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ARDEX External Tiling System

ARDEX External Tiling System is suitable for external under-tile applications.

  • Waterproofing: ARDEX WPM 1000
  • Matting: ARDEX UD 150 + ARDEX UD 158
  • Tile Adhesive: ARDEX X 18
  • Tile Grout: BAL Micromax2
  • Waterproofing Adhesive ARDEX WA 98 

ARDEX WPM 1000 is a fleece-lined waterproofing sheet membrane specially formulated for the direct adhesion of tiled systems or for other non-exposed use. ARDEX WPM 1000 is heat-welded at laps and seams to create a superior bond, consistent gauge and allow a quick installation.

ARDEX UD 150 is an unbonded, passive capillary drainage system for use under an external tiled surface. Acting as a drainage channel underneath the tiled surface, ARDEX UD 150 speeds up the drying process after rainfall and helps reduce the build up of efflorescence.

BAL Micromax2 is a rapid-setting, highly flexible, water/frost-resistant cementitious tile grout with built-in Microban antimicrobial protection for walls and floors:

  • Sets in 2-3 hours (at 20°C): enables faster completion
  • Efflorescence-free formulation: minimises risk of patchy discolouration. Water/frost-resistant. Built-in admixture for increased flexibility and enhanced durability. Ensures clean, even finish for grout joints.
Key Features


  • Manufactured in New Zealand
  • BRANZ Appraised (No. 727)
  • Heat-welded laps and seams Fleece-lined for greater adhesion
  • Thin and consistent membrane thickness
  • Excellent flexibility — no requirement for fillet or bond breakers
  • Excellent resistance to tearing, cracking, bubbling, and absorption


  • ARDEX UD 150 has a 6mm drainage channel, with a total 9mm thickness of the matting
  • Isolates tiled covering from substrate movements and stresses
  • Allows passive drainage of moisture through and underneath the tiled surface
  • Diffusion slits enable ventilation of residual moisture from cementitious substrates
Tile Underlay
NZ Made
NZ Made
Scope of Use


  • Specifically designed to be used as an external waterproofing membrane for directly adhered tiled surfaces or for other non-exposed use
  • Suitable for use with most ARDEX tile adhesives in domestic and commercial locations over most common substrates
  • An approved waterproofing membrane for use under ARDEX undertile drainage systems such as ARDEX UD 150
Limitations on Use

The membranes must be installed by trained applicators, approved by ARDEX New Zealand Limited.

ARDEX WPM 1000 is not suitable as a trafficable surface nor as an exposed membrane. If ARDEX WPM 1000 is needed to be left exposed before tiling commences, ensure that care is taken to protect from general traffic and any source of damage

Statement of Building Code Compliance

ARDEX WPM 1000, assuming use, install and maintenance stated within the ARDEX WPM 1000 Datasheet, will meet the following provisions of the NZBC:

  • Clause B2 Durability: Performance B2.3.1 (b) 15 years.
  • Clause E2 External Moisture: Performance E2.3.1 and E2.3.2.
  • Clause F2 Hazardous Building Materials: Performance F2.3.1.
Other Performance Attributes
  • Fully compatible with ARDEX tiling systems
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
BAL Micromax2 - Technical Datasheet
Data Sheet: ARDEX UD 150
Material Safety Data Sheet
Product Info: ARDEX UD 150
Product Info: ARDEX UD 158
Product Info: ARDEX WA 98
Product Info: ARDEX WPM 1000
Product Info: ARDEX X 18
BRANZ Appraisal 473
Maintenance Instructions
Brochure: ARDEX WeldTec
Product Info: BAL Micromax2
ARDEX Company Profile

ARDEX New Zealand supply and manufacture a range of quality construction materials, including products for levelling floors; external and internal waterproofing; and fixing natural stone and tiles.

Product Enquiries

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