Everything from breathing to washing to cooking causes moisture to build up, and if it is not controlled, mould will start to grow. A dry, well-aired house or flat is easier to heat and healthier for you and your family.

Preventing Mould

To keep mould at bay:

  • open windows and doors when you're home
  • open windows so steam can escape from cooking or bathing
  • open curtains early in the morning and close them when the sun goes down
  • keep lids on pots when cooking
  • wipe condensation off walls and windows when it happens
  • hang washing outside to dry
  • open windows when using a clothes drier so moisture can escape
  • dry clothes and shoes before putting them away
  • leave wardrobes slightly open for ventilation
  • keep the shower curtain hanging inside the shower/bath so water doesn't drip on the floor, and wash the curtain every few weeks
  • use an electric heater rather than gas, which creates a damp heat
  • pull beds and furniture away from the walls so they can breathe
  • keep only a few plants inside.

Removing mould

Wash mould with diluted household bleach (one part bleach to three parts water mixed together) as soon as it appears, as it's harder to remove once it has been there a while.

Use a clean sponge or cloth when washing off mould and rinse it often to reduce the risk of it spreading. Wear gloves when washing it away - be careful not to splash any liquid on your clothes or in your eyes and open windows to improve airflow while you clean.

Read our factsheet on controlling mould in your home [PDF, 2.2 MB]

Pest control

We can organise pest control for you if you need it, at your own cost. Pest control is listed under 'P' in the Yellow Pages.

Rats and mice

You can do a lot to keep rats and mice away by keeping your home clean and tidy so they have no food source and nowhere to nest.

If they do get inside, mouse holes and nesting areas can be blocked with steel wool (Steelo pads).

You can get mousetraps from the supermarket or buy poisoned bait from garden or hardware shops. Be sure to set bait out of reach of children and pets, and always wear rubber gloves when getting rid of dead rodents.


Keep bay leaves or garlic in your cupboards to keep cockroaches away. Wash the floor and wall behind fridges and stoves regularly, and spray these areas with long-lasting insect spray.


Ants in New Zealand are generally harmless but can be a nuisance. Sprinkle ground or whole cloves in cupboards to keep them away.

You can also sprinkle talcum powder or cream of tartar at the point where they come inside. If you find an ant nest, pour boiling water into it.

White-tailed spiders

White-tailed spiders usually live in cool, dark areas like under bark in gardens, wood piles, litter and walls. They also hide under beds and in clothing left on the floor.

Their bite can cause pain, swelling redness and small ulcers. Use fly spray to get rid of them.

Total release aerosol pesticide cans (bug bombs) are also available from hardware stores.

Clean and Green booklet

This booklet gives you cheap and environmentally friendly hints and tips for around your home.

Download Clean and Green [PDF, 266 KB]


Page updated: 7 October 2019