Take a look at the charts below to see the difference between think pink aerolite and isotherm ceiling insulation R-values. People often ask the question “aerolite vs isotherm”. The R-values of the product is very important, it measures the heat flow through the product and how effectively the product with work for you.

Read more on 135mm Aerolite | 100mm Aerolite | 75mm Aerolite | 50mm Aerolite

 Think Pink Aerolite R-value Thickness Table


Thickness (mm)R-valueLength (mm)Width (mm)Climatic Zones
100mm2.50800012003 & 5
135mm3.38500012001 & 4 & 6


Isotherm Insulation R-value Thickness Table


Thickness (mm)R-valueLength (mm)Width (mm)Climatic Zones
40mm0.8210000750 / 1200-
50mm1.0210000750 / 1200-
75mm1.538000750 / 1200-
100mm2.336000750 / 12003 & 5
135mm3.145000750 / 12002 & 6
145mm3.375000750 / 12001 & 4



The Technical Information on R-values


R-value – or more commonly known as Thermal Resistance is an indication of the performance of the product.  A higher R-value will mean a better insulating effect the insulation will have.

  • R-value = Thickness of the material
  • K-value= Its Thermal Conductivity

The K-value is determined in an accredited laboratory and the thickness of the product is determined by the manufacturer.

A sample of the product will be produced by the manufacturer at a stated density (weight) and will be sent to the laboratory for testing. What needs to be achieved here, is a low K-value (thermal conductivity). The product needs to be a bad conductor of heat flow.

Once the results come back for the k-value, the R-value can measure effectively, example:

A 50mm blanket that has a tested K-value of 0.046:

Thickness 0.05/ K-value 0.046 = 1.08 R-value

As long as the same thickness is used by the manufacturer in his range at the same density as the submitted sample, he can use the same K-value and formula to determine the R-values.

A 100mm blanket example:

Thickness 0.1 / Tested K-value 0.046 = R-value 2.17

The determined R-value’s in the above examples are the product R-value. Remember that the ceiling and roof tiles, as well as other roofing materials, also have a small insulating effect. So the total R-value of both the insulation materials and the roofing materials must be considered. If you have a 2.17 R-value from the insulation material, and a 0.53 R-value from the roofing materials, you get a total R-value of 2.7.

Visit (TIASA) for more info Total R-values.