Section 5.1 of the Scottish Building Standards states “Every building must be designed and constructed in such a way that each wall and floor separating one dwelling from another, or one dwelling from another part of the building, or one dwelling from a building other than a dwelling, will limit the transmission of noise to the dwelling to a level that will not threaten the health of the occupants or inconvenience them in the course of normal domestic activities.”
Recommended performance values for separating walls and separating floors are given below. Tests should be performed after construction, using the procedures given in annex 5.C. of the Scottish Standards.
Minimum Values of weighted standardised level difference (DnT,w), as defined in BS EN ISO 717-1: 1997
Maximum values of weighted standardised impact sound pressure level (L'nT,w) as defined in BS EN ISO 717-2: 1997
Standard 5.1 does not apply to: fully detached houses or roofs or walkways with access solely for maintenance, or solely for the use of the residents of the dwelling below.
Performance values are given in terms of two acoustic parameters, one related to airborne sound, the other related to impact sound.
Airborne Sound Insulation
The airborne sound insulation characteristics of a wall or floor are identified by measuring the sound pressure level difference between the source room (the room with the noise source) and the receiving room (to which the noise is transmitted).The larger the difference, the higher the level of airborne sound insulation.
Impact sound insulation
Impact sound insulation is quantified by measuring the sound pressure level in the receiving room, rather than a difference in levels between rooms. Thus, a lower weighted sound pressure level represents a higher level of impact sound insulation.
Section 5 Robust Details
The use of Robust Details to demonstrate compliance with the relevant parts of Section 5 of the Building (Scotland) Regulations is enabled by approvals given under the Scottish Type Approval Scheme. The Scottish Association of Building Standards Managers (SABSM) Scottish Type Approval Scheme (STAS) provides a fast track route to approval through the regulatory procedures for standard buildings, modular buildings or building systems.
Most of Monarfloor's solutions will meet the requirements of Section 5 and can be found within Section 5 Example Constructions. For Section 5 Robust Details please click here.