Sound Insulation Testing
Sound insulation testing—also known as pre-completion testing—is a legal requirement for most new-build and converted residential properties under Building Regulations Approved Document E. These tests assess how well separating walls and floors reduce the transmission of sound between dwellings, ensuring that residents enjoy privacy and comfort.
Both Airborne and Impact sound tests may be required depending on the type of property and construction. Airborne tests apply to walls and floors, while impact tests apply only to separating floors.
Meeting the Standards
To pass, properties must meet minimum acoustic performance values:
- New Builds:
- Airborne (DnTw+Ctr): ≥ 45dB
- Impact (LnTw): ≤ 62dB
- Conversions:
- Airborne (DnTw+Ctr): ≥ 43dB
- Impact (LnTw): ≤ 64dB
Specialist residential spaces may be subject to additional or different requirements.
Why Choose Us?
At Building Efficiency Testing Ltd, we guarantee:
- Fully Compliant Testing in accordance with ISO 140-4 and ISO 140-7 standards
- Certified Engineers, registered with SITMA
- UKAS-Calibrated Equipment for precise and reliable results
- Fast Turnaround on reports and certification
- Supportive, Expert Advice throughout your project
We deliver accurate, efficient testing with minimal disruption to your schedule. Whether you’re developing flats, converting offices, or building a hotel, our team ensures you meet your regulatory obligations smoothly.
When Should Testing Be Done?
We recommend testing at the earliest suitable stage—preferably before kitchens or bathrooms are installed. To ensure accurate results, the following conditions must be met:
- Doors, windows, and seals must be fully fitted and functional
- All plastering and finishes should be complete
- Electrical fittings installed and working
- All penetrations and service gaps sealed
- 240V power available in all rooms
- Full access to all relevant areas of the building
Meeting these criteria helps avoid failed tests and costly rework.
Do You Need Sound Insulation Testing?
You will need testing if your project involves:
- New-build blocks of flats or apartments
- Terraced or semi-detached houses
- Hotels, hostels, or HMOs
- Conversions of existing buildings into residential units
You do not need testing for:
- Detached houses
- General refurbishment projects (not involving new separations between dwellings)