Frequently Asked Questions

Individual fibres are impregnated with a water repellent. When installed, the space between the fibres is too small for water droplets to fit between, and because the surface of the fibres repel water, droplets cannot be drawn through by capillary forces.

This insulation does not contain any nutrients and will not attract or sustain termites. Like an empty cavity, it cannot stop termites entering the home.

Yes. Electricians find it easy to push through the fibres using a sharp ended “snake”. In fact, some prefer to install their cabling after installation.

Yes. As part of the installation process the technician will ensure that the space behind vents is kept clear to allow for the required flow.

No. Holes are 18-26mm in diameter, spaced approximately 900mm apart, and a specialist four-point masonry bit cuts rather than hammers the bricks.

Every care is taken to ensure that this does not happen. Before starting, the technician inspects the wall to determine where plumbing, electrical and other services are located.

No. The insulation is installed to a nominal density of 40kg/m3. This ensures the correct performance once installed – and that the fibres interlink to create a seamless insulation layer that will remain intact if bricks are moved to access a pipe leak or the like.

The ComfortWall warranty is probably better than a new home warranty because it warrants the performance that will be achieved – not just the materials that have been used.

Double glazing and ComfortWall both improve insulation performance. However, glazing can also let radiant energy (direct sunlight) into the home, depending on the glass area, type, direction, and shading.

Research suggests the following: when the area of glazing is greater than 20% of the floor area – it is better to improve window performance, and when it is less than 20% it is better to improve wall performance.

However, in improving one, it highlights the weakness of the other so choosing both is likely to give a better comfort and cost benefit outcome.

Windows are the weakest part of the wall, so upgrading their acoustic performance is likely to give the greatest gain. However, just like water leaks through cracks, noise also leaks through gaps around windows and at the top of a cavity wall. ComfortWall fills these gaps and absorbs the sound.

House Energy Rating Software (HERS) is used to measure the star rating of new homes – that is, how much energy is used to keep the home comfortable. The higher the star rating, the lower the energy used.

ROCKWOOL stone wool is non-combustible. Therefore, it can be used in walls in the highest risk BAL FZ bushfire zones.

ROCKWOOL cavity wall insulation is rated for use in cavity walls up to 25m in height without any risk of slumping or settlement. This means it will not need to be replaced or topped up for the life of the home.

The World Health Organisation has classified the carcinogenicity risk of stone wool as Group 3 – the same as chlorinated drinking water.

Stone wool does not contain asbestos, it is made from natural basalt rock.

ComfortWall keeps the home warmer in the winter and cooler in the summer – whilst also keeping the wall drier – reducing the risk of dampness and mould. Also, ComfortWall does not contain harmful fire-retardant chemicals. Combined, this provides asthma and allergy sufferers with a healthy indoor environment.