Category Archives: Wall Insulation

CosyWall – The Cavity Wall Insulation Experts

CosyWall is a cavity wall insulation system designed to deliver excellent INSTALLED performance, rather than just stating misleading ‘bale’ R-values. CosyWall is manufactured by one of the worlds best insulation material manufacturers. The product is tested to ensure the material’s suitability for local conditions and this material, combined with the CosyWall installation system is CodeMark certified and NZ Building Code compliant.

CosyWall was a pioneering external wall cavity insulation system (EWCIS) in New Zealand and the first to use water repellent insulation made from specialist glasswool. CosyWall is installed dry (not a wet spray insulation foam) and retrofitted to older homes via a series of small holes. The installation takes place via the internal linings or external cladding. This eliminates the need to remove wall linings or the cladding to insulate walls.

CosyWall makes a huge difference to your home comfort because walls are the 2nd most important area to insulate (after the ceiling), with up to 35% of heat lost through the walls.

Why Cavity Wall Insulation – The Convection Cycle

Warm air rises, then cools when it makes contact with cold surfaces, such as un-insulated walls, ceilings and windows. Once cold, the air sinks to the floor and gets tracked back to the heating source. Then up it goes again as hot air and on goes the convection current cycle, all within your home, making your home cold, damp and drafty. Even with everything shut. Home owners feel the cold and drafts mostly on the floor, but don’t be fooled, underfloor insulation will not solve cold and drafty floors. It will take the chill off the floor for feet, but it is important to realise that the priority when insulating your home from cold in winter and hot in summer, is to work from the top down. Start with the ceiling, external walls, good thermal drapes (or retrofit double glazing) followed last of all by underfloor insulation. It’s really that simple!

CosyWall has a nationwide network of licensed installers who can provide a free quote for even the most remote regions around New Zealand. And CosyWall’s parent company is a member of IAONZ (Insulation Association of New Zealand) and is a current representative on the board.

Please visit our ‘FREE QUOTE’ page and provide some basic contact details and one of our distributors will be in touch within 24 hours.

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.

 

 

 

 

Existing Wall Insulation Options

You don’t need to remove linings to install existing wall insulation. These can be insulated by drilling and filling holes through the external or internal lining and installing an existing wall insulation system. With these types of existing wall insulation systems there are usually three to four 15-25mm holes drilled in the wall, about every 500mm around the building.

Dry Fibre Existing Wall Insulation Systems

Total R-value of R2.2 -R2.9 is achieved in a typical 90-100mm wall cavity with a high density dry fibre system (if installed correctly).

Dry fibre, water-resistant CosyWall insulation has been installed into New Zealand homes since 2002. CosyWall is installed at an optimum design density to prevent future settlement and ensure that the Total R-value is achieved and maintained. With the CosyWall system holes are plugged with filler immediately after the existing wall insulation is installed, then the external cladding is sanded, primed and finish coated.

existing wall insulation wallinsulation

Tests on the CosyWall existing wall insulation system indicate no moisutre wicking after 30 days and no settlement after twelve months (at the design density). CosyWall insulation also prevents potential fire spread in the cavity and reduces noise transmission through walls.

Wet Foam Existing Wall Insulation Systems

Dry fibre systems should not be confused with wet foam products, which are usually manufactured on site from urea formaldehyde chemicals and water (or occasionally urethane foams). Installation of Wet systems is more complex, which often means long-term that the Total R-values (installed) are considerably less than that stated by suppliers.

If you decide to use a wet foam existing wall insulation remember the following:

The wet foam process requires 25-30 days full home ventilation to aid curing and reduce formaldehyde levels.

Ideally, the home should not be occupied during this period.

External wall hole plugging should not be completed until full curing is complete and internal wall moisture content is less than 24%.

Serious concerns about the suitability of wet foam for existing wall cavities have been raised by Department of Building & Housing (Determination report 2008/35) and which are available on their respective websites.

There are also conserns around the thermal performance of such systems, and Branz report SR233 states 6% perimeter and thickness shrinkage from framing timber as the foam cures – which reduces the manufacturers claimed R2.9 to a Total R-value (installed) of R1.0 – R1.6

When making a decision on your existing wall insulation. system get advice from the experts.

Contact your local CosyWall distributor at www.cosywall.co.nz or call 0800 267 992

Why should I get wall insulation?

Up to 35% of the heat can escape through your walls so insulating just the roof and underfloor—and leaving the walls uninsulated— is like going out in cold weather dressed only in your hat and boots.

CosyWall™ insulation was developed to solve this problem by installing wall insulation without having to remove external cladding or internal linings and has been used successfully in thousands of NZ homes since 2002.

With CosyWall Insulation you’ll be cosy all year round—without using any more energy. Typically we can achieve an R-Value of between 2.8 and 3.9, plus CosyWall is higher density than traditional wall insulation batting without the common edge gaps.

What is the CosyWall Insulation System?

The CosyWall process begins with our Licensed installers undertaking a free building assessment. After receiving your written acceptance of our contract, our Licensed installers will retrofit wall insulation through small holes your external cladding or internal linings. As part of this wall insulation process they will also repair any holes or other damage identified during the site assessment. External wall installations are primed and finished with the finish coat you provide, so it’s pretty difficult to spot where we’ve been. For internal installation you’ll have options for rough stop or a ready to paint finish.

CosyWall insulation is a water resistant, non-combustible mineral wool with no added formaldehyde. It is odourless and does not provide food for vermin and it complies with the New Zealand Building Code as a non-hazardous material.

A great investment

External wall insulation is one of the best investments you can make. With external wall insulation you will receive a great return on investment, plus you will receive immediate comfort and satisfaction. External wall insulation is installed once, done right and lasts a lifetime. And the best news is it will reduce your heating bill and has no ongoing costs.

Is Retrofit wall insulation right for my house?

CosyWall is designed to provide effective thermal external wall insulation for older homes with water-tight external timber framed wall cavities (constructed before 1990), with suitably fixed internal linings and external weatherboard, fibre cement, plywood, stucco or brick claddings.

BUILDING CODE COMPLIANCE

CosyWall™ insulation meets or exceeds NZ Building Code sections B2, E2, E3, F2, H1 requirements when used in buildings at any geographical location in accordance with the manufacturer’s instructions. Our installers can help with any paperwork that your local council may require. And because CosyWall is CodeMark certified your building code compliance is guaranteed.

If you are looking for a green retrofit wall insulation solution then you will be pleased to hear that each bag of CosyWall insulation contains over 45 recycled glass bottles with up to 80% recycled glass content.

Installing retrofit wall insulation will give you a warmer, drier, healthier home – and lower energy bills – so what are you waiting for?