Ground Moisture Barrier

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On average 250ml of water evaporates from each 1m² of ground in 24 hours – that’s 60 litres a day for a 150m² house. This moisture getting into your home causes rot, mould, mildew and affecting health.

A great way to reduce moisture levels is to install a ground moisture barrier (also known as on ground vapour barrier). This polythene sheeting will restrict the evaporation of moisture from the ground into the subfloor space. Download our ground moisture barrier factsheet here.

Contact us today for a quote. We can also let you know what payment options are available to pay for your other energy efficient products.

80% off ground moisture barrier.

Some homeowners may also be eligible* for subsidies for ground moisture barrier. If not, we have other finance and payment options available. Get a quote today and we can let you know what you're entitled to.

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Installing a vapour barrier, also known as an onground moisture barrier on the ground under your house will keep the moisture in the ground and stops the air under the floor from getting damp.

Ground moisture barrier is 250 micron polythene sheeting that is at least 0.25 mm thick and covers the ground under a house.

For the vapour barrier to be effective, quality installation is key.

• any leaks from water or waste pipes, wet areas, cladding and so on must be dealt with before the moisture barrier is laid
• check there is no surface water flowing under the building – rain should drain away from the house
• the ground under the house should be shaped so no surface water accumulates on top of the vapour barrier
• the vapour barrier should completely cover the soil & be butted up to surrounding foundation walls and piles
• the sheets should be weighted down to avoid being moved by the ventilating air movement

Contact us today for a free measure and quote, and we can install it for you as the same time as your underfloor insulation.

Need information or a quote?

We give advice and quotes on a range of products to make your house warmer, healthier and more energy efficient. Contact our Brightr team who’ll take you through how improving your property can be made easy.

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Call us on 0800 888 766

Finance & Funding

  • One Smart Energy 24 month instalment plan
  • EECA Homeowner Insulation Grants
  • ANZ up to 4 years interest-free
  • Westpac Warm Up Loans
  • Council Rates Programmes for Insulation & more
  • Mortgage Top-Ups for energy efficiency products
  • Squirrel Money
  • Q Card Finance

Onground moisture barrier is one of the best value ways to reduce moisture in your home and we have a range of finance options to make it affordable.

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Need information or a quote?

We give advice and quotes on a range of products to make your house warmer, healthier and more energy efficient. Contact our Brightr team who’ll take you through how improving your property can be made easy.


Hate filling in forms? Call us direct 0800 888 766

We answer 24 hours, 7 days a week so call us anytime.

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