All About R-Values

Man insulating floorboards

As a homeowner researching the benefits of insulation you’ve probably stumbled across the term “R-Value”. But what is an R-Value and is it the most important aspect to consider for home insulation?

R-Value Explained

R-Value is simply a measure of resistance to heat flow, through a given thickness of material. Therefore, insulation is, at its core, meant to stop the movement of heat.

The essential “trick” with insulation is to stop the escape of heat in winter and to stop heat getting in during summer.

When it comes to an R-Value rating or number, the theory is that the higher the R-Value, the better the insulating effectiveness is. This may hold true when tested in a lab, but in the real world other factors come into play. Namely; temperature, moisture build-up and ageing.

In fact, newly laid insulation with a lower R-value can perform better than old insulation with a higher R-value. This is because the old insulation has likely accumulated moisture over time and has also lost a degree of density. How the insulation was installed is another key factor in terms of how well it performs.

Walls, ceilings and floors also have their own inherit R-Value. This value varies widely according to the type of ‘skin’ for example a double-brick wall or a brick veneer will have vastly different R-Values.

When installing insulation with a specific R-Value, its effectiveness can be affected by the heat flow through studs, joists and other building materials – a phenomenon known as thermal bridging.

DIY or Professional Installation?

When it comes to something as important as insulating your home, it really is better to leave it to the professionals.


Choosing the wrong material or simply not laying the right material properly, will severely impact the effectiveness of the insulation, and will in fact lower the R-Value – regardless of what the number reads on the packaging!

Poorly laid insulation can lead to higher energy bills and end up costing you more money.

Not using enough insulation and not having the right equipment to install the product are other common issues we see when it comes to a DIY installation.

In Summary..

So hopefully you now have an understanding of what an R-Value is, and why it isn’t the only thing to consider when it comes to choosing insulation for your home or workplace.

Choosing the right material and the right quantity, along with an expert performing the installation will ultimately save you more money in the long run. You’ll have cheaper energy bills and peace of mind, knowing that the insulation that you paid for is working to its maximum potential.

Underfloor insulation – get the lowdown

Family lying on the floor

Living in an existing home or building new? Heating and energy experts agree that high-quality underfloor insulation is a great investment.

Imagine the picture – winter is settling in and your family is enjoying the benefits of professional wall and ceiling insulation. Your heating bills are massively reduced and the word of the day is Cosy.

Your doors and windows are properly covered and the good old draught-excluder is in place.

Yet, every now and then, a gasp of winter air sends a shiver up your spine. Why?

Chances are, the cold air is coming through gaps in your floorboards or rising up through an uncarpeted floor surface. You need underfloor insulation.

Greenstuf® from 4 Seasons

4 Seasons Home Insulation is the place to go and Australian-made Autex Greenstuf insulation material is the perfect solution for your home.

Made of 100% polyester (including at least 45% recycled polyester fibre), Greenstuf is recyclable at its end of life and completely free of added chemicals like formaldehyde-based binders or fibres.

Backed by a 50 Year Product Durability Warranty, Greenstuf exceeds Building Code of Australia requirements and is unaffected by moisture, mould or mildew. Greenstuf is naturally resistant to vermin and non-flammable.

Underfloor Insulation vs Underfloor Heating

People in cooler climates often consider floor heating to increase their comfort levels at home. Yet, without underfloor insulation, even underfloor heating is less effective. There is no point creating warmth without ensuring that that the warmth can’t escape.

According to, “Failing to lay it (underfloor insulation) can cause all sorts of nightmares further down the line and it’s often been the root cause of many peoples disappointment with their underfloor heating installation.”

Complete the Home Insulation Package

Enveloping your home with floor, ceiling and wall insulation is the way to guard against the discomfort of hot conditions in summer and cold conditions in winter.

Quality underfloor insulation will make your inside floor surface the same as your indoor temperature – cosy – instead of the ground temperature around your home, which will be several degrees lower. The same is true of summer temperatures.

Save money on expensive heating and cooling costs by investing in insulation and the huge difference it makes. Who knows? You may never need those fluffy slippers again!!

Speak to 4 Seasons Home Insulation to arrange a free inspection and quote on your home.

Wool Home Insulation Resists Vermin In Your Roof

Woolcell Roof Insulation

Wool home insulation may not be your first thought when considering pest management or fire readiness, so prepare yourself for some exciting information.

Following spells of wet weather, we often hear of nocturnal activity in the roof space keeping people awake: these noises usually come from rats and mice looking for cosy dry beds and ceiling goodies to gnaw on.  Alas, many insulation products provide just the sort of welcoming environment our rodent friends love.

The best insulation for controlling the crawlies is pump-in insulation which contains the additive borax to discourage nesting.

However many people don’t like the idea of loose insulation because of dust and the possibility of the pump-in material moving and thereby reducing its energy efficiency. What’s the solution?

The Answer is Woolcell, 20% wool home insulation

Woolcell is a wool-based natural active fibre, semi-bound insulation product. Developed in Western Australia, Woolcell binds the cellulose fibres together, keeping the product’s “loft” over the lifetime of the home, minimising movement and sagging over time.

With its inherent suitability for insulation (that is what it does on the sheep’s back after all!), wool home insulation helps the product breathe, minimising moisture and reducing mould and mildew.

Woolcell contains approximately 20% wool, combined with recycled newspaper containing added natural salts Borax and Boric acid to make it fire and vermin resistant.

Woolcell home insulation was even awarded a National Wool Invention Competition ‘Prize of Distinction’ and is CSIRO-tested for conformance to industry standards.

A Thing of Beauty

Wool stands out from other natural fibres.

It breathes and traps large columns of air that provide high resistance to heat flow, giving higher thermal and acoustic ratings over other insulators.

Wool home insulation is environmentally sustainable and consumes a very small number of processes and energy during production (it’s embodied energy).

No wonder it continues to be one of 4 Seasons’ biggest sellers.

Finally, Woolcell insulation does exactly what’s it meant to do: insulate your property in summer, winter and every time in between to efficiently manage your energy consumption for heating and cooling.  So not only will you have safe, properly-installed insulation, you’ll have peace of mind and less hard-earned money flying out of your bank account.  Read about more the benefits of roof insulation.

The only complaints will come from the rats.