The KOROK® EX1 External Wall System
- Appraisal number 722
- 1 March 2018
- Valid from
- Information provider
- BRANZ Limited
- Information type
- BRANZ Appraisal
The KOROK® EX1 External Wall System incorporates KOROK® panels that are used to construct single skin, non-loadbearing, standard, fire and acoustically rated external walls.
KOROK® panels are made from lightweight aerated concrete encased in profiled galvanised sheet steel or factory applied paint coated sheet steel formwork.
The KOROK® EX1 External Wall System has been appraised for use as single skin, non-loadbearing, standard, fire and acoustically rated external walls for all buildings of importance levels 1 to 5 as defined by AS/NZS 1170, except that housing and communal residential buildings are excluded.
The KOROK® EX1 External Wall System has been appraised for vertical, straight in-fill panel walls with no penetrations.
When used with the KOROK® EX1 External Wall System the KOROK® panels are installed in a vertical orientation. The maximum span for the panels between structural supports is 8 m. The overall height or length of a KOROK® System wall will be determined by the structural support. When used as part of a fire rated system, the maximum span of the KOROK® panels is 4 m. Greater spans are subject to specific engineering design and/or fire engineering assessment and are outside the scope of this Appraisal.
The KOROK® EX1 External Wall System is not suitable for use in NZS 3604:2011 Exposure Zone D or near Geothermal Hotspots.