What to Look for When Hiring a Waterproofer in NZ
- Specific membrane system named (Sika, Ardex, Mapei etc)
- Manufacturer's approved applicator status
- Primer and detailing spec in quote
- Flood test before tiling
- Building Code E2/E3 compliance certification
Red Flags to Watch Out For
- Won't name the membrane product
- No flood test offered
- No manufacturer warranty
- Experience only with residential (not your commercial job type)
Typical Costs Across NZ
Bathroom waterproofing: $800β$2,500. Deck membrane: $80β$180/mΒ². Roof membrane: $60β$130/mΒ²
Costs vary significantly by city β Auckland and Queenstown are typically the most expensive, while Invercargill and Dunedin are among the most affordable.
Licensing Requirements
No mandatory licensing. Must comply with NZ Building Code Clause E2 and E3. Check the register β