Description

Caviteclad Exterior Insulation and Finishing System (EIFS) is a cavity-based external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

The system consists of 50 mm (Caviteclad) sheets of either expanded polystyrene (EPS), thermoset phenolic foam, or extruded polystyrene (XPS) or 75 mm (Thermashell) EPS sheets fixed over polystyrene battens to form a cavity. The coating system consists of a 3-4 mm thickness of fibreglass mesh reinforced base coat plaster, followed by the application of 1-2 mm thick finishing plaster, which is then finished with an exterior paint system.

Scope

Timber Framing

1. Caviteclad has been appraised for use as an external wall cladding for timber-framed buildings within the following scope: 

• the scope limitations of NZBC Acceptable Solution E2/AS1; and, 
• with a risk score of 0–20, calculated in accordance with NZBC Acceptable Solution E2/AS1; and, 
• situated in Wind Zones up to, and including, Extra High determined in accordance with NZS 3604. 

Steel Framing 
 
2. Caviteclad has been appraised for use as an external wall cladding for steel-framed buildings within the following scope: 

• the scope limitations of NZBC Acceptable Solution E2/AS4 and NASH Building Envelope Solutions; and, 
• with a risk score of 0-20, calculated in accordance with NASH Building Envelope Solutions; and, 
• situated in Wind Zones up to, and including, Extra High determined in accordance with NZS 3604. 

Specific Design 
 
3. Caviteclad has also been appraised for weathertightness and structural wind loading when used as an external wall cladding system for buildings within the following scope: 

• the scope limitations of NZBC Acceptable Solution E2/AS1 for timber-framed buildings or NASH Building Envelope Solutions for steel-framed buildings; and, 
• constructed with framing subject to specific engineering design; and, 
• situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa determined in accordance with AS/NZS 1170.2

General

4. Caviteclad must only be installed vertically over horizontal cavity battens. In all instances, it must be installed on vertical, flat surfaces.

5. Caviteclad must only be used with window and doors that comply with NZBC Acceptable Solution E2/AS1 or that are covered by a valid BRANZ Appraisal or NZ CodeMark certification.