List of all the current air leakage testers in New Zealand accredited with ATTMA. Air leakage testing very tight buildings (as they all should be build tight and ventilate right is a thing after all) can be tricky and the right training makes it much easier. We recommend for your Passive House blower door test: Air leakage testing is done …
Oppose NASH as AS for E2 as it doesn’t cover external insulation

And putting batts between light steel framing is not a good option as discussed below. https://www.mbie.govt.nz/have-your-say/building-code-update-consultation-november-2019 The Oak Ridge National Laboratory has found that thermal bridging in a wood-framed wall lowers the effectiveness of cavity insulation by 10%, but performance drops a whopping 55% in a wall framed with steel. https://www.buildingscience.com/documents/insights/bsi-005-a-bridge-too-far “But from a hygrothermal standpoint, I can only add …
19 August 2019 BMJ Journals: Damp mouldy housing and early childhood hospital admissions for acute respiratory infection: a case control study
Damp mouldy housing and early childhood hospital admissions for acute respiratory infection: a case control study Bottom line for the Wellington Region alone 1710 hospitalizations per year for children under 2 years old would be prevented if all housing were free from damp and mould!! “This paper presents the largest ever case–control study of the association between housing quality and hospital …
19 August 2019 SunLive: Crank up the heat on someone’s winter
Yes sometimes even sick folks living in cold homes don’t realize how it impacts their health. “Two weeks ago, the temperature dropped to zero or one degrees inland where a woman with cancer was living. Her nights were a struggle, her breathing was laboured and each day she woke up exhausted. Healthy Homes chatted with her about the importance of …
15 August 2019 News Hub’s Mel Logan & Dan Satherley: Damp, mouldy homes blamed for high rate of kids with respiratory infections
1600 extra death per year 20% of serious respiratory infections prevented. Seems like warm dry healthy homes would cheaper than what we do now. Content by News Hub.
13 August 2019 Voxy: Energy company looks at health effects of cold homes
“The WHO report found that cold indoor temperatures have been associated with increased blood pressure, asthma symptoms and poor mental health. Cold homes contribute to increases in deaths and disease. It is estimated that in New Zealand 1600 additional people die each winter, with respiratory and cardiovascular disease highly prevalent in these alarming statistics. Elderly people, children and those with …
12 August 2019 Passive House Massachusetts legislates incentive path to PH
I’m originally from Massachusetts (it’s the state with Boston on the east coast of the USA) and have spent some time with the Passive House community there back in 2012 so it it good to see the changes they are shaping. To give those of us in NZ scale Massachusetts is about twice the population of NZ. Good news is …
24 July 2019 NZ Doctor: Bridging the gap with Healthy Homes
Not sure I’d consider Wellington or Rotorua any more damp than Christchurch or Auckland in the winter. Much of NZ is nearly 100% RH in the winter for at least part of the day – which is why ventilation AND heating is required for health. https://www.nzdoctor.co.nz/article/undoctored/bridging-gap-healthy-homes “It’s great to see the Ministries working on this,” says Letitia. “Our mission is …
NZ Building-related standards
“The Ministry of Business Innovation and Employment (Building System Performance) has funded the following building standards, used for Building Code compliance, for free download.” Awesome. This includes most of the performance standards for heating/ventilation etc. Located at: https://www.standards.govt.nz/sponsored-standards/building-standards/