Depending on the characteristics of a building, some measures may not be suitable for installation.

The purpose of the pre-installation inspection is to establish the extent of the work required and the appropriate measure of insulation.

The precise scope of the pre-installation inspection is dependent on the measure being installed. Common considerations are:

• Building construction
• Building condition/evidence of structural defects
• Building location
• Measures already installed that may interfere
• Evidence of water penetration
• Evidence of condensation