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Cavity Wall Insulation Options

Cavity Wall Insulation Options

Bulk Cavity Wall Insulation Options

Before putting in any type of cavity wall insulation into existing walls, it’s important to make sure the building has been assessed by an experienced professional and is suitable for cavity wall insulation.

Bulk cavity wall insulation comes as segments or blankets. Segments (batts) are pre-cut pieces of insulation whereas blanket products are available in rolls. To put bulk insulation into existing walls you’ll need to remove the wall lining or cladding which can be expensive and disruptive. When you remove the wall lining, do a thorough inspection of the wall for any leaks, presence and condition of any wall underlay (building paper) and electrical wiring. Bulk cavity wall insulation can be made from various materials including polyester, wool, and fibreglass. Most bulk options will require separation from the cladding or protection via building paper. Whatever bulk insulation you opt for, a good wall insulation product should meet the following criteria:

  • intended for installation in walls
  • correct thickness
  • highest R-value possible for the thickness of your walls
  • right width for the stud spacing in your walls
  • incorporate protection from moisture ingress

Blown-in Cavity Wall Insulation Options

Injected or blown-in insulation is blown (pumped) into existing walls through small holes in the cladding or lining. It can be made from various materials such as urea formaldehyde foam, wool or fibreglass fibres or polystyrene beads. Some blown-in insulation products are approved for installation in walls without a wall underlay or for installation into a drained and ventilated wall cavity (like brick veneer). There are two different ways of installing blown-in cavity wall insulation into walls. From the inside, which keeps the exterior cladding and the wall underlay intact, but requires some redecoration. Or from the outside, which is much less disruptive.

Whatever blown-in cavity wall insulation option you go for, a good system should meet the following criteria:

  • intended for installation in walls (with or without building paper)
  • feature water repellency
  • provide the highest R-value possible for the thickness of your walls
  • be installed by training professionals
  • incorporate a robust and proven repair method.

WARNING – Injected urea formaldehyde foam insulation (UFFI)

Urea formaldehyde foam insulation (UFFI) is injected as foam which then dries. Research by BRANZ found that the actual R-value of UFFI insulation is about 50% lower in a house than if measured in a test lab. This is because the UFFI shrinks as it dries. BRANZ research found that a typical weatherboard wall with 100mm cavities and UFFI insulation installed has an R-value of about R1.6. An uninsulated weatherboard wall is about R0.5, so UFFI will make a difference, however it will not provide the same performance gains as bulk or blown-in insulation.

For more information of cavity wall insulation options call out team on 0800 267 992 or click here

Wall Insulation is Life Changing

A cold and damp house is unhealthy – especially for kids and expensive to heat. Likewise a noisy house can also make our life miserable too. CosyWall Insulation has a simple IMMEDIATE solution to transform not only damp, cold houses but noisy ones too. CosyWall creates a warmer, quieter, healthier home, and CosyWall makes getting Wall Insulation affordable.

CosyWall will transform your home! It’s life changing! Forget having three blankets on the bed, waking up cold or having the heater on all night! It also instantly reduces condensation on the windows, puddles on the window sills, mouldy curtains and weeping walls! All those terrible things.

Insulation is usually associated with warmer, drier homes – but CosyWall Insulation can also drastically improve the acoustics in your home! The key is fitting the insulation where it’s needed most. So if you have noise from a busy road we’d install the insulation into the external walls of your house. Alternatively, if you have noise transferring from say a lounge into a bedroom we’d fit the CosyWall in the cavity between those two rooms and again you’ll love the results!It also works in two story houses between the floors!

People can’t believe how their home becomes so warm and cosy instantly! The most common response we get is they wish they’d had it done years ago! One recent customer has 3 kids suffering from asthma, and previous winters have been really rough… since CosyWall they’ve seen huge improvements in their kids’ health. One customer who was a shift worker normally used the awful road noise from outside his house to wake up – but with CosyWall fitted he slept right through for the first time.

Most houses can have CosyWall installed in a single day and because we only need to drill small holes to install the insulation there’s very little mess. Our guys will talk you through the whole process so there’s no surprises. They’ll even tidy up behind themselves. It’s a fast, affordable, easy fix for cold and noisy houses! With CosyWall you can be confident it will be done once, done right and last a life time. So, no on-going costs or maintenance!

The system is Codemark certified and we take care of all the compliance. It’s a very easy convenient process for our customers! Their feedback is amazing!

Call us NOW on 0800 COSYWALL (0800 267992) – or email a member of our friendly team for a free assessment.





Wall Insulation Q&A

Kiwi homes are notoriously cold and damp – so investing in the correct insulation for your home can be one of the best investments you’ll make. Not only will insulation keep your home warm in the winter and cool in the summer, there are a number of other benefits – including a healthier home and of course savings on your monthly power bill. CosyWall Insulation has been around for over 15 years, but what exactly is it? Check out the Wall Insulation Q&A session below:

In a nutshell

The CosyWall Insulation system is a multi-purpose product designed to provide effective thermal wall insulation and soundproofing to your home. In most cases wall insulation will complete the homes thermal envelope. The results are amazing. Faster to warm the home, stays warmer for much longer, less noise from the road and neighbours.

How you get the insulation inside the walls without destroying my walls? And how long it’ll take to get the job done!

Most installs can be completed within a day or two. And, of course we make sure everything is clean and tidy before we leave.

What about the mess?

Most houses in New Zealand have a gap – know as a cavity – between the interior walls and the exterior cladding and it’s this cavity that allows the heat to escape. We fill this cavity with an insulating material that will help retain the heat. The insulation is literally blown into the cavity by our team of professionals who drill small holes into the walls of your house – exterior usually, but if you are thinking about refreshing your interior décor we can also do it internally too. Either way we will then fill the holes and and for the exterior installations repaint them to match your existing walls. It’s a simple, fast, clean and effective method without the mess created by removing the wall linings.

What exactly are you injecting into the walls?

CosyWall is NOT spray insulation foam, expanding foam, or spray foam insulation. It’s a DRY spray-in type insulation. This means you’re not filling the cavity of your home with moisture.  CosyWall is perfectly safe for everyone including children and pets. It has no added Formaldehyde, it’s also water repellent, durable and won’t catch fire. CosyWall is durable and will not shrink or settle in the cavity.

Is CosyWall Insulation suitable for all homes?

CosyWall Insulation is suitable for most homes build pre 1990. But to ensure it’s right for all our customers, our professional team will carry out an assessment to check suitability – importantly this assessment is Free!

Are there any compliancy or regulations I need to know about?

CosyWall Insulation takes care of all the compliance for you – so you can sit back and let us do all the hard work.

For more information or a free home assessment contact CosyWall

Getting Adequate Wall Insulation

We all know that the majority of New Zealand’s ageing housing does not have adequate wall insulation, and while an effort is being made to retrofit ceilings and floors, the absence of wall insulation dramatically reduces the benefit of this effort.

The key to good thermal performance is a completed thermal envelope – and without adequate wall insulation this is not attainable.

A variety of wall insulation systems have been retrofitted to New Zealand homes. Traditionally these were installed by small-scale operators with limited technical capabilities using products such as blown cellulose or sheep’s wool. The absence of regulated installation systems and quality moisture repellent materials put off most consumers which resulted in very few homes being retrofitted using these technics.

Expanding wet foam systems, installed via small holes in the linings, gained popularity during the 2000’s, but clarification on the requirement for building consents; coupled with bad publicity (mainly focused on the shrinkage of the foam), reduced the popularity of this system.

The good news is there are new alternatives to removing the linings or cladding when retrofitting wall insulation. Blown insulation systems are again making retrofitted wall insulation viable, and there are a number of solutions available.

If you are considering retrofitting wall insulation it is important to choose a company that uses an audited system. This should include assessment of the building to ensure it is suitable and the product shouldn’t introduce moisture to the cavity during installation. It should feature some form of water repellency, a proven cladding reinstatement method and documentation showing compliance with the NZBC.

The installation of all wall insulation requires a building consent, but exemption may apply to systems in some areas. A reputable company can help you through this process and ensure you get a great result from the new retrofitted wall insulation.

For more information or to get a free wall insulation assessment contact CosyWall

100 Day Renovation Trailer – Coming soon & featuring CosyWall

The 100 Day Renovation is currently filming in Auckland, New Zealand. After the success of the first season, Hamish is back! This time around he’s following a major renovation and remodelling of a classic NZ family home….again it must be completed in just 100 days. Coming late 2018 and featuring CosyWall Insulation!


100 Day Renovation

The 100 Day Renovation coming soon…. #100dayreno

100 Day Home 发布于 2018年7月24日周二

Insulating Walls is Easy!

Adding insulation to walls by retro fitting wall insulation used to be an unpleasant, expensive and messy task. But with the CosyWall system all this has changed. Insulating walls in now easy with this affordable, quick and clean method of adding insulation to the walls of your home, and with it’s high insulation values, it is more effective than most conventional wall insulation products. CosyWall retro wall insulation is certified for installation in most types of houses. It is compatible with most types of construction and is especially suitable for older pre 1990 houses. We can add CosyWall insulation to 99% of external claddings or internal linings, and you have the peace of mind of knowing that it has been tried and tested in thousands of New Zealand homes.

CosyWall is a dry mineral fibre which is installed through 15mm-22mm holes in the exterior cladding or interior linings. Our network of highly trained and professional licensed installers will pre-asses your property and then ensure that the product is correctly installed using infrared imaging and endoscopic cameras. They aim to leave your home the same way they found it, with no visible signs that the insulation has been installed. Insulating walls with CosyWall is cost effective, safe, and fully certified to meet NZ building codes. It doesn’t sag or settle, has no added formaldehyde, is non-combustable, and best of all, is guaranteed for 50 years. The end result is a warmer, drier, quieter and healthier home plus, of course, lower heating bills.

Adding insulation to walls is easy. Simply book a free assessment with your local CosyWall distributor here.