Reports and presentations - Papakowhai Renovation project

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Read more of our early research into sustainable renovation at:

Read reports from HomeSmart Renovations, the project which followed on from this work:



  • 01-Jul-2013 (Publication Case study/16)

    Improved Heating in Papakowhai Renovations (PDF 152KB)

    Covers how more efficient heating combined with full insulation led to healthier indoor temperatures and energy savings in Papakowhai Renovation case studies.

  • 01-Jul-2013 (Publication Case study/15)

    Warmth and Energy Savings in Papakowhai Renovations (PDF 244KB)

    Covers how full insulation retrofit and efficient heating improved temperature and energy saving in Papakowhai Renovation case studies.

  • 01-Jul-2013 (Publication Case study/14)

    Downlights in Papakowhai homes (PDF 40KB)

    Calculates the heat loss from downlights in Papakowhai Renovation case study homes.

  • 01-Jul-2013 (Publication Case study/13)

    Achieving Good Solar Water Heater Performance (PDF 234KB)

    Three Beacon demonstration homes used and monitored solar water heating with mixed success.  This case study explains what worked and what didn't.

  • 30-Apr-2010 (Conference paper TE106/21)

    Sustainable Renovations of 1970s New Zealand Homes (PDF 801KB)

    John Burgess, Nikki Buckett, Michael Camilleri, Lisa Burrough, Andrew Pollard, Phil Hancock

    SB10 New Zealand

  • 30-Apr-2010 (Conference paper TE106/20)

    Papakowhai Retrofit Project: Improving the Thermal Envelope and Space Heating (PDF 634KB)

    John Burgess, Nikki Buckett, Michael Camilleri, Lisa Burrough, Andrew Pollard

    SB10 New Zealand

  • 28-Feb-2010 (Report HR2420/12)

    Clawback of heating services in Beacon research homes (PDF 523KB)

    Andrew Pollard, Nikki Buckett

    Increased energy efficiency of hot water and space heating should reduce the cost of providing these services. However, the phenomenon of 'clawback' - where occupants use the improved heating system to increase comfort, can alter the effect of energy efficiency upgrades. In this work, the data from the Papakowhai Renovation Project, and the Waitakere NOW Home® are used to assess the clawback from the water heating and space heating services in ten New Zealand homes. 

  • 30-Jun-2009 (Report HR2420/8)

    Solar Water Heating in the Waitakere and Rotorua NOW Homes and in three Papakowhai Renovation homes (PDF 1.3MB)

    Andrew Pollard

    This report describes and examines the performance of the solar water heating systems used in the Waitakere NOW Home®, the Rotorua NOW Home® and three of the Papakowhai Renovation houses. A variety of systems were used in these houses and performance varied from 75% of the water heating being provided by solar in one of the Papakowhai  Renovation houses to 36% of the water heating needs being met by solar in the Rotorua NOW Home®.  Reasons for the performance levels are suggested. 

  • 31-May-2009 (Report TE106/18)

    Papakowhai Renovations: Project Summary and Case Studies (PDF 1.3MB)

    Lois Easton

    The Papakowhai Renovation project renovated nine homes with a range of sustainable interventions and monitored them to see the effects of the retrofits on dwelling performance.  During the course of the project, nine reports on different aspects of the project were prepared.  This report summarises these reports and presents the overall findings, with a case study for each house.

  • 31-Mar-2009 (Report TE106/19)

    Cost Benefits of Sustainable Housing Retrofits (PDF 574KB)

    Ian Page

    This report considers the cost benefits of a variety of sustainable energy and water retrofits for existing houses.   Values are calculated for the four main centres and 11 house/ multiunit typologies, including health and comfort benefits,  initial costs of the measures and their replacements.  Future operating costs are discounted and the results are expressed as net present values and benefit cost ratios.  Typologies and locations are scaled up to derive national benefits.  A spreadsheet model is provided on which users can change parameters and try various packages of measures.

  • 31-Mar-2009 (Report TE106/17)

    Papakowhai Renovations: Householder Experiences and Perceptions (PDF 268KB)

    Rachael Trotman

    This report presents the findings of post project interviews  with three of the nine households involved in the Papakowhai Renovation project.  Positive reported impacts of the renovations included physical and mental health benefits, increased warmth, cost savings and greater energy efficiency.  Less positive aspects were some poor workmanship, the need for stronger project management and quality control of the renovations and better communication with householders.  

  • 30-Jan-2009 (Report TE106/15)

    Final Performance Monitoring from the Papakowhai Renovation Project (PDF 1.3MB)

    John Burgess, Nikki Buckett, Michael Camilleri, Lisa French, Andrew Pollard, Phil Hancock

    The Papakowhai Renovation project has monitored indoor environment, waste, water and energy in nine homes in Papakowhai, Porirua, before and after renovation. Three years' monitored data showed that all homes had improved in energy use and/or space temperatures and captured the effect of 'takeback'. Most renovations were not sufficient to lift the homes to the HSS High Standard of Sustainability®, and occupant choice and behaviour affected the outcomes.

  • 03-Nov-2008 (Report TE106/12)

    Papakowhai Renovations: Summary of interim reporting to inform HomeSmart Renovations (PDF 106KB)

    Lois Easton

    This working paper summarises the interim findings from the Papakowhai Renovation Project and considers the implications of those findings for HomeSmart Renovations.

  • 20-Sep-2008 (Conference paper NO102/9)

    NOW Homes and NOW Home (Papakowhai) Renovations: Transforming New Zealand's Housing Stock (PDF 211KB)

    Lois Easton, Andrew Pollard, Roman Jaques

    Discusses Waitakere and Rotorua NOW Homes, and the Papakowhai Renovation project.  SB08 World Sustainable Building Conference

  • 05-Jan-2008 (Report TE106/13)

    Interim Performance Monitoring from the Papakowhai Renovation Project (PDF 867KB)

    John Burgess, Nikki Buckett

    Nine houses in Papakowhai, Porirua, were monitored before and after renovation packages were applied to the houses. This reports early results of interim post-renovation data (5 months over winter). The final monitoring report is more accurate - see TE106/15.

  • 01-Jan-2008 (Report TE106/9)

    Papakowhai Renovations: Impacts on householders and dwelling performance (PDF 318KB)

    Kay Saville Smith

    Interprets the performance data from the Papakowhai renovations in light of householder interviews. Found that householders feel even small changes in indoor comfort ; householders do change their behaviours, especially through solar hot water heating. Consequently, physical monitoring data in itself is not enough to evaluate the impact of renovation packages.

  • 13-Nov-2007 (Conference paper NO102/7)

    Beacon's NOW Homes: Building and Renovating Homes for Sustainability (PDF 106KB)

    Lois Easton

    Sustainable Building SB07 New Zealand

  • 13-Nov-2007 (Conference paper TE106/14)

    Beacon NOW Home® (Papakowhai) Renovation Project (PDF 1.3MB)

    Nikki Buckett, John Burgess

    Sustainable Building SB07 New Zealand

  • 29-May-2007 (Presentation PRES/7)

    Retrofitting Homes to Achieve a High Standard of Sustainability

    Vicki Cowan

    Reports on the Papakowhai Renovation project.  Sustainable Living: Beacon Research Symposia 2007

  • 09-Jan-2007 (Report TE106/8)

    Sustainability Options for Retrofitting New Zealand Houses: Theoretical cost benefit analysis (PDF 382KB)

    M Phillips

    A theoretical cost benefit for options to retrofit for water and energy was carried out using ALF. At a national level, these options are worth implementing from a financial perspective: rainwater tanks (for Auckland only); low flow shower heads for high pressure systems; water efficient washing machines; water heating upgrade to SWH, instant gas or heat pump; floor and ceiling insulation.  Research undertaken to support Papakowhai Renovation project

  • 03-Jan-2007 (Report TE106/7)

    Papakowhai Renovation Project: Stage 1 Report (PDF 1.4MB)

    Nikki Buckett, John Burgess, Phil Hancock, Lisa French, Zhao Yuan

    This report details the setup and early findings of the Papakowhai Renovation project into the cost benefit of sustainably renovating ten houses. Interim findings indicate that the renovation of the New Zealand's housing stock can only be directed generally by studies such as this, since individual houses need individual specification.

  • 03-Jan-2007 (Report TE106 /6)

    Demand Management Through Water Retrofit Projects (PDF 737KB)

    Damon Birchfield

    Reviews water demand management initiatives in New Zealand. Few councils have implemented programmes to significantly reduce annual water consumption per capita at the household level. Identifies the reasons for water conservation in New Zealand and details overseas initiatives, especially Australia. Impressive water savings from the Sydney programme are highlighted. Project undertaken to support Papakowhai Renovation project.

  • 07-Jan-2006 (Report TE106/4)

    Sustainability Options for Retrofitting New Zealand Houses: Energy (PDF 262KB)

    Ian McChesney, Lynda Amitrano

    Reviews existing research into the benefits of retrofitting houses. Most target low income households with a 'standard package'. Combining efficiency/heating appliances provides better outcomes than a basic energy efficiency package alone, especially in colder areas. Retrofitting should not be standardised across New Zealand because of variations in geographic location, house type, and household circumstances.  Project undertaken to support Papakowhai Renovation project.