Building regulations (1)

Why are there parts of my house with no or little insulation?

Insulation was not mandatory in New Zealand until April 1978, and most homes before this date were built without insulation. Many of these homes may have had some areas insulated by previous owners, typically ceilings, and possibly under-floors for pile homes. The majority of these homes will have no insulation in their walls, and may be suitable for blow-in insulation.

The levels of insulation required were then increased in 2007, so homes between 1978 and 2007 could also benefit from additional insulation being installed. If you’re unsure about the levels or condition of insulation in your home you can  arrange an inspection of your property by an approved insulation installer. We recommend purchasing the highest R-Value that your budget allows.

Ceiling insulation (10)

How much will ceiling insulation cost?

The cost depends on the size of your house and whether you have existing insulation. For example, in an un-insulated ceiling, buying the product that will generally bring you up to the minimum Building Code Standard will cost only around $8.30 per square metre for most of the North Island, and $8.80 per square metre for the South Island (and central plateau). Alternatively, if you already have insulation and want to ‘top-up’ then you could purchase an R2.2 handy roll, which will cost around $6.33 per square metre. Depending on the size of your home, it can take around three years to realise the payback* through savings on your energy bill.

We advise that you aim for the highest R-Value your budget will allow.

How much ceiling insulation do I need?

This will vary on the type of building you have and where you live in Australia, but generally to meet the current minimum Building Code requirements you need at least R3.2 ceiling insulation in most of the North Island, and R3.6 in the central plateau and the South Island.

We advise that you aim for the highest R-Value your budget will allow.

I already have some insulation in my ceiling; do I need to take this out first?

The existing insulation may not have much insulation value, but every little bit counts and there’s no point wasting what you already have. If the existing insulation is level with the ceiling joists, you can add the new layer of insulation over the top at right angles to the original layer – this creates a continuous layer of insulation and helps prevent thermal bridging through the joists.

We advise that you aim for the highest R-Value your budget will allow.

I use my ceiling for storage. Do I need to clear it out if I am having the insulation professionally installed?

Yes, you will need to clear the ceiling of any  stored objects before the insulation is installed. And who knows, you may even find some valuable, hidden treasures too!

 

I want to use my ceiling for storage, how can I do that if it is insulated?

You or your installer can also lay insulation boards called ClimaFoam® along with an 18mm layer of chipboard deck on top to provide storage space. Click here to view.These insulation boards are made from extruded polystyrene and are designed to be placed on top of the ceiling joists instead of the glasswool insulation. ClimaFoam is a perfect solution for storage space in the ceiling space as they have high compressive strength and provide great thermal performance. You will need a ceiling hatch which is minimum 600mm wide. Having R-2.6 glasswool insulation installed between the joists plus a layer of 50mm ClimaFoam board with a chipboard deck laid top and bottom gives the same thermal performance as installing R-4.1 glasswool insulation and will eliminate most thermal bridges.

How long does it take professionals to install ceiling insulation?

Generally it should take half a day for a team of installers to insulate a ceiling, if you would like to arrange a professional install you can arrange here.

 

How long would it take me to insulate my ceiling?

Please read more detailed information here about installing ceiling insulation before carrying out any work. Having read the installation instructions it is important that you and your installation partner work at your own pace to ensure the installation is done safely and effectively,  avoid being in the ceiling space during the hottest part of the day.

Make sure you switch off the electricity supply at the mains before entering the ceiling space.

 

 

How can I insulate my skillion roof?

Installing insulation in a skillion roof is similar to installing insulation in a wall and will noticeably reduce the amount of heat transferred through your skillion roof. The most common products are R3.2 105mm Skillion or R3.6 150mm Loft Roll, or sometimes people use high density wall insulation products such as R2.6 or R2.8 wall segments. You want to maintain a 25mm air-gap above the insulation to allow for ventilation. For example if you have 140mm joists, you would want to use R3.2 105mm. If you had 190mm joists, the best option would  be R3.6 150mm.

Refer to the manufacturer’s instructions for example here.

Will glasswool insulation make my home quieter?

Glasswool insulation has both thermal and acoustic properties and will help reduce the transmission of sound from outside into your home. It can also reduce noise transfer between adjoining rooms when installed in internal partitions.

Can I install ceiling insulation myself?

Yes! Watch a video on how to install ceiling insulation here and make sure you read our detailed installation and health and safety instructions here, before carrying out any work. If you do not have the time or the confidence to do it yourself, you can arrange to have the insulation professionally installed.

Glasswool insulation (2)

What are the health effects of glasswool insulation? Is glasswool safe?

Glasswool has been in use globally for over 70 years and over 50 years of research has not found any cause and effect link between glasswool insulation and long term health problems.  When using glasswool in New Zealand look for the EUCEB and or FBS-1 logo for quality assurance.

EUCEB_OFFICIAL-CMYK-blue

FBS -1 WORLD 2014

Some types of glasswool insulation are also made without using a phenol formaldehyde binder, making them even safer to use in your home.

No-Added-Formaldehyde

Are rodents attracted to glasswool insulation?

No. Because glasswool insulation is made using glass it will not attract or provide a food source for rodents or insects.

Residential Tenancies Amendment FAQ's (2)

FAQ’s for landlords and property managers

What’s changing?

In July 2015, the New Zealand Government announced the introduction of a Residential Tenancies Amendment (RTA) Bill. This move follows trials based on a broad package of ‘Warrant of Fitness’ standards. It was deemed that a full Warrant of Fitness would be expensive both to implement and administer. Therefore, the RTA is focussed on the essentials, which have proven benefits to the health and comfort of tenants. The two key measures that will be introduced are smoke alarms and insulation.

Read more… 

FAQ’s for tenants

What’s changing?

In July 2015, the New Zealand Government announced the introduction of a Residential Tenancies Amendment (RTA) Bill. This move follows trials based on a broad package of ‘Warrant of Fitness’ standards. It was deemed that a full Warrant of Fitness would be expensive both to implement and administer. Therefore, the RTA is focussed on the essentials, which have proven benefits to the health and comfort of tenants. The two key measures that will be introduced are are smoke alarms and insulation.

Read more… 

Thinkinsulation (3)

What is thinkinsulation?

thinkinsulation.co.nz is an initiative from Knauf Insulation. The aim is to increase public awareness of the benefits of insulation and how other energy efficient measures can contribute to a more comfortable home with the added benefit of saving money on energy bills. thinkinsulation.co.nz can also arrange free no obligation quotes for wall, ceiling and underfloor insulation, using certified installers and high quality, warranted insulation products.

What are the benefits of insulating my home?

Glasswool insulation has many benefits such as:

1. Making your home warmer in the winter and cooler in the summer.
2. Making your home more energy efficient – this means making savings on your energy bills.
3. Reducing the transfer of unwanted noise from outside and between adjoining rooms.

I have solar PV system - do I need to insulate my home too?

Yes. By combining insulation, which reduces energy use, with a Solar PV system – homes can get even better value from their investment.

Adding insulation can reduce the up-front costs for the Solar PV system and can also improve the payback period for the system.

Underfloor insulation (5)

How much will underfloor insulation cost?

The cost depends on the size of your house. For example for a R1.8 glasswool with a wind wash barrier, will cost around $8.30 per square metre.

We advise that you aim for the highest R-Value your budget will allow, and if you can blow straight through the insulation think about a product with a wind-wash barrier.

How is underfloor insulation installed?

Underfloor insulation is installed from under the house and is placed hard up against the floorboards between the floor joists. It can be stapled or strapped to ensure it remains in place for the life of the building.

For more information, watch our underfloor insulation install video here.

Can I add insulation between the levels of my home to make it quieter?

Yes. Filling your mid-floor cavity can help reduce the transmission of sound between the floors of your home. This can be done at the time of building, or retrofitted with blow-in product. In many two story homes, the garage roof is a weak point in the thermal envelope.

How can I arrange a measure and quote?

Yes! Watch a video on how to install underfloor insulation here and make sure you read our detailed installation and health and safety instructions here, before carrying out any work. If you do not have the time or the confidence to do it yourself, you can arrange to have the insulation professionally installed.

Can I install underfloor insulation myself?

Yes definitely – watch a video on how to install underfloor insulation here and make sure you read our detailed installation and health and safety instructions here, before carrying out any work. Alternatively you can arrange to have the insulation professionally installed.

Wall insulation (5)

How much will wall insulation cost?

The cost depends on the size of your house and whether you have existing insulation. For example, for un-insulated walls, buying the product that will generally  bring you up to the minimum Building Code Standard will cost around $6.40 per square metre for most of the North Island (R2.2), or $12.00 per square metre for the central plateau and the South Island. Wall insulation for 90mm framing goes up to R2.8, and for 140mm framing up to R4.1.

We advise that you aim for the highest R-Value your budget will allow.

How is wall insulation installed?

There are two ways you can retrofit wall insulation – from the outside or from the inside.

For more information, watch our wall insulation install video here.

Some older houses are also suitable candidates for blow-in insulation (Jet Stream MAX) glasswool insulation is injected into the cavity from holes in the plasterboard, which are then repaired. Making it an ideal solution for increasing the energy efficiency of older homes where it is impossible to install segments.

Will adding glasswool insulation make my home quieter?

Glasswool insulation has both thermal and acoustic properties and will help reduce the transmission of sound from outside into your home. It can also reduce noise transfer between adjoining rooms when installed in internal partitions.

Can I add insulation to my internal walls to make my home quieter?

Yes. Adding insulation to your internal walls will help reduce the transmission of sound between rooms. For best results you should add insulation around your entertainment room, kitchen, laundry and bathrooms. This can be installed at the time of building, or retrofitted later using blow-in insulation.

Can I install wall insulation myself?

Yes! Watch a video on how to install wall insulation here and make sure you read our detailed installation and health and safety instructions here, before carrying out any work. If you do not have the time or the confidence to do it yourself, you can arrange to have the insulation professionally installed.