2 December 2025
Building users, from homeowners and tenants to teachers and pupils, and the wider workforce, are more aware than ever of how sound impacts health and wellbeing. When creating new developments, schools or places of work, we therefore have a duty of care to ensure these buildings not only meet the regulatory requirements but push to exceed them. Martin Hamer, Associate Acoustic Consultant at MEC Consulting Group outlines key considerations for developers…
Building acoustics is the science of calculating and controlling how sound travels within and between adjoining buildings, floors and rooms. Essentially, it’s about creating spaces that work for their intended use and are comfortable, functional, and private.
For house builders, it means homes where residents can relax and sleep without disturbance from neighbouring dwellings. In healthcare, it ensures areas are fit for purpose, whether that’s maintaining confidentiality in a consultation room or providing a calm environment for recovery. In education, it means classrooms with controlled ambient noise, so children can focus without distractions from inside or outside.
The type of project determines what regulations to follow, so for residential schemes (new builds and conversions) it’s typically Approved Document E; for schools it’s BB93, and for healthcare, HTM 08.
Common Challenges
From an acoustic perspective, the most challenges tend to arise in the transition from design to construction. As a less tangible element, acoustics are sometimes treated as an afterthought rather than a core part of the build. This can lead to assessments being carried out too late, when changes are harder and more costly to implement.
Common issues include junctions not being sealed correctly, using materials not specified within the acoustic detail, and products being substituted against the recommendations of the acoustician.
Poor coordination between trades can also cause problems. We’ve seen cases where plumbers, electricians, or other trades have unknowingly penetrated acoustic partitions, or installed services in places that compromise acoustic performance. It’s rarely deliberate; often it’s simply because the implications haven’t been explained. Add in workmanship issues such as debris left in twin stud walls, overlooking flanking transmission routes, or stud walls being moved or redesigned against the acoustic plan, and the result can be a building that falls short of both regulation and user expectations.
Most of these challenges can be avoided through early and clear communication. Bringing all trades together at the design stage ensures everyone understands the acoustic requirements and where services such as electrics and plumbing will be routed. Similarly, early engagement with your acoustician is essential. Appointing an acoustician from around RIBA Stage 2 means the design can be optimised from the start, avoiding costly redesigns or, worse, having to correct a partially built section on site. It also significantly reduces the risk of failures and the need for remedial work.
Material Implications
Choice of material is one of the biggest factors in achieving desired acoustic performance. Size, depth, mass and density need to meet specific requirements to ensure the acoustics suit the space being built. There’s no ‘one size fits all’ approach and requirements will vary from project to project, in particular when converting existing buildings. For example, lightweight timber frame systems require very different detailing to concrete or steel frame builds.
Installation is equally important. Materials should be installed following the manufacturer’s guidance, so they perform as intended. Even small changes can have a significant impact on acoustic performance, so my earlier point about clear communication with trades is worth reiterating!
Ongoing Compliance
To ensure the original design intent is maintained throughout construction, developers are advised to book regular site inspections with their acoustician. While these can’t guarantee a project will be entirely hassle-free, as different parts of the build progress at different times, they are one of the most effective ways to spot and address potential problems early.
Site inspections are recommended at first fix, second fix, and towards the end of the build. These stages are when the most common issues can be caught: debris left in stud walls, studs built in the wrong place, non-compliant materials, incorrect installation, or even small but important details like plug socket positioning. Identifying and resolving these before walls and finishes are closed up is far easier, cheaper, and less disruptive than having to undo completed work.
Photography is another valuable tool for evidencing compliance. It shows that critical acoustic details were installed correctly and in line with the original specification before they were concealed. This record can be invaluable for sign-off and reducing the risk of test failure if the build meets the approved design. If failure does occur, photography also helps to identify issues before any invasive work takes place.
Cross-Discipline Collaboration
One final word of advice is to consider where acoustics overlaps with other services and when specialists can collaborate. For example, building acoustics and environmental noise assessments go hand in hand. While building acoustics focuses on controlling how sound travels within and between properties, a noise assessment ensures the development is protected from external sources such as road traffic or nearby industry.
Assessing these concurrently ensures a holistic approach. It means a home is quiet and comfortable inside, its garden/outdoor space can be enjoyed, and overall sound levels remain within acceptable limits.
Similarly, a structural consultant could also be appointed at the same time as an acoustician, meaning floors, walls, and other key elements can be designed to meet both load bearing and sound insulation requirements.
Allowing for detailed collaboration at the earliest stage would help developers deliver homes, schools and places of work that perform acoustically well in every aspect.
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