Acoustisorb is manufactured from recycled polyster, Acoustisorb provides excellent thermal and acoustic insulation properties. It can be used in domestic, commercial and industrial buildings, such as airports, factories and schools, to reduce noise and maintain thermal comfort all-year-round.Does not contribute to flame spread and is SANS428 approved.


  • Suitable for domestic, industrial and commercial ceilings and cavity walls.
  • Offers excellent acoustic and thermal performance in one product.
  • Prevents roof drumming noise from rain, hail, wind, traffic etc.
  • Performs excellently in high humidity areas.
  • Non-irritant, non-toxic and non-allergenic.
  • 100% recyclable
  • Complies with SANS 428 fire standards and does not contribute to flame spread.
  • The fibre does not absorb water or support fungal growth.
  • The products properties prevent it from losing loft. The polyester fibre acts like a spring, therefore the fibre cannot subside more than 10%.


  • Schools, churches, airports, trainstations, recording studios, board rooms, restaurants, etc.
  • Any application where noise reduction is required and on roofs where prevention of drumming noise is required.

How does Acoustisorb work?

During the summer months, Acoustisorb, when laid horizontally as a ceiling or over purlin will reduce the downward heat flow entering by trapping the heat in the fibre. It works the same in winter by preventing the heat from leaving a building. The product retards heat flow, or slows down heat flow through the product. An important factor is thermal lag. Thermal lag means that after approximately 72 hours the heat on the one side of the product will be the same on the other. Therefore it is important to adequately ventilate the building as it will improve the performance of the product! With regards to the acoustic properties, owing to the density of the board and fibre and the softness of the material, any sound waves that approach the products behave in this manner:

  • Some of the sound is absorbed into the product and dispersed.
  • Some is deflected into other directions, thereby dispersing the sound and reducing its energy.
  • When pushed up against roof sheets, the products reduce the vibration on the roof sheeting; this means it reduces the energy and the noise that will pass through the product.

Acoustisorb Fibre

Thickness Density Width (M) Length (M) R-Value
25 mm 50 kg/m³ 1.2 m 20 m 0.74
35 mm 50 kg/m³ 1.2 m 10 m 1.48
50 mm 50 kg/m³ 1.2 m 10 m 1.48

Test reports

  • FTC08-033a, B1,B2, non-corrosive
  • Improves acoustics for a better working environment.
  • Saves on energy bill by reducing heat losses and air-conditioning energy.

Frequently Asked Questions

Yes, 70% of your heat entering a building comes through the roof, and during the winter months, more than 60% of your heat loss is through your roof.

Residential applications: it assists with preventing rain, wind and hail noise from entering through the roof sheets. It also prevents noise from passing between rooms. It can also prevent noise through wooden floors.

Schools, Community Centers, Restaurants, Airports: It is very important to prevent noise passing through the roof, as the noise will affect the teaching etc. The sound that is generated in the buildings needs to be absorbed to ensure that the space is comfortable, if this is not the case you get people that will not concentrate, headaches can develop etc.

If not, why not?

If yes, what type?

Foil is not enough in isolation, it should really only be used as a vapour barrier, although it does add slightly to insulation of the building.

Thermal values of foils are only measured in R-Values. The test requires a 25mm air gap on either side of the foil. When a foil is installed on site, using a standard over purlin installation, there is no air gap and therefore the insulation value is negligible. If a foil is fixed to the rafters, below the purlins, to allow for the air gap, you will still require a vapour barrier, it will therefore be more effective to use a fiber or insulated ceiling board.

Prevents heat from entering and leaving the building, thereby moderating (keep constant) temperatures in the building. Saves Electricity, NERSA has approved the following increase in April each year, 2010 24,8%, 2011 25,8% and 2011 25,9%.

Depending on which insulation product you use, it will pay for itself between one to eight years i.e. insulated ceilings, take off the cost off normal installed ceilings and you are left with a small portion to pay off on energy savings.

It is cheaper to install insulation when constructing the building than doing it afterwards, as our products can be used as skimmed ceilings or you can use insulated bricks.

Good insulation adds a minor percentage to the building cost.

Insulation saves energy by moderating temperature in your building, which saves money on heating and cooling costs.

Makes life more pleasant and bearable.

Enables better concentration and focus.

Insulation reduces condensation in buildings, which makes them more pleasant and healthy.

Insulation products save the environment by saving energy and therefore carbon and oil.

If you are using Green products, it saves natural resources as the product is manufactured from recycled materials.

The green star rating also encompasses energy efficiency, manufacture area, if the product can easily be recycled, gases etc.

What type of roof structure have you got on your building?

Important points about the roof structures are:

  • Sheets
  • Need to prevent condensation i.e. foil
  • Need to prevent noise from rain, wind and hail i.e Acoustisorb over purlin
  • Need to insulate, can be used on top of the ceiling (Youngtherm or Acoustisorb)
  • Tiles
  • Need good underlay
  • Can be used on top of ceiling or as ceiling
  • Concrete Deck
  • Insulating concrete deck using InnoFilla or IsoBoard

Insulation Installation Options:

  • Over Purlin
  • Top Hat
  • Suspended Ceilings
  • Ceilings
  • Floors
  • Walls
  • In a mechanical spacer system.