Underfloor Insulation for New Zealand Homes
Blown Floor Insulation
For high thermal & Acoustic performance
Introducing a better way to insulate Floors

Warmafloor blown floor insulation is the ideal solution for insulating the floors and mid floors of new and existing homes. Because of its versatility, Installers can work efficiently because blown-in insulation fills spaces around joists, wires, pipes and irregular-shaped cavities creating a complete thermal and acoustic barrier for the floors and mid-floors of your house.
Insulation can be blown at different densities, which means Warmafloor is the perfect solution for applications where you’re looking for high-performance insulation combined with a wind-wash barrier at an affordable installed price.
Warmafloor has been installed since 2002 and is tested to NZS4859 standards. Because it is blown into place, it fills the space between the joists without cutting or tearing to fit, even in a tight sub-floor space.
What matters in underfloor insulation
- Easy to install
- Resistant to moisture
- Held securely in place
- A proven track record
- Meets H1 requirements
- Installed in line with NZS4246

Underfloor Insulation
Warmafloor provides a superior solution by combining high-performance blown insulation with a wind-wash barrier, significantly improving thermal efficiency, delivering year-round comfort.

Mid Floor Insulation

New
Builds
See how Warmafloor blown insulation is used in underfloor, mid-floor and new build applications to create warmer, quieter, and more energy-efficient homes.
Try our Floor Insulation Calculator
Blown Floor Insulation Cost Calculator
Enter the total floor area of your home in square metres to calculate an estimated cost for blown floor insulation.
*This is an estimate only and includes GST. For a formal written quote, fill in your details below.
Like a formal written quote? Enter your details and a Safe-R team member will be in touch.
Thanks. Your details have been sent to the Safe-R team and we’ll be in touch shortly with a formal written quote.
This estimate assumes product installed at a 140mm depth at a 19kg density, delivering an installed R-Value of R3.6.
Warmafloor Benefits
Warmafloor Insulation is an unbonded, Glasswool insulation designed with optimal thermal properties and excellent coverage as well as blowing characteristics. Moreover, Warmafloor can be installed into both new build and existing floors as well as midfloors.
It can be used to form the total thermal solution or as an additional thermal layer to existing insulation. Warmafloor can only be installed by approved installers to ensure the highest quality and installed performance.
Our Insulation can be used for both retrofit and new build applications. The product is specifically designed to fill all gaps and voids, thereby creating a complete thermal barrier against heat loss or gain. The product can be installed in most floors and midfloors.
Additionally, the product also has excellent acoustic performance and is made with up to 80% recycled post-consumer glass.
Warmafloor Insulation is capable of achieving very high installed R-Values. This makes it the perfect insulation product for ensuring compliance with the new H1 insulation standards. Click here to view further technical information on Warmafloor.
High Thermal Performance
Blown insulation makes it simple to achieve high thermal performance.
Reduces
Noise Transfer
Warmafloor Insulation helps absorb sound waves and reduces noise transfer in the home.
Fast Installation
Warmafloor is fast and easy to install by accredited installers and available nationwide.
Good for the environment
Warmafloor is manufactured from up to to 80 percent recycled glass content.
Why Choose Warmafloor
The question is more why wouldn’t you choose Warmafloor?
Warmafloor Blown Insulation is ideal for both retrofit and new build applications. Not only does Warmafloor Insulation provide consistent thermal performance against outdoor temperatures, but it also helps maintain comfortable indoor temperatures. In addition, it can be installed at high densities alongside a windwash barrier to further enhance thermal performance and achieve high R-Values year-round. It’s made with recycled glass and can be quickly and efficiently installed into most homes.
Learn more about Warmafloor Insulation by clicking the link below.
Healthier Homes
High Performance
50 Year Durability
Energy Savings

Request a Quote
Interested in a quote for your property? Fill out the form and one of our team members will be in touch shortly.
Underfloor Insulation for Wooden and Timber Floors

Most New Zealand homes built before the 1990s sit on a timber floor over an open sub floor space. The floorboards are usually the only thing between your living room and cold air and moisture under your home, and timber floors are not an effective thermal barrier. This is why wooden floors feel so cold in the winter, regardless of how long the heater has been running for. It's also why so much of a home's heat loss happens straight through the floor.
Warmafloor is blown in underneath the floorboards, between the floor joists, and held up against the underside of the floor with a special membrane barrier called a BIB. Because it is blown rather than cut and fitted, it fills the full width of every joist bay and packs in around pipes, wiring and the irregular framing you find under an older house. Warmafloor provides a complete and effective thermal barrier to the underside of your home.
It also prevents air and moisture moving up through the gaps between floorboards, which is often the first thing people notice in any home with polished timber floors.
Underfloor insulation options for a timber floor
Until recently, insulating an existing wooden floor meant fitting a segment or blanket product up between the joists and holding it there. This was often paired with the installation of a vapour barrier pinned to the ground. Those products work, but they have to be cut around every pipe and cable, and the joints and gaps left behind are exactly where heat loss occurs.
Blown insulation is a loose glasswool material, held in place with a membrane that replaces the need for a ground vapour barrier. The nature of blown insulation means that when it's installed, it takes the shape of the cavity instead of you having to make the cavity take the shape of the product. This provides an effective and consistent thermal barrier across the entire floor.
Unlike other forms of insulation, it can also be installed at different densities, which is how Warmafloor reaches higher installed R-values under a timber floor than most other insulation products.
Insulating an existing wooden floor
Warmafloor Insulation can be easily installed in both existing timber floors and new builds by authorised Safe-R installers. If you want to know what it costs to insulate the floors in your own home, put your floor area into the calculator above and you will have an estimate in a few seconds.
For A
Green
Future
Warmafloor Insulation is made with up to 80% post-consumer recycled glass!
FAQ
Warmafloor is made from up to 80% recycled glass as well as inert materials that are non-combustible and therefore can help inhibit the spread of fire. The most critical factor for safe, long-term performance is a correct installation system. Warmafloor is a proven performer since 2002.
Warmafloor Insulation is extremely durable and has a life expectancy of over 50 years!
Quite simply, floor insulation works to keep the outside temperature out and the inside temperature in! In other words, think of it like a chilly bin or vacuum flask — if you put hot food in, it stays warm, and if you put cold food in, it stays cold. Since heating and cooling account for 50 to 70% of the energy used in the average home, it’s easy to see why insulation matters. Without it, inadequate insulation and air leakage waste a significant amount of energy in most homes.
Correctly designed & fitted insulation:
1. Saves money and our nation’s limited energy resources
2. Makes your house more comfortable by helping to maintain a uniform temperature
3. Keeps your house drier and healthier.
On the other hand, poorly insulated homes often feel cold and damp in bedrooms and service areas, leaving occupants crowded around a single heater to stay warm. By contrast, homes insulated with the full proven Warmafloor system use similar amounts of energy to keep the entire house at a healthy, comfortable temperature. Therefore, that’s why the Warmafloor insulation system is a smart investment for your home.
If you’d like to know more about Warmafloor floor insulation give our friendly customer service team a call on 0800 267 992 or send us a message!
Until recently, the only way to retrofit insulation to your floors was to use a segment or batt product. However, these products typically have lower thermal resistance values, and the installation process can often leave gaps or voids when fitting around pipework or cables.
By contrast, Warmafloor Insulation is a blown insulation product. It’s installed under the floorboards or within your mid-floors, in between the floor joists, using a specialised installation process that ensures consistent coverage.
Blown insulation can be installed at different densities so is the perfect insulation where you’re looking for a high performance thermal and acoustic insulation product. The installation process is quick and easy, and the product fills up all the gaps and voids typically left by other products.
Warmafloor is a premium insulation product, and one of the best insulation products available allowing you to keep the outside temperature out, and the inside temperature in!
In addition, the total installed thermal floor insulation effectiveness of Warmafloor is superior to batting or blanket insulation, because it fills the entire floor cavity without joints, gaps, thermal bridging, or vented cavities that are commonly found between linings and traditional materials. As a result, it provides premier insulation values.
By comparison, batting insulation or blanket materials require at least two layers to achieve the same installed thermal effectiveness as Warmafloor insulation.
So why wait? Talk to us today about installing Warmafloor insulation in your floor or midfloor.
Still Have Some Questions?
Looking for your local installers?
- If you live in Canterbury, find your local insulation installers in Christchurch.
- If you live in wider Auckland region, find your local insulation installers in Auckland.
- If you live in wider Wellington region, find your local insulation installers in Wellington.