9.30.2.1.(1)

Intent 1:

To limit the probability of excessive irregularities on the surface of the substrate on which the finished flooring is installed, which could lead to the displacement or cracking of finished flooring.

Where finished flooring is required to provide water resistance, this is to limit the probability of the ingress of water into the subfloor, which could lead to:

• the generation of pollutants from biological growth or from materials that become unstable on wetting, or
• the deterioration of the finished flooring and the subfloor.

This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.