AS 3740 2021 Waterproofing Of Domestic Wet Areas

**AS 3740:2021** is an Australian Standard that provides guidelines and requirements for the **waterproofing of domestic wet areas**, ensuring these areas are designed and constructed to prevent water ingress and related structural damage.

### **Purpose:**
The standard aims to ensure that wet areas, such as bathrooms, laundries, and kitchens, are properly waterproofed to prevent water leakage, protect building structures, and maintain hygiene and durability.

### **Key Features:**
1. **Design Requirements**: Specifies minimum waterproofing requirements for different wet areas, including floors, walls, and penetrations (e.g., pipe openings).
2. **Materials**: Details the types of materials that are suitable for waterproofing and their performance characteristics.
3. **Installation Practices**: Provides guidelines for the correct application of waterproofing membranes and other systems to ensure durability and effectiveness.
4. **Testing and Quality Control**: Includes recommendations for testing waterproofing systems for compliance with the standard.
5. **Compliance with Building Codes**: Aligns with the **National Construction Code (NCC)** and ensures installations meet regulatory requirements.

### **Applications:**
- Bathrooms (showers, tubs, basins).
- Kitchens (near sinks and splash zones).
- Laundries (around washing machines and tubs).
- Any domestic area exposed to water use or splashing.

**AS 3740:2021** is an essential resource for builders, contractors, architects, and designers to ensure wet areas are adequately protected against water damage, promoting safety and structural integrity in residential buildings.