Wall Insulation Products


CosyWall InsulationBradford GoldEarthWool Insulation

CosyWall Insulation
CosyWall_Small_LogoCosyWall™ insulation (CWI) is a full external wall cavity insulation system (EWCIS) for providing thermal and acoustical insulation to wall cavities lined on both sides. The CosyWall insulation system includes an assessment of building suitability, licensed installation of water-repellent glasswool insulation and durable external cladding repair.

The CosyWall insulation is manufactured in selected North American plants by melting and spinning a blend of inert, natural minerals. It is the only formaldehyde free, non-combustible, water repellent, durable dry-blown wall insulation with a trouble free history since 2002 of insulating New Zealand external wall cavities under the brand name Qmulus BIB. CosyWall is packed in plastic or CWI bags.

CosyWall insulation is a multi-purpose product designed to provide effective thermal and acoustical insulation for existing water tight external timber framed wall cavities, fibre cement, plywood or sealed masonary veneer claddings. In addition CosyWall insulation can be used to insulate new walls or provide acoustical insulation on internal walls.

CosyWall insulation is installed dry, does not transfer water via wicking and, if soaked, dries within 30 days. It is low bio-persistent, formaldehyde free mineral wool, which is odourless and does not provide food for vermin. CosyWall insulation does not represent a health risk to installers or occupiers of insulated buildings. Face masks and overalls should however be worn when working with all insulation or dusty drywall materials.

To find out more about the detailed product specifications of CosyWall Insulation Technical Data PDF.

Bradford Gold Glasswool
Bradford Gold glasswool is manufactured by CSR, Australia from bonded, resilient glass wool blanket and cut into segments or rolls. It offers excellent long term thermal and acoustic insulation at a competitive price to similar quality materials.

Glasswool insulation product is not a hazardous product and is safe to install and use in your home or in other insulation applications for the life of the building.

Bradford’s range of Gold High Performance insulation has been engineered to provide the highest levels of thermal performance available so you can choose the level of comfort your family deserves.

Bradford Gold High Performance insulation products boast R-Values of R5.0 and R6.0, the highest level of home insulation available for New Zealand homes. When you select Bradford Gold High Performance for your home you will be helping to create the best possible environment for your family.

Bradford Insulation produces a range of products with different R-values to meet the energy efficiency requirements of the New Zealand Building Code.

Call Us for more information about Bradford Insulation

earthwoolEarthWool® Insulation
Knauf EarthWool® is manufactured by Knauf, Germany from bonded, brown glass wool blanket and cut into segments or rolls. It is the only brown formaldehyde free glasswool available locally. It offers excellent long term thermal and acoustic insulation at a competitive price to similar quality materials.

EarthWool® underfloor insulation is made from highly resilient, inorganic glass fibres bonded by ECOSE® Technology, a revolutionary new binder based on rapidly renewable bio-based materials rather than non-renewable petroleum-based chemicals. ECOSE® Technology reduces Knauf Insulation binder embodied energy and contains no phenol, formaldehyde, acrylics or artificial colours found in traditional glasswool insulation.

EarthWool® underfloor insulation provides a cost-effective thermal and acoustical barrier for energy-efficient construction. The insulation’s consistent quality, low dust, and clean-cutting resilient wool makes installation fast. EarthWool® underfloor insulation can be used in timber and metal frame applications in residential structures. These applications include thermal and acoustical treatments to floors. Knauf Insulation offers EarthWool® underfloor insulation in a range of sizes.

Call Us for more information about EarthWool®

CosyWall Insulation

Wall insulation falls into two categories lined cavity/Retro-fitted insulation and unlined cavity insulation and is the second thing you should look at, particularly since an estimated 35% of the heat in your home is lost through the walls.

Retro-fitted insulation

Retro-fitted wall insulation is perhaps the least known and applies to most older properties. If your house was built before 1990, it probably has no wall insulation.
Retro-fitted wall insulation, isn’t something you can do yourself and requires a certified installer drilling small holes into your inner or outer walls and pumping or blowing in the insulation.

CWI inside

Does the type of wall I have affect my options for insulation?

Yes, and No. As long as you have a cavity or space that can fit insulation then the type of wall does not matter. For unlined cavities (no gib) Insultech uses a segment or biscuit type insulation. Please see our New build page for more details on unlined cavities.
For Lined cavities Insultech uses a product called CosyWall™ insulation.

CosyWall™ insulation

CosyWall™ insulation (CWI) is an external wall cavity insulation system (EWCIS) for home insulation providing thermal insulation and acoustical solutions to wall cavities that are lined on both sides.

CosyWall is NOT a spray foam or expanding foam insulation. It is a DRY blow in type insulation and can be installed through the external cladding or internal plasterboard. CosyWall is manufactured by melting and spinning a blend on inert, natural minerals, similar to Rockwool insulation. CosyWall insulation has no added Formaldehyde, is Non-combustable, Water repellent, and a durable Dry blown wall insulation.

The CosyWall wall insulation system is a multi-purpose product designed to provide effective thermal wall insulation and acoustic wall (soundproofing) solutions for existing internal walls and water tight external timber framed wall cavities with fibre cement, plywood, timber weatherboard or sealed masonry veneer claddings.

Are there any other jobs that need to be done in my walls before the insulation work?

Electrical work – you want to add more power points or add cabling its best to have them installed before the insulation is installed. Don’t worry if you can’t do this as CosyWall is a loose product with no glues or binders if you need to add a wire or cable at a later date you can still easily feed it past.
Plumbing – if you are doing any plumbing work in your walls. Its best to have this done before or ask us not to install in the area where the plumber is going to work. Due to CosyWall having no binders, once the plumber or trades person pulls it out they won’t be able to reinstall it without the correct equipment and will need to put a segment type insulation into the wall where they are working.

Unlined cavity insulation

Unlined cavity insulation is usually installed during construction of the house but can also be installed during renovation where the builder removes the wall linings and puts insulation segments into the walls before relining the walls. Overall this is usually a very costly option as Gib, skirting and scotia all need to be replaced. For more information, please see our new build page


What else should you insulate in the home?

While Wall insulation is a great way to save money, it is by no means the first form of insulation you should look at around your home.

Roof insulation
If your property has a roof with attic space then Roof insulation is the first thing you should look at, particularly since an estimated 40% of the heat in your home is lost through the roof space.
Roof insulation is cheap to buy, easy to install (you can even do it yourself) and can save you serious amounts of money over the years.
Even if you already have roof insulation in place it may be worth checking whether you have the recommended levels installed. The recommended depth for insulation is approximately 120mm – 180mm depending on where in New Zealand you live. If your roof insulation was installed some time ago there’s a good chance it’s less than that and may need a top up.