W0800 - HOLLOW CONCRETE BLOCK
Structure and installation
ICANZ system reference for walls W0800 -190mm Hollow Concrete Blockwork, internally lined with reflective insulation adjacent to a 35mm cavity provided by a 35mm batten (or 28mm cavity for 7.5mm Bubble foil) or 25mm batten with 10mm Reflective EPS board.
- Reflective foil positioned against blockwork. Bright side of foil facing stud cavity.
- Non vented airspace or Bulk insulation installed in cavity.
- 10mm plasterboard 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.
