| 5.6.2. |
Sealing, Drainage, Accumulation and Disposal |
| 5.6.2.1. |
Sealing and Drainage
(See Note A-5.6.2.1.)
- Except as provided in Sentence (2), materials, components, assemblies, joints in materials, junctions between components and junctions between assemblies exposed to precipitation shall be
- sealed to prevent ingress of precipitation, or
- drained to direct precipitation to the exterior.
- Sealing or drainage are not required where it can be shown that the omission of sealing and drainage will not adversely affect any of
- the health or safety of building users,
- the intended use of the building, or
- the operation of building services.
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| 5.6.2.2. |
Accumulation and Disposal
- Where water, snow or ice can accumulate on a building, provision shall be made to minimize the likelihood of hazardous conditions arising from such accumulation.
- Where precipitation can accumulate on sloped or horizontal assemblies, provision shall be made for drainage conforming with the relevant provincial or territorial regulations or municipal bylaws or, in the absence of such regulations or bylaws, with Article 2.4.10.4. of Division B of the NPC.
- Where downspouts are provided and are not connected to a sewer, provisions shall be made to
- divert the water from the building, and
- prevent soil erosion.
- Junctions between vertical assemblies, and sloped or horizontal assemblies, shall be designed and constructed to minimize the flow of water from the sloped or horizontal assembly onto the vertical assembly.
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