W1200 - REVERSE BRICK VENEER (With external lightweight cladding)
Structure and installation
ICANZ system reference for walls W1200 -8mm Fibre Cement Sheet external cladding fixed directly to stud.
- a) Breather Foil to outside of stud frame, bright foil facing stud cavity.
- 90mm non vented stud frame cavity or cavity filled with bulk insulation.
- b) Reflective foil positioned against inside edge of stud frame, bright foil facing brick work cavity.
- 40mm non vented brick cavity.
- 110mm bricks.
- 10mm plasterboard external lining.
NOTE: Total R-Values can be increased by substituting bulk insulation products of higher Material R-Value.
A. Calculations assumptions in accordance with AS/NZS 4859.1:2002. Amendment 1. 2006. Amendment 1. 2006 on the path of the insulation, as required by the BCA Vol 1. Part J and Vol 2. Section 3.12.
B. Temperatures and parameters are based on Australian climate assumptions. Air temperature difference 12oC (36oC less 24oC) for summer conditions and 6oC difference (18oC less 12oC) for winter.
C. Thermal resistance of air films and attic spaces based on values obtained from Section K5 and K6 of AS 4859.1:2006.
D. Building material elements based on 2000 AIRAH Handbook and attic thermal value based on AS4859.1 app K6 table K2.
E. Where reflective insulation is installed, a simple addition of R-values is not possible. Care must be taken to ensure the performance of reflective air spaces is not “double-counted”.
F. The emittance of the reflective surfaces are dependent on tested values and the conditions of the installation, as specified by AS/NZS 4859.1. Amendment 1. 2006.
