Stramit Building Products has produced a free brochure demonstrating how building designers can achieve 6-star energy efficiency in residential buildings using deemed-to-satisfy requirements with Stramit metal roofing products.
The information in the brochure applies to pitched roofs with an unventilated roof space, where 6-star energy efficiency can be achieved, according to Stramit, by following three steps.
Step 1: Determine your climate zone. The BCA deemed-to-satisfy energy efficiency provisions are based on eight different climate zones, with varying requirements depending on the climate characteristics of each zone.
Refer to the map in the Stramit brochure or visit the Australian Building Codes Board website and search for Energy Efficiency Climate Zone Maps.
Step 2: Select steel roofing in an energy efficient colour. Lighter colours are more energy-efficient than darker colours because they absorb less heat from the sun.
A table in the brochure shows the full colour range of Colorbond coated steel products with Thermatech solar reflectance technology. The corresponding solar absorptance values are listed in order of performance.
Step 3: Select appropriate insulation. For pitched metal roofing, Stramit recommends that Permastop insulation blanket with Sisalation foil facing be installed directly beneath the roof sheeting and Pink Batts glasswool insulation laid on top of the ceiling.
The brochure includes a table of recommended combinations of roof blanket and ceiling batts to achieve the deemed-to-satisfy minimum total R-value roof requirement for 6-Star energy efficiency.
Contact a Stramit Building Products branch for a copy of the brochure “Energy-Efficient Roofing Solutions for 6-Star Residential Buildings.”
