Category: Construction

Above Sheathing Ventilation – Part 0: Flat Roofs

Download Article     What’s a Ventilated Flat Roof? It is a low-pitched roof (≤10º) with an additional ventilated cavity space below the roof cladding. According to our European colleagues, it provides the opportunity to implement a diffusion open/permeable layer on the outer side of…

Above Sheathing Ventilation – Part 2: The Blue Planet

Download Article     Earth is just a pale blue dot in the context of our solar system. It’s a pretty wet world, 70% is covered in water. Our planet’s blue colour is the result of all this water reflecting blue wavelengths of light from…

Above Sheathing Ventilation – Part 1: Rise of the Cavity

Download Article   The Origin Story Every superhero needs one. If Above Sheathing Ventilation (ASV) is the superhero of roofs that work, then how and why did ASV come into being? We have a problem with the way we’ve been doing roofs in Australia and…

This is Australia

Mark ‘Cal’ Callaghan recalled that it started as a poem in his notebook, reflecting on the time that his family moved from England to Bundaberg in Queensland, a major culture shock for him. “To lie in sweat, on familiar sheets, In brick veneer on financed…

Is Non-Combustibility Good for your Health?

In the wake of Grenfell tower disaster in London, an out of cycle amendment was made to the building code to increase fire safety of façade systems. A new provision was included in March 2018 to combine a series of requirements and concessions for non-combustible…

Achieving Airtightness

Often when you see a job well done, you want to point to it as an example. At the Green Building Council of Australia’s recent workshop Tackling Air Tightness, there were several examples of projects that we could point to and say, “this is how…

High R-Value Structures

With increasing demand for high performance housing in Australia people are seeking R-values that exceed the limit to which a 90mm stud cavity can facilitate (maximum R2.5 – R2.7 glasswool). The increasing uptake of passive house and/or utilisation of passive house concepts is driving people…

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