All work carried out, meets or exceeds the performance requirements as outlined by the Building Code of Australia, excerpts extracted from HIA form NAT BCA 10-06 below. Note: Not all details have been included, and further details are available online.

1. The minimum performance requirements that must be met to comply with the regulations are contained in the Building Code of Australia (BCA) Volume Two.
2. Acceptable construction manual (ACM) AS 3740 – Waterproofing of Wet Areas within Residential Buildings.
3. Wet Areas: An area within a building supplied with water from a water supply system. This includes: bathrooms, showers, laundries and sanitary compartments. It excludes kitchens, bar areas, kitchenettes or domestic food and beverage preparation areas.
4. Waterproofing system: means a combination of elements that are required to achieve a waterproof barrier, including, substrate, membrane, bond breakers, sealants, finishes and the like. The following are materials which are deemed to be waterproof:
   • Stainless steel
   • Copper – material not less than 99.9% copper
   • Waterproof flexible sheet flooring material with sealed joints
   • Membranes meeting the requirements of AS/NZS 4858
5. Requirements for waterproofing a wet area

Enclosed shower with a hob

• The entire floor of the enclosed shower area including the hob must be waterproofed.
• The walls must be waterproof to not less than 150 mm above the shower floor substrate or not less than 25 mm above the maximum retained water level whichever is the greater with the remainder being water resistant to a height of not less than 1800 mm above the finished floor level.
• Internal and external corners and horizontal joints must be waterproof within a height of 1800 mm above the floor level with not less than 40 mm width either side of the junction.

Unenclosed shower area

• The entire unenclosed shower area must be waterproofed.
• Walls and joints must be waterproofed similar to the requirements of an enclosed shower area.

Inserted baths

• No need to do anything to floor or the wall under the bath
• Waterproof the entire shelf area, incorporating the waterstop under the bath lip and project not less than 5mm above the tile surface.
• The wall needs to be waterproofed to not less than 150mm above the lip of the bath.
• Waterproof all tap and spout penetrations