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New data on houses with mould

Heating type, region and tenancy all have an impact on the numbers of houses with mould.

Late last year we published some findings of Census 2018 into damp and mouldy houses. The figures showed that visible mould larger than an A4 sheet of paper was always present in 4.3% of homes (64,536) and sometimes present in 12.6% (188,319).

The research firm BERL (Business and Economic Research Ltd) has now dug deeper into the data and come up with some very interesting findings:

  • For New Zealand overall, 11% of owner-occupied houses had mould, while 23% of rented houses had mould.
  • Regionally, Northland had the largest proportion of houses with mould (16% owner-occupied, 28% rented.)  Marlborough had the lowest proportion (7% owner-occupied, 14% rented).  
  • Households with only portable gas heaters have the highest proportion of households with mould issues at 29%, followed by households with no heating (25% have mould), then households with only electric heating (24% have mould).
  • Of the houses with heat pumps or fixed gas heater only, heat pump and electric heater, or heat pump and wood burner, less than 15% had mould issues.

You can find more details here.




Building Code comment deadline extended

MBIE has extended the deadline for the consultation on the Building Code updates to 17 April.

The 3-week time extension is recognition of the pressures from dealing with COVID-19 risks. The new closing date is 4pm Friday 17 April 2020.

Among the changes related to sustainability are:

  • Providing more options to comply with the Building Code for surface water drainage. This involves a new Acceptable Solution for the design and installation of stormwater drainage systems and making it easier to determine rainfall intensities for specific locations.
  • Providing a new Acceptable Solution for waterproofing in bathrooms, kitchens and laundries by referencing the Waterproofing Membrane Association Code of Practice for Internal Wet-area Membrane Systems.
  • Providing additional options to manage overflow risks in kitchens and laundries in adjoined household units.

Other changes involve the clauses C Protection from fire, G9 Electricity and G13 Foul water.

You can find more information here.




COVID-19 advice for the building sector

MBIE is providing guidance for construction on its Building Performance website.

The Ministry of Business, Innovation and Employment is updating its website with COVID-19 information here.

WorkSafe has useful information, including around notifications required, here.

The main government website with COVID-19 advice is here.