Shera Overlap Weatherboard Cavity Cladding
- Appraisal number 997 (2017)
- Valid from
- Information provider
- BRANZ Limited
- Information type
- BRANZ Appraisal
1. Shera Overlap Weatherboard Cavity Cladding 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.
2. Shera Overlap Weatherboard Cavity Cladding consists of Shera weatherboards, either bevelback or flat back fibre cement weatherboards which are fixed over timber battens to form a cavity. The cladding is finished with a latex paint system.
3. 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.
1. Shera Overlap Weatherboard Cavity Cladding have 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 NZS 3604 Wind Zones up to, and including, Extra High.
2. Shera Overlap Weatherboard Cavity Cladding must only be installed horizontally on vertical surfaces.
3. Shera Overlap Weatherboard Cavity Cladding have been appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills. (Note: The Appraisal of Shera Overlap Weatherboard Cavity Cladding relies on the joinery meeting the requirements of NZS 4211 for the relevant Wind Zone.)