This article will respond to queries about Knauf vs Aerolite. Both are high-quality products. Depending on your situation and preference, one might suit you better over the other.

The two products are also known as fibreglass insulation since they are made from recycled glass and sand. Aerolite is pink in colour while Knauf earthwool is brown. There is no efficiency or durability connotation in an insulation materials colour.

There are four seasons in a year in South Africa. During winter and summer, extreme temperatures are experienced. Glasswool insulation products can shield you from cold during the winter and heat during summer.

Both Knauf and aerolite can be installed without having to use blowing machines. Additionally, there is no risk of asbestosis or cancer due to contamination from asbestos, which assures a healthy environment for your family.

When homeowners decide to install thermal barriers on their own, certain mistakes are bound to happen. One of the most common mistakes is leaving of gaps between the beams. This will decrease the thermal performance of the material. Hire a professional for the correct installation of fibreglass insulation barriers.


Knauf is more popular when compared to aerolite in South Africa. This is because of the following reasons:

  • A higher density of 12kg increasing sound absorption
  • Smaller softer fibres
  • Much less itchy to work with
  • ECOSE Technology with no chemicals in the binder
  • Contains no Formaldehyde
  • Contains no Phenols
  • Highest quality insulation product in SA
  • EURO approved. Highest standards.
  • EUROFINS Gold Certificate for indoor air comfort


The R-value measures the efficiency of insulation material. The R-value printed on an insulation product’s package regardless of the manufacturer and type means a similar level of thermal protection. It is essential to consult an expert in the industry when you are not sure about the right R-value for your area’s climate.

  • 135mm Knauf    – R-value – 3.38 (excluding roofing materials)
  • 135mm Aerolite – R-value – 3.38 (excluding roofing materials)

Thermally they perform equally. It depends on your preference and budget. Both these products perform very well is residential, commercial and industrial buildings.


The density of an insulation product helps with noise dampening and soundproofing. The higher the product’s density, the more effective the noise dampening will be. Knauf slightly out preforms Aerolite with soundproofing ability.

  • 135mm Knauf – Density    – 12kg
  • 135mm Aerolite – Density – 11.5kg


Traditional ceiling insulation materials like aerolite were known to be a bit smelly. The smell increased with the ageing of the insulation material combined the presence of vermin.

Knauf asserts that Earthwool makes for the best insulation material since it has no smell. Unlike aerolite where it can be detected in confined spaces. This is because of the binders that are used in the product.

In the future, we will probably see an increased number of insulation products claiming not to have an odour. Earthwool is the best choice for your home if you prefer an odourless insulation material.