It is not technically incorrect to describe any timber sheathing board as being vapour permeable, but the question remains just

how vapour permeable the different boards are. Many factors such as thickness, board type, number of layers of adhesive,

timber type, adhesive used, moisture content and manufacturing homogeneity, all have an impact on the vapour permeability of

a given product or manufacturing batch. It is important to have this tested value as an input for the hygrothermal modeling that

is needed to prepare a Performance Solution.

This technical note presents key research from Freudenberg laboratories and field validations about the ProctorGeo HC8 and

ProctorGeo EnkaVent represents a breakthrough in roofing underlayment technology. It is a three-dimensional multi-use

mat, made of continuous nylon filaments fused at their intersections. The product can be used in metal and ballasted roofing

applications where spacing of the roof will provide the ventilation and drainage needed for a long service life.

We often asked to provide a vapour permeable sarking membrane that is non-combustible and vapour permeable. We are still not aware of such a product that exists in Australia.

Sarking products can be used in Type A or Type B wall constructions since NCC2019 not because they are “non-combustible” but because there is an exemption that permits their use wherever a non-combustible material is required. [NCC 2022 C2D10 or NCC 2019 C1.9]

Galvanic Corrosion is a process of when two different metals of equal surface area are combined in the presence of an electrolyte (a fluid that conducts electricity). Hydrogen is absorbed at the cathode and a current flows, thus the less noble metal migrates into the solution (the ‘anode’ is attacked).

One of the most common enquiries we get asked is how to effectively insulate a single skin masonry wall or how to rectify one that has moisture or sinister odours emerging from behind the plasterboard lining. Since NCC 2016 Amendment 1 clarified the requirement for all elements of type A and type B wall construction to be non-combustible, including the insulation, we are seeing more drawings of what we have dubbed the “WALL OF DEATH.”

When something sounds too good to be true, it usually is. Since the NCC 2016 Amendment 1 clarified the requirement for all elements of type A and type B wall construction, including the insulation, to be non-combustible, DCTech have been receiving many enquiries about our market leading vacuum insulated panels (VIP).

This technical note provides details of the Nvelope framing system, the Nvelope Thermal Gasket, its R-value and its relevance to the NCC 2019 Section J.

Changes in the Australian National Construction Code (NCC), 2019 with respect to Energy Efficiency (Section J), came into effect as of May 1st, 2020 after a transition period of one year. A more rigorous Section J lays out the requirements for the energy efficiency of new buildings and is the most significant change since Section J was introduced back in 2005.