Australian Standard AS 3740 – Waterproofing of Wet Areas within Residential Buildings defines a wet area as ‘an area within a building supplied with water from a water supply system and includes bathrooms, showers, laundries and sanitary compartments.’

Waterproofing of wet areas may be achieved by systems using water resistant plasterboards such as WaterShield or MultiShield or SafeShield.

This section contains:

• Wall systems incorporating WaterShield or SafeShield. For MultiShield systems, refer to section 4.1.1 and 4.1.2 as MultiShield has resistance to both water and fire.
• Installation instructions for wet area walls. For installation on WaterShield ceilings, refer to section 4.4.
• Waterproofing treatment methods for WaterShield, SafeShield and MultiShield walls
• Construction details for wet areas

Some elements of wet area installation will be carried out by a plasterer and other elements will be completed by trades such as plumbers and tilers. All waterproofing must be carried out by an approved applicator. Refer to section 3.3 for more information on wet areas.

Knauf guarantees the performance of WaterShield for 10 years. For more information, click here.