ARDEX under tile liquid membranes have been appraised for use as waterproofing membranes for the internal wet areas of buildings, within the following scope:

• On floor substrates of concrete, flooring grade particleboard, plywood, compressed fibre cement sheet, and fibre cement sheet underlay, and on wall substrates on concrete, concrete masonry, wet area fibre cement sheet lining systems and wet area plasterboard lining systems;
• and when protected from physical damage by ceramic or stone tile finishes;
• and where floors are designed and constructed such that deflections do not exceed 1/360th of the span 

Do not use ARDEX WPM 155 Rapid under the following conditions:

• Areas subject to negative hydrostatic pressure or rising damp, unless treated with ARDEX WPM 300
• Wet substrates or green screeds/concrete – need to be sealed with one coat ARDEX WPM 300 as described earlier
• Surface temperatures below 10°C or greater than 35°C
• Do not expose to prolonged UV conditions

Other Limitations:

• Not suitable for permanent immersed conditions. For conditions of permanent immersion, it is recommended that ARDEX WPM 002 (Superflex Two Part) is used
• Must be installed by an approved ARDEX Applicator 

ARDEX WPM 155 Rapid, assuming use, install and maintenance stated within the ARDEX WPM 155 Rapid Datasheet, will meet the following provisions of the NZBC:

• Clause B2 Durability: Performance B2.3.1 (b) 15 years
• Clause E3 Internal Moisture: Performance E2.3.1 and E2.3.2
• Clause F2 Hazardous Building Materials: Performance F2.3.1

• Class III membrane — in accordance with AS4858 requirements
• Green Star — meets the benchmark for VOC credit in the Green Building Council of Australia’s Rating Tools
• BRANZ Appraisal (No 472)
• BRANZ Appraisal (No 473)