- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 11 Nov 2020
The term ‘separating floor’ is generally used to describe a floor designed to restrict the passage of sound between the spaces above and below. It is most commonly used in relation to residential buildings. In this context, a ‘separating wall’ is one that separates adjoining residential rooms or properties.
Construction clients may have particular acoustic requirements that should be recorded in the project brief, however, the legal requirement for building construction to resist the passage of sound is set out in part E of the building regulations, which describes requirements for:
- Dwelling-houses, flats and rooms for residential purposes.
- The common internal parts of buildings containing flats or rooms for residential purposes which give access to the flat or room.
The requirements of part E of the building regulations can be satisfied by following the guidance in Approved Document E: Resistance to the passage of sound.
Whilst not exhaustive, approved document E describes types of separating floor as:
- Floor type 1: Concrete base with ceiling and soft floor covering.
- Floor type 2: Concrete base with ceiling and floating floor.
- Floor type 2: Floating floor.
- Floor type 3: Timber frame base with ceiling and platform floor.
Three ceiling types are also described:
- A: Independent ceiling with absorbent material.
- B: Plasterboard on proprietary resilient bars with absorbent material.
- C: Plasterboard on timber battens or proprietary resilient channels with absorbent material.
Critical to the success of each construction, is the detailing of junctions between the floor and other elements such as walls and floor penetrations. Common junction details are illustrated in the approved document, as are performance standards and pre-completion testing requirements.
 Related articles on Designing Buildings Wiki
Featured articles and news
Declaration prioritising sustainable urbanisation adopted.
Some brief words about the actuator.
After 34 years at the Institute.
To support the next generation of engineers.
CIAT reporting from the Competition and Markets Authority.
Making sustainable construction number one priority.
Interview with ECA CEO.
Many provisions came into force on June 28, 2022.
With room to expand.
Refurbishment, Energy Efficiency, Indoor air and process.
Why building acoustic considerations must be non-negotiable.
Aluminium Composite Panels (ACP) is one example.
Inventors and innovators at ICE.
Life, death and art at the Stuart court. Book review.
Real estate, place adaptation and innovation.
Review and comment on the revised draft before July 11.
Write about something you know, help us build and grow !
A blended event and triumphant return.
Mark Reynolds succeeds Andy Mitchell as Co-Chair of CLC
Designing Buildings is 10 years old.
From alteration to deconstruction on DB.
Changes come into force for F,L,O and S.