Rockwool Acoustic Mineral Wool RW5 100mm 100kg/m³

Rockwool Acoustic Mineral Wool (RW5) (100kg per m3)100mm is our highest density acoustic mineral wool that is used to treat cavities, between flooring joists, stud-frame walls and battened ceilings.

Acoustic Mineral Wool works by lessening sound energy helping to decrease the remaining noise ‘bouncing’ around inside the cavity and amplifying (like a drum). We recommend using Rockwool RW5 as part of a system or to reduce Flanking transmission.

Bass frequency absorption

Bass frequencies are difficult to treat with soundproofing. Rockwool RW5 has a good absorption coefficient at bass frequencies, making it an essential upgrade to most soundproofing systems.

Studio Soundproofing

As a denser product Rockwool RW5 lends itself to higher-end acoustic systems like soundproofing a studio or soundproofing a cinema. It can also be used to increase the performance of everyday soundproofing systems.

Easy to cut

For clean cuts, keep your mineral wool in its wrapping and make two even cuts with a serrated knife or saw. this will leave you with three sets of 400mm slabs. Don’t forget to wear PPE!

Easy to install

Cut your slabs slightly larger than the application area and simply pressure fit them to hold them in place.

A1 fire rated

Rockwool RW5 has a Euroclass A1 fire rating, meaning it is completely non-combustible. This is an excellent safety feature and is often required for building regulations.

Thermal insulation

Alongside its enhanced acoustic capability acoustic mineral wool carries the same thermal insulation properties as its standard counterpart. Rockwool RW5 has a thermal conductivity of 34 W/mK.

Although acoustic insulation used here is not toxic or hazardous, when installing mineral wool does release small dust particles, so do use gloves, goggles and a face mask.
Measure the depth of the cavity first, or if you know the stud depth you are using, make sure that you choose a depth of Acoustic Mineral Wool that allows for a 10mm air gap on either side.
The reason you leave this air gap is to avoid compressing the fibrous properties between the two partitions you are soundproofing, for example, do not use a 100mm depth in a 50mm gap.
Acoustic Mineral Wool is easy to cut with large scissors, or we found a bread knife to be a great tool here.
Cut the slab a little larger than the stud or joist gap to friction hold, or use a form of wiring to hold it in place.

Soundproof plasterboard works best as part of a system like our MuteClip systems, or when combined with other materials.

60kg is the density of the product when measured in cubic meters and not the weight of a single slab or bale of acoustic mineral wool – it is a reasonably lightweight sound insulation product that is easy to cut and easy to lay, use gloves and eye protection and keep the area ventilated during and after installation.

The slab mineral wool is much higher density and far better for airborne sound absorption and reduction, especially at base frequencies.

Yes, the 60kg/m2 mineral wool has a thermal conductivity of 0.034 W/mK.

The insulation boards improve the thermal rating but do not absorb sound within a cavity so the mineral wool will improve both thermal and acoustic!

100mm is the thickest slab of acoustic mineral wool available and is best used as stud wall insulation, between flooring joists or flooring frameworks with our MuteCradle options to prevent cavities from resonating, leaving them untreated will lead to any remaining sound passing through into these areas. You will also want to avoid using a thicker size than the air gap provided and aim to have at least a 10mm air gap on either side. Using a 100mm thickness in a 50mm cavity, for example, will lead to compression of the acoustic mineral wool and a direct path of sound to travel through which will result in degrading the acoustic performance.

You will want to install acoustic mineral wool in timber and metal frameworks, in our suspended ceiling or wall systems such as in our MuteClip System and flooring cavities between joists or with our MuteCradle options it can be used to treat all these cavities to reduce sound from bouncing around inside them and resonating. But, it is essential to note that this is a lightweight, fibrous material and this means that sound will pass through it – so it is not effective in reducing airborne nor impact noise issues as a standalone solution.

As a fibrous material, it can lead to slight irritation of the skin, those with sensitive skin may find a slight redness appear while handling it – the use of gloves and protective eyewear is recommended.

Find out more information about Rockwool Acoustic Mineral Wool by downloading the guide below.

Product Data Sheet

If you are looking to specify this product for a build, please refer to our downloads tab for technical product or systems information.

Technical Support
Should you require further technical assistance in specifying our products, please contact us.

BIM Objects
iKoustic also supply a selection of BIM objects via our NBS profile, which can be found here.

Shop by Partition

Ceiling Soundproofing

Best Sellers

MuteClip

Tecsound

Soundproof Underlay

Soundproof Panels

Nationwide Delivery

Bulk Discounts

Price Match Promise

Support & Advice

Rockwool Acoustic Mineral Wool RW5 100mm 100kg/m³