9.12.1.1.(3)

Intent 1:

To limit the probability that organic material will decompose beneath foundations, which could lead to soil having an inadequate bearing capacity, which could lead to the undue subsidence of soil under footings, which could lead to the cracking of foundations or the deformation of building superstructures.

For environmental separators or elements supporting an environmental separator, this is to limit the probability of:

• condensation,
• precipitation ingress,
• the ingress of moisture from the ground, or
• compromised thermal performance of components intended to resist heat transfer.

This is to limit the probability of:

• an inadequate control of the temperature of interior spaces, drafts, relative humidity or water accumulation,
• the generation of pollutants from biological growth or from materials that become unstable on wetting, or
• compromised integrity of foundation walls that act as environmental separators or of elements supported by such walls, which could lead to the deterioration of building elements.

This is to limit the probability of:

• negative effects on the air quality of indoor spaces,
• the inadequate thermal comfort of persons, and
• contact with moisture.

This is to limit the probability of harm to persons.

Intent 2:

To limit the probability that organic material under buildings will harbour insects or vermin, or decompose and release gases, spores or other contaminants, which could lead to the generation of pollutants, which could lead to negative effects on the air quality of indoor spaces, which could lead to harm to persons.