What Is Rock Wool Insulation?
A Guide by West Sussex Soundproofing Ltd
Rock wool insulation — also known as mineral wool or stone wool insulation — is one of the most effective and versatile materials used for both soundproofing and thermal insulation in homes and commercial spaces. At West Sussex Soundproofing Ltd, we use high-quality rock wool as part of our soundproofing systems across Brighton, Hove, Worthing, and throughout West Sussex, ensuring maximum noise reduction and energy efficiency.
How Rock Wool Insulation Is Made
Rock wool is manufactured from natural volcanic rock, typically basalt or diabase, which is melted at extremely high temperatures and spun into a fibrous, wool-like texture. These fibres are then bound together to form dense insulation slabs or rolls.
This process creates a durable and fire-resistant product that offers excellent acoustic and thermal performance.
Acoustic Performance
Rock wool is known for its outstanding ability to absorb airborne sound — such as voices, music, or traffic noise — and reduce reverberation within walls, floors, and ceilings.
It’s especially effective in:
- Party wall soundproofing
- Ceilings and floors between flats
- Recording studios and home theatres
- Office and commercial sound control
When used correctly, rock wool can help achieve noise reduction levels of 50–60dB as part of a complete soundproofing system.
Thickness Options
Rock wool insulation comes in a variety of thicknesses depending on the level of sound or thermal performance required:
| Thickness (mm) | Typical Application |
|---|---|
| 25mm – 50mm | Ideal for cavity walls, partitions, and ceiling voids |
| 75mm | Commonly used in stud walls for residential soundproofing |
| 100mm | Excellent for high-performance wall and ceiling insulation |
| 120mm – 150mm | Used for maximum acoustic isolation or thermal retention in professional studios or industrial settings |
Density Options
The density of rock wool insulation plays a major role in how effective it is at absorbing sound and resisting heat transfer. Typical densities include:
| Density (kg/m³) | Performance Use |
|---|---|
| 45–60 kg/m³ | Standard wall and ceiling insulation |
| 80–100 kg/m³ | Enhanced sound absorption and rigidity |
| 120 kg/m³ and above | Professional-grade acoustic applications such as studios and theatres |
Higher density rock wool not only blocks sound more efficiently but also provides better vibration damping and mechanical strength.
Additional Benefits of Rock Wool
- Fire Resistant: Can withstand temperatures of over 1,000°C, providing vital fire protection.
- Water Repellent: Resists moisture and prevents mould or mildew growth.
- Environmentally Friendly: Made from natural rock and recyclable materials.
- Durable: Does not sag, shrink, or lose performance over time.
Rock Wool Installation in West Sussex
At West Sussex Soundproofing Ltd, we use premium-grade rock wool insulation as part of our wall, floor, and ceiling soundproofing systems. Our expert installation teams ensure that the insulation is fitted correctly to eliminate gaps, flanking noise, and vibration paths — giving you lasting results and quieter, more comfortable spaces.
Whether you’re renovating a home, converting a garage into a studio, or improving privacy between rooms, our professional team can help design the right soundproofing solution for your property.
Get in Touch
For professional advice and installation of rock wool insulation in Brighton, Hove, Worthing, Crawley, Chichester, and across West Sussex, contact West Sussex Soundproofing Ltd today.
📞 Call us for a free consultation
🌐 Visit: www.westsussexsoundproofing.co.uk
📧 Email: info@westsussexsoundproofing.co.uk
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