM E2652, Standard Test Method for Behavior of Materials in a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 Degrees C
The Second Draft of the 2016 edition is open for NITMAM until August 21, 2015.
If you have other questions on NFPA 418, please visit the “Technical Questions” tab at http://www.nfpa.org/418.
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