Pitched Tiled Roof with Flat Ceiling

ICANZ System Reference R0100

Structure

Concrete or Terracotta tiled roof at 22.5o pitch, 40mm battens, reflective foil insulation, reflective attic space, 10mm plasterboard flat ceiling.

Insulation installation

Reflective insulation shall be draped under 40mm battens, antiglare side facing outwards. When used as sarking, reflective insulation, foil shall have 150mm overlap in accordance with AS/NZ4200.2.

Reflective insulation shall be draped under 40mm battens, antiglare side facing outwards. When used as sarking, reflective insulation, foil shall have 150mm overlap in accordance with AS/NZ4200.2.

To maintain effectiveness as insulation or sarking, any tears or gaps shall be repaired with a suitable reflective foil tape.

R3.5 batts positioned between joists on ceiling lining.

NOTE: Total R-Values can be increased by substituting bulk insulation products of higher Material R-Value.

A. In accordance with AS/NZS 4859.1:2002.  Amendment 1. 2006.
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.