NU-THERM Cavity System

NU-THERM is a cavity-based exterior insulation and finishing system (EIFS) wall cladding. It is an external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

The system consists of expanded polystyrene (EPS) sheets fixed over polystyrene battens to form the cavity. The coating system consists of 8 mm thickness of fibreglass mesh reinforced polymer-modified cement-based plaster. The plaster finish can be textured to give either a sponge or adobe appearance. The plaster system is finished with an acrylic exterior coating system.

The system incorporates a primary and secondary means of weather resistance (first and second line of defence) against water penetration by separating the cladding from the external wall framing with a nominal 20 mm drained cavity.

NU-THERM has been appraised as an external wall cladding system for buildings within the following scope:

• The scope limitations of NZBC Acceptable Solution E2/AS1 paragraph 1.1.
• Constructed with timber framing complying with the NZBC.
• With a risk score of 0-20 calculated in accordance with NZBC Acceptable Solution E2/AS1 Table 2.
• Situated in NZS 3604 wind zones up to and including very high.

NU-THERM has also been appraised as an external wall cladding system for steel-framed buildings within the following scope:

• The scope limitations of NZBC Acceptable Solution E2/AS1 with regards to building height and floor plan area.
• Constructed with steel framing complying with the NZBC.
• With a risk score of 0-20 calculated in accordance with NZBC Acceptable Solution E2/AS1 Table 2.
• Situated in NZS 3604 wind zones up to and including very high.

NU-THERM must only be installed on vertical surfaces (except for tops of parapets, sills and balustrades, which must have a minimum 10° slope and be waterproofed in accordance with the technical literature).

The system is appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills. (The Appraisal of NU-THERM relies on the joinery meeting the requirements of NZS 4211 for the relevant wind zone.)

Installation of components and accessories supplied by Nu-Age Plaster Ltd and approved applicators must be carried out only by Nu-Age Plaster Ltd approved applicators.

NU-THERM Cladding Solution, version 5

Always refer to the Appraisal in full and the technical literature.