Acoustic Insulation Applications and Product Guide

Acoustic insulation is essential for controlling noise in commercial, industrial and residential buildings. Properly specified materials address airborne and impact sound, improve occupant comfort and ensure compliance with Part E of the Building Regulations. Left unchecked, excessive noise can impair productivity, disturb patients, reduce speech intelligibility and even affect health and well-being.

Key Applications

Partition Walls and Stud Walls

Reduces airborne sound transfer between rooms
Applied within timber stud frameworks or metal channels
Ideal for offices, healthcare facilities, schools and multi-occupancy residences

Floors and Suspended Ceilings

Mitigates impact noise (footsteps, machinery) and airborne noise from above
Installed under floor finishes (screeds, floating floors) or above ceilings
Common in apartment blocks, gyms, plant rooms

Soil Stack and Service Pipework

Dampens water hammer, flushing and mechanical noise
Wraps and clamps maintain acoustic performance without compromising access
Required in restaurants, hospitals and office blocks

Plant Rooms and Ductwork

Controls fan, pump and HVAC noise
Lined duct interiors or externally wrapped ductwork
Enhances machine-room vs. occupied-space separation

Product Selection

All products supplied or specified via www.insulationandlagging.co.uk.

Specification Considerations

Density & Mass: Heavier materials (Muftilag R51, Prime Flexilag) deliver superior sound-blocking (high Sound Reduction Index).
Absorption vs. Barrier: Rolls and slabs (Knauf Acoustic Roll, APR Rolls) absorb reverberation; composite sheets and heavy barriers block sound transmission.
Sealing & Decoupling: NS Putty Pads and acoustic sealants ensure airtight joints. Decoupled frames and resilient clips further isolate structure-borne vibration.
Fire & Vapour Control: Many products incorporate foil facings (Bostik W110, NS Putty Pads) to provide Class O vapour barriers and meet fire-safety regulations.

Installation Best Practices

Install insulation snugly without gaps or compression to maintain manufacturer-stated acoustic performance.
Always seal perimeter and service penetrations with acoustic putty pads or sealant.
For pipework and ductwork, wrap with Flexilag or Bostik W110, overlapping joints and sealing with foil tape.
Verify finished wall and floor constructions against Part E performance tables during design.

Compliance and Performance

Compliance with Part E (England & Wales), Section 5 (Scotland) or Part G (Northern Ireland).
Acoustic designers should reference Building Bulletin 93 (BB93) for schools and HTM 08-01 for healthcare.
Performance targets typically range:
Airborne sound insulation: DnT,w ≥ 45–60 dB
Impact sound insulation: L’nT,w ≤ 62–75 dB

For further technical details, NBS clauses or BIM objects, please contact our technical sales team.