Modern housing retrofit: assessment of upgrade packages to EnerPHit standard for 1940–1960 state houses in Auckland

Leardini, Paola and Manfredini, Manfredo (2015) Modern housing retrofit: assessment of upgrade packages to EnerPHit standard for 1940–1960 state houses in Auckland. Buildings, 5 1: 229-251. doi:10.3390/buildings5010229

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Author Leardini, Paola
Manfredini, Manfredo
Title Modern housing retrofit: assessment of upgrade packages to EnerPHit standard for 1940–1960 state houses in Auckland
Journal name Buildings
ISSN 2075-5309
Publication date 2015-03-11
Sub-type Article (original research)
DOI 10.3390/buildings5010229
Open Access Status DOI
Volume 5
Issue 1
Start page 229
End page 251
Total pages 23
Place of publication Basel, Switzerland
Publisher M D P I AG
Language eng
Abstract New Zealand state housing includes a significant portion of problematic buildings constructed after the public housing scheme launched in 1936. Most of these houses are still uninsulated, thus, cold, draughty, mouldy, and progressively decaying; however, as they are fundamental elements of the country’s culture, society, and environment, and are built with good quality materials and sound construction, they are suitable candidates for effective energy upgrades. This paper presents findings of a study on problems and opportunities of retrofitting the state houses built between 1940 and 1960 in the Auckland region. It advocates strategic national policies and initiatives for retrofitting, based on more challenging performance thresholds. The research defines and virtually implements an incremental intervention strategy including different retrofit packages for a typical 1950s stand-alone house. Indoor and outdoor environmental parameters were monitored over a year, and data used to establish a base case for thermal simulation. The upgrade packages were then modelled to assess their impact on the house’s thermal performance, comparing heating requirements and comfort of various insulation and ventilation options. The paper reports on effective ways of preserving the integrity of such a house, while improving its thermal performance to the EnerPHit standard, and discusses the benefits of introducing this holistic approach into New Zealand retrofit practice.
Keyword New Zealand state house
Energy retrofit
EnerPHit
Passive House Planning Package
Stand-alone house
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Special Issue on Selected Papers from Building A Better New Zealand (BBNZ 2014) Conference, Buildings 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Architecture Publications
 
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Created: Tue, 24 May 2016, 20:07:23 EST by Paola Leardini on behalf of School of Architecture