Soundproofing & Acoustic Investigations

The customer was experiencing significant airborne and impact noise transmission through the existing timber floors across multiple rooms — voices, music and footsteps from rooms above and adjacent were clearly audible, affecting day-to-day comfort. One bedroom in particular needed both floor AND wall acoustic upgrades.

On-site assessment of the existing floor and wall build-ups in every affected room, followed by a four-stage acoustic floor upgrade per room (lift existing finishes → mineral wool between joists → resilient acoustic bars → new floorboards → acoustic underlay → new carpet) plus a designed acoustic wall upgrade to the most-affected bedroom.

The existing floors offered no acoustic insulation between joists and no decoupling between the upper finish and the joists. Sound was transmitting directly through the structure as both airborne and impact noise. The most-affected bedroom additionally had a direct flanking path through the party wall requiring an independent acoustic wall layer.

Per room — Stage 1: existing floor finishes removed. Stage 2: RW5 acoustic mineral wool installed between joists. Stage 3: resilient acoustic bars fixed across the joists to decouple the new deck. Stage 4: new floorboards laid, acoustic underlay over, new carpet finished. Additional wall upgrade in one bedroom using independent stud + mineral wool + acoustic plasterboard to break the flanking path.

Measurably quieter rooms across the home with significant reductions in both airborne noise (voices, TV) and impact noise (footsteps). Customer rated the service 10/10 on Checkatrade and confirmed they will be using RetrofitIQ again for further works.

The customer needed the existing finished floor lifted so that proper insulation could be installed between the joists — to reduce heat loss into the cold void below and improve airborne and impact noise transmission from the room below.

On-site assessment of the existing suspended-timber floor and the void beneath, followed by a four-stage underfloor build-up: lift existing floor → install mineral wool insulation between joists → fix resilient acoustic bars across the joists → lay new moisture-resistant acoustic boards (RW5 system) as the new deck.

The existing floor build-up offered virtually no thermal or acoustic insulation: heat was being lost downward into the void, and sound was transmitting directly through the joists as both airborne and impact noise. The joists themselves were sound and reusable, so the optimal solution was an insulated, decoupled new deck rather than a full replacement.

Lifted the existing floor and exposed the joists; installed mineral wool insulation between the joists (thermal + acoustic); fixed resilient acoustic bars across the joists to decouple the new deck from the structure; finished with moisture-resistant acoustic boards (RW5 system) ready for the floor finish. Every stage was photographed for the client's records.

A warmer, measurably quieter room with a clean, fully-documented build-up. The client confirmed they would happily reuse RetrofitIQ for similar works or general construction — verified in his Checkatrade review.