100mm Acoustic Mineral Wool Slabs – StudioCore 45 (45kg/m³) | Sound Insulation for Walls, Floors & Ceilings

True acoustic infill engineered for predictable airborne sound absorption in framed constructions.

These 100 mm Acoustic Mineral Wool Slabs are purpose-designed for sound control within stud walls, intermediate floors, and suspended ceilings, where reducing speech, TV, music, and general airborne noise is critical.

Unlike generic mineral wool products developed primarily for thermal insulation, these slabs are acoustically optimised by design. A carefully controlled 45 kg/m³ density combined with an open fibre structure allows sound energy to be absorbed efficiently across key residential and commercial frequency ranges.

At a full 100 mm thickness, they deliver substantially improved low- and mid-frequency absorption, making them suitable for serious soundproofing projects where thinner slabs underperform.

This is true acoustic infill, designed to work as part of a complete soundproofing system — not a repurposed thermal product.

Why These Acoustic Slabs Deliver Better Real-World Results

Acoustic-Optimised Density (≈45 kg/m³)

Engineered specifically for airborne sound absorption, not heat retention.
This density provides the optimal balance between fibre interaction and air movement, delivering reliable, repeatable acoustic performance inside wall and floor cavities.

Full 100 mm Depth for Deeper Absorption

The increased thickness significantly improves low- and mid-frequency control — the frequencies responsible for most neighbour and room-to-room noise complaints.

Open Fibre Structure

The engineered fibre matrix converts airborne sound energy into heat through friction, reducing noise transfer and internal reverberation far more effectively than rigid, thermally focused slabs.

Stable Friction Fit – No Slumping

Designed to friction-fit securely between studs and joists, maintaining full cavity contact over time and preventing performance-killing air gaps.

Predictable System Performance

Optimised to work alongside:

• Double plasterboard systems

• Resilient bars or acoustic hangers

• Acoustic membranes and sealants

This ensures consistent results when installed as part of a correctly detailed soundproofing build-up.

Typical Applications

• Stud wall soundproofing (timber or metal)

• Intermediate floors between habitable rooms

• Ceilings beneath noisy spaces

• Home cinemas and media rooms

• Bedrooms, offices, and home studios

• Residential and light-commercial acoustic upgrades

• New-build and refurbishment projects requiring Part E support

Acoustic vs Generic Mineral Wool (Important Distinction)

These slabs are not generic insulation repurposed for sound.

They are engineered specifically for sound absorption within cavities, prioritising:

• Acoustic interaction over thermal conductivity

• Fibre openness over rigidity

• Performance consistency over multi-use compromise

This makes them the correct choice where sound control is the primary objective, rather than a secondary benefit.

Fire & Regulatory Confidence

• Non-combustible mineral wool construction

• Euroclass A1 fire rating

• Suitable for use in Part E compliant wall and floor systems

• Commonly accepted in residential and commercial acoustic specifications

Fire safety is fully maintained without sacrificing acoustic performance.

Technical Specification

• Thickness: 100 mm

• Pack coverage: 2.88 m²

• Density: 45 kg/m³ (acoustic-optimised)

• Material: Mineral wool (sound-absorbing grade)

• Fire rating: Euroclass A1

• Thermal conductivity: λ ≈ 0.034–0.036 W/mK

• Primary function: Airborne sound absorption (cavity infill)

Installation Guidance (Professional Friendly)

• Cut cleanly with an insulation knife or saw

• Cut slabs slightly oversize for friction fit at 400 mm or 600 mm centres

• Ensure full cavity fill with no compression or gaps

• No mechanical fixings required

• Always seal perimeter gaps and junctions for best results

• Use gloves and protective clothing when handling mineral fibres

For maximum performance, combine with resilient systems and mass layers.

Who This Product Is For

✔ Buyers who want real sound reduction, not marketing claims
✔ Installers seeking predictable, repeatable results
✔ Projects where noise control matters more than heat loss
✔ Customers frustrated with “acoustic” products that behave like thermal wool

Bottom Line

If your priority is controlling noise, not just filling space, these 100 mm Acoustic Mineral Wool Slabs deliver measurably better real-world acoustic performance than generic insulation alternatives.

This is the correct material for serious soundproofing work.

⭐ Customer Reviews

Rated 4.9 / 5 by customers

★★★★★ “Noticeable reduction in voice transfer once the walls were boarded.”
★★★★★ “Dense, clean-cut slabs that fit perfectly between studs.”
★★★★★ “Clearly designed for acoustics, not just thermal insulation.”
★★★★★ “Used in a ceiling system and saw a real improvement in noise from above.”
★★★★★ “Professional quality and consistent across every pack.”

Need Help Specifying a Complete System?

Our acoustic specialists can help you design a fully optimised soundproofing solution for walls, floors, or ceilings — ensuring meaningful real-world noise reduction, not guesswork.