Your HomeFit online check report

HomeFit and the Healthy Home Standards recommend installing a groundsheet. A DIY install can cost as little as $200. See the EDA Factsheet on ground moisture barriers for step by step instructions.

Insulation companies can install it for you relatively cheaply, especially if you also need underfloor insulation done at the same time.

While you're looking under the floor check that air vents in the walls of the crawl space are free from vegetation or dirt building up outside. Air vents are often too small, blocked or not in sufficient numbers to create good cross-ventilation under a home.

Time for a top up. HomeFit and the Healthy Homes Standards require at least 120mm of insulation but, if you're adding new insulation on top of your existing we recommend at least R1.8 is laid over the joists in most of the North Island and R2.4 in the South Island and Central Plateau. A supplier directory is provided at the end of this report.

You may have downlights that require a gap in the insulation. These will need to be upgraded to meet the HomeFit standard, as they could reduce the effectiveness of your insulation (see an installer or electrician). 

HomeFit requires either 'good' curtains or double glazing in the living spaces and bedrooms. This home has neither.

Curtains are the unsung heroes of modern, warm, energy-efficient homes. By “good” we mean at least two layers, full length to the floor, and/or closed at the top (by a pelmet, the ceiling, or tight-fitting track). The thickness of the material is not as important as the number of layers, as it’s the air that’s trapped between the layers that gives the curtains the insulation ability.

Good curtains trap cold air behind them meaning less likelihood of cold draughts from the windows.

For those areas where full-length curtains are inconvenient or just not possible (above heaters or kitchen benches for instance), we recommend Roman or cellular - sometimes called honeycomb - blinds. These should still be tight fitting on the side and against the sill and have at least two layers of blind material. Venetian blinds (whether wooden or aluminium) or shutters are ineffective at keeping in warmth (and therefore don’t pass HomeFit), but have their uses in managing overheating, glare and privacy.

For more information, see the Eco Design Advisor Curtains factsheet.

The home also does not have double glazing. Double glazing can double the performance of single glazing and will make a room noticeably more comfortable in winter. For more information, go to the Gen Less Double Glazing page. A supplier directory is provided at the end of this report.

Cheaper alternatives include window insulation kits, a DIY install, where you stick plastic film to the inside of a window frame to create a still air space between the plastic film and the cold glass - a form of secondary glazing. Kits can be purchased from DIY stores and environment centres.

Electric heaters (fixed, potable, panel, micothermic, convectors etc) are suitable for small, well-insulated living areas and bedrooms. They are relatively inefficient, small-scale heaters compared with heat pumps.

You may want to consider upgrading to a heat pump or other larger, fixed, efficient heating devices. Electric heaters are only acceptable under HomeFit and the Healthy Homes Standards for small, well-insulated living areas.

Electric cylinders are the most common form of hot water heating in New Zealand but they can be relatively inefficient because heat is constantly escaping from the stored hot water.

Electric cylinders are accepted under HomeFit provided that they are well insulated. Newer cylinders (installed after 2002) usually come factory fitted with enough insulation but older cylinders should be wrapped.

Wrapping cylinders can save a lot of energy over the lifetime of the cylinder. Cylinder wraps can be bought from a DIY store and are easy to install. You can also improve efficiency by insulating the first metre of the hot water pipe leading from the top of the cylinder (lagging). Lagging can be bought from your local DIY or hardware store and is simple to install. For more information see this Energywise advice on hot water.

Replacement LED bulbs are widely available and very good value for money, especially in areas of the home where the lighting is used a lot like in the main living space and kitchen.

You may have downlights that require a gap in the insulation. These will need to be upgraded to meet the HomeFit standard, as they could reduce the effectiveness of your insulation (see an installer or electrician).