Shop by R values

R Value of Materials

The R-value is a measure of thermal resistance used for insulation materials. The higher the insulation R-value the better the thermal performance and the slower the heat loss or gains. Investing in a higher value can help to reduce energy wastage.

Resistance to Heat Flow

A typical Australian home has 70mm or 90mm wall studs. The highest rated residential product to fit a 90mm spacing is an R2.7 wall batt. Common R-values for walls include R1.5, R2.0 and R2.5 insulation.

Reduce Heat Loses

Local climate and budget are two factors which help determine what products are best for your home. Roof insulation R-value ranges from R2.5 to R7.0 and are between 120mm and 290mm thick.


Shop by R-Value at Pricewise Insulation

The insulation batt ratings or "R-ratings" will also depend on your own preferences and budget. Insulation with a higher R-Value will generally cost more than insulation with a lower rating. Much of this is due to the fact that a higher rating requires more insulation material, and this will naturally attract a higher cost. An un-insulated house will benefit greatly from even a small layer of thermal ceiling insulation being installed. There is a point at which adding more of even the best insulation material will no longer have a noticeable impact on energy usage or indoor temperature. In many areas of Australia, this is will be somewhere between the R5.0 and R6.0 range. If you already have e.g. an R6.0 insulation installed in the ceiling, then it's recommended that you look at other energy saving alternatives before simply adding another layer of insulation. Contact Us for more advice on selecting an appropriate R-value. Buy R1.0 to R7.0 wall and ceiling insulation online at discounted prices! High quality thermal and acoustic insulation, wide range of R-Value insulation.

Compressing Thermal Insulation – Does it affect Thermal Performance or R-Values?

Often when deciding on insulation, you will run into the problem of having a limited amount of space in which to fit your insulation. For example, very few wall studs are thicker than 90mm, therefore you will be limited to buying and installing insulation that is less than 90mm thick, and it may be tempting to purchase a thicker, higher R-Values insulation and compress it into a smaller space. This is never recommended.

As a general rule, a thicker layer of thermal ‘bulk’ insulation (such as glasswool) will insulate better than a thinner layer of corresponding material. This is clearly demonstrated when comparing the R-Values and corresponding thicknesses of some of the popular Pink Batts ceiling insulation batts, which are all made from different quantities of the same material:

  • R2.5 – 130mm
  • R3.0 – 155mm
  • R3.5 – 175mm
  • R4.0 – 195mm

By this you can see that thicker insulation performs better than thinner insulation so if you choose to install R4.0 insulation in a space only 175mm deep, your R4 will lose some of its insulating effect.

Limited Space? Consider Hi-Density Insulation

Where space becomes a limiting factor, you should consider purchasing Hi-density wall insulation, which allows for higher R-values to be installed in spaces where normally only low R-values would fit. For example, R2.5 ceiling insulation is typically over 125mm thick, but in the acoustic, hi-density variety it is only 90mm thick. The effective soundproofing properties can also add value to the home, by reducing the amount of noise transfer between rooms and between floors.

Don’t hesitate to contact us for advice and a quote on your home insulation project.