Appraisal No. 774 (2012)

Appraisal Holder:
Warmup New Zealand Ltd

Phone: 09 820 4001

Warmup Wetroom System

Appraisal Number: 774 (2012)


The Warmup Wetroom System is a wet area system for internal wet areas of building under ceramics or stone tiles.


Warmup Wetroom System has been appraised for use within the following scope:

In internal wet areas of buildings, within the following scope:

  • on substrates of Warmup Insulation Backer Board or fibre cement tile underlay supported by floor substrates of concrete, plywood, compressed fibre cement sheet; and,
  • when protected from physical damage by a screed and ceramic or stone tiles; and,
  • where floors are designed and constructed such that deflections do not exceed 1/360th of the span; and,
  • movement and control joints in the substrate must be carried through to the screed, tile or stone finish; and,
  • the design and construction of the movement and control joints is specific to the building and therefore the responsibility of the building designer and building contractor and is therefore outside this scope; and,
  • tiling or stone finishes are outside the scope of this appraisal; and,
  • with Ardex Undertile Sheet Membrane (WPM750) used as the waterproofing system; and,
  • where floors are designed not to exceed a continuous operating temperature of 35ºC; and,
  • the system must be installed using detailing as set out in the Technical Literature; and,
  • the Warmup Wetroom System must be installed by trained applicators, approved by Warmup New Zealand Ltd.

Building Code Compliance

In the opinion of BRANZ, Warmup Wetroom System if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal No. 774 (2012), will meet the following provisions of the NZBC:

Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years for substrates to wet areas. Warmup Wetroom System meets these requirements.

Clause E3 INTERNAL MOISTURE: Performance E3.3.4, E3.3.5 and E3.3.6. Warmup Wetroom System meets these requirements.

Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Warmup Wetroom System meets this requirement and will not present a health hazard to people.

The Warmup Wetroom System has been appraised as an Alternative Solution in terms of New Zealand Building Code compliance.

Other Conditions or Limitations

No special conditions or limitations. Refer to the Appraisal for general requirements.

Technical Literature

Install spec July 2012.

For a copy of the Technical Literature please contact Warmup New Zealand Ltd or click on the link to the left.

Do not base consent applications on an Appraisal Summary. Always refer to the full documentation, BRANZ Appraisal No. 774 (2012) Warmup Wetroom System.  Follow the link to the left to view the Appraisal.