Pacbld Siding Cavity System
- Appraisal number 997
- Valid from
- Information provider
- BRANZ Limited
- Information type
- BRANZ Appraisal
The Pacbld Siding Cavity System is a cavity based fibre cement weatherboard wall cladding. It is designed to be used as an external cladding system for residential and light commercial type buildings where domestic construction techniques are used.
The Pacbld Siding Cavity System consists of Pacbld Siding weatherboard, which is a bevelbacked fibre cement weatherboard, fixed over timber battens to form a cavity. The cladding is finished with a latex paint system.
The cavity 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 cavity. The cavity allows for any occasional ingress of water that may get past the external skin to drain to the exterior of the building, and any remaining moisture to dry by evaporation.
The Pacbld Siding Cavity System has been appraised as an external wall cladding for buildings within the following scope:
- The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
- With a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2; and,
- Situated in NZS3604 Wind Zones up to and including Extra high.
Pacbld Siding weatherboard must only be installed horizontally on vertical surfaces.
The Pacbld Siding Cavity 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 Pacbld Siding Cavity System relies on the joinery meeting the requirements of NZS 4211 for the relevant Wind Zone.)