5.6.1. Protection from Precipitation

5.6.1. Protection from Precipitation
5.6.1.1. Required Protection from Precipitation
(See Note A-5.6.1.1.)
  1. Except as provided in Sentence (2), where a building component or assembly is exposed to precipitation, the component or assembly shall
    1. minimize ingress of precipitation into the component or assembly, and
    2. prevent ingress of precipitation into interior space.
  2. Protection from ingress of precipitation is not required where it can be shown that such ingress will not adversely affect any of
    1. the health or safety of building users,
    2. the intended use of the building, or
    3. the operation of building services.
5.6.1.2. Installation of Protective Materials
  1. Where protective materials are applied to assemblies to provide the required protection from precipitation, they shall be installed so as to shed precipitation or otherwise minimize its entry into the assembly and prevent its penetration through the assembly.
    (See Note A-5.6.1.2.(1).)
    (See also Clause 5.3.1.2.(1)(d).)
  2. Where protective materials applied to assemblies to provide the required protection from precipitation are part of a vegetated roofing system, they shall be resistant to root and rhizome penetration when tested in accordance with ANSI/GRHC/SPRI VR-1, "Investigating Resistance to Root Penetration on Vegetative Roofs."
    (See Note A-5.6.1.2.(2).)

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