Building materials, components and assemblies, and interfaces between components and assemblies:

• exposed to exterior space or the ground, including those separating interior space from exterior space or separating interior space from the ground, or
• separating environmentally dissimilar interior spaces.

Site materials, components, assemblies and grading that may affect environmental loads on building materials, components and assemblies exposed to exterior space or the ground.

This applies to buildings to which Part 5 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 5].

This also applies to cladding assemblies installed on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] where:

• the cladding assembly is not addressed in Section 9.27., or
• the cladding assembly does not comply with the prescriptive requirements of Section 9.27.

This also applies to the position of low air and vapour permeance materials within the building assembly relative to the position of materials providing thermal resistance in the assemblies of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where the building assembly:

• incorporates low permeance materials that act as other than cladding or that are installed on the warm side of the assembly, and
• is more susceptible to condensation [see Sentences 9.25.1.2.(4) and (5) for combinations of interior and exterior environmental conditions that create a higher risk for condensation].

This also applies to the design of vapour barriers in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where the building assembly is more susceptible to condensation [see Sentences 9.25.4.2.(2) and 9.25.4.2.(3) for combinations of interior and exterior environmental conditions that create a higher risk for condensation].

To state the application of Part 5.