Retrofit Wall Insulation Christchurch

Up to 40% of your home's heat is lost through the walls. Wall Insulation can help solve this issue.
Brick Wall Insulation

Why Choose Blown Wall Insulation?

Canterbury Insulation specialises in providing wall insulation throughout Christchurch and beyond. We use a dry fibre product known as CosyWall Insulation which is manufactured as a high-performance wall insulation product that’s easily retrofitted into older New Zealand homes. CosyWall Insulation is blown into your home through the interior or exterior walls and once installed, the holes are repaired and painted over so you’ll never know the job was done.

CosyWall Insulation has been installed in New Zealand homes for more than 20 years and is only available through authorised installers, like Canterbury Insulation. It’s a proven retrofit wall insulation product installed in thousands of Kiwi family homes.

High Thermal Performance

Our high performance wall insulation can help to reduce your homes heat loss by over 30%.


Our wall insulation products are Codemark certified and regularly auditied giving you peace of mind.

50 Year

CosyWall Insulatin is highly durable and designed to last the life of your building. It won't shrink or slump over time!


Wall insulation helps reduce your carbon footprint by improving the energy efficiency of your home.

The Leaders In Wall Insulation in Christchurch And Beyond

As industry leaders, we have been providing wall insulation in Christchurch and beyond for many years. At Canterbury Insulation, we have the experience and expertise to deliver the most cost-effective and beneficial solutions for your home. Wall insulation is a critical component of your home and will help you to lower your energy usage, resulting in lower electricity bills from your heating and air conditioning and therefore reducing your carbon footprint. Wall insulation reduces the transfer of heat in and out of your home, so your living environment will be significantly more comfortable. Whether you are building a new home or want to retrofit wall insulation into your older home, you can count on the professional team at Canterbury Insulation to get the job done.

Why Should You Invest In Wall Insulation?

If you’ve been thinking about investing in wall insulation for your Christchurch home, don’t delay any longer. Every day, more and more New Zealanders are discovering the benefits of wall insulation. The CosyWall Insulation product has been designed to deliver the highest standard of efficiency and heat protection and won’t deteriorate over time, which means once it’s in your walls, it’s not going anywhere! Available in different R values to suit your unique home environment, CosyWall Insulation acts as a defence shield – holding heat inside during winter and keeping heat outside during summer. Our retrofit wall insulation will deliver thermal efficiency to your home, keeping it at a much more balanced and comfortable temperature all year round.

Frequently Asked Questions

Does the insulation every shrink or slump?

The great thing about CosyWall Insulation is that we install it to such a high density that it’s never going to slump or shink inside your walls.

CosyWall is based on European technology and is proven overseas as well as in New Zealand. The product is not going to deteriorate over time, and once it’s in your walls, it’s there to stay. It will continue performing day in, day out and will never cost you a cent to run.

The result is a much warmer, healthier home that you’ll love to live in!

Talk to the team today about having CosyWall Insulation installed into your home.

Can you install into brick homes?

One of the questions we get asked on a regular basis is if we can install CosyWall Insulation into a brick home. Yes, we can install CosyWall into a brick house, and CosyWall is CodeMark certified to be installed into brick houses.

The product is a specialised German engineered product that’s been designed to be installed into the double brick cavity homes in Europe. CosyWall is designed to go against wet or damp surfaces and includes a water-repellant with specially designed fibers making it ideal for New Zealand brick homes.

What does R-Value mean?

We often get asked about R-values in CosyWall. An R-value is simply a measure of a thermal resistance of an insulation product. The higher the number the better it will retain heat inside your house.

CosyWall Insulation has the highest R-value that’s obtainable in this type of product and is equivalent to the top batts and blown insulation products available in New Zealand.

Can you install from the inside?

CosyWall Insulation can be installed from either the outside or the inside of the house.

Internal installations are usually only done when you’re renovating or redecorating the inside of the home. External installations are much easier and can be done all year round.

Talk to the team at Canterbury Insulation today about installing wall insulation into your home.

How long does it take to install?

Most people are surprised how quickly CosyWall Insulation can be installed. Officially it depends on the size and complexity of your home, but in most cases, the installation can be completed in 1 to 2 days.

No need to head away for the day, however, if so when you return your home will be filled with CosyWall Insulation and you won’t believe the difference!

Installing CosyWall Insulation

Contact Us Today For Your Wall Insulation

Are you ready to reduce your home’s heat loss by over 30 per cent? Now is the time to take action and enquire about our retrofit wall insulation product. Codemark certified and regularly audited, you can have peace of mind knowing our retrofit wall insulation products are safe for your home. Highly durable and designed to last, our product doesn’t shrink or slump over time. Save yourself money on your energy bills and improve the efficiency of your home today. Get in touch to find out more about our products and arrange a home inspection with the leaders in wall insulation in Christchurch and beyond today.


Technical Resources and Brochures

Cosywall Technical Specifications

If you're after more technical information about CosyWall Insulation download this Technical Data Guide.

Codemark Certification

Here's the details on the CosyWall Insulation CodeMark certification.

Hear from our clients

Don't just take our word for it - Here's what our clients are saying about us!

We have noticed the differnce, we don’t have a lot of heating in the house and have decided we won’t need anything serious now that we have been completely insulated. We will be referring you and your company to all we get the chance too.

Wall Insulation

I have just put CosyWall into my older wooden house which was always colder inside than outside in the winter. The heat pump had to work extra hard but still had to wrap up in a blanket to keep warm.

Guernersey Street
Wall Insulation

I would recommend CosyWall to everyone for a warmer, less draft and quieter better sleep and less worry about power bills that I couldn’t pay. The staff went out of there way to do a excellent job with no stress.

Wall Insulation

Since you have insulated our ceiling and underfloor we have noticed a huge difference in how warm our house is. Thank you to you and your team.

Ceiling and Underfloor Insulation

Thanks for the excellent service, Arron was very conscientious and hard working, he took the time to explain what he was doing a very professional job. He is a real asset to your company, thanks for a warmer house.

Wall and Ceiling Insulation

I just wanted to say thank you for a job well done, please pass my thanks onto your team, they couldn’t of been nicer or more focussed on the work at hand. They answered any questions that I asked and did a great job.

Wall, Ceiling and Underfloor Insulation

Thank you for a stellar job of insulating our walls of our house. Your guys were fast and professional and by the end of the day we noticed a massive difference in how warm our rooms were. Happy to recommend your services.

Wall Insulation

We are very happy with the job the guys did and can definitely feel a big difference, thanks again.

Wall Insulation

10% Price Beat Guarantee

Terms & Conditions

Eligibility Criteria:

  1. Our Price Beat Guarantee applies exclusively to mineral glass wool blown-in ceiling insulation and mineral glass wool blown-in wall insulation. It does not extend to other types of insulation, costs related to consent exemptions, travel, or accommodation.
  2. To be eligible for the Price Beat Guarantee, customers must provide a personalised quote from a competitor that includes:
  • The current advertised price.
  • The square meter area of insulation required.
  • The specified R-Value.
  1. The quote from the competitor must be valid and not have expired.
  2. The Price Beat will be calculated based on the competitor’s advertised price, inclusive of GST.

Additional Terms:

  • Canterbury Insulation reserves the right to modify, end, or revoke our Price Beat Guarantee at any time without prior notice.
  • The Price Beat Guarantee will not apply to competitor’s retail prices that are already discounted.

The team at Canterbury Insulation would love to discuss how we can make a real difference to your home.


The team at Canterbury Insulation would love to discuss how we can make a real difference to your home.