This site uses cookies to store information on your computer. Learn more about these cookies, and how to opt out of them. Find out more

NBS Source


Floating floor and room-in-room structures represent the state-of-the-art in efficiently reducing the transmission of vibration and structure-borne noise within buildings. They are

mainly used to decouple sensitive performance centres like TV, broadcasting or recording studios, recital and rehearsal rooms, theatres as well as gymnasia, but also discotheques and HVAC areas dynamically and acoustically from the surrounding structure. Special applications of floating slabs can be, for example, helicopter landing pads and seismic slabs for sensitive equipment in power stations.

For several decades our partner GERB has been developing and supplying spring elements for floating floor and room-in-room structures based on steel coil springs. They guarantee highest attenuation values by extremely low system natural frequencies. Designed to achieve system eigenfrequencies of 2.5 to 7 Hz, GERB spring elements represent the most efficient solution to protect highly sensitive areas safely and

permanently from mechanical vibration as well as structure-borne noise. The low system frequency as well as the ability of easy adjustments make them far superior to any elastic pad material like rubber, cork, or cellular foam.

Our GERB spring elements are made up of the spring, a steel housing, and an optional damping system. Steel springs provide the elastic interface needed to attenuate vibration and noise. The specific spring stiffness and the load carrying capacity of an element are determined by the type and number of springs. Spring elements of the same general type are available with a range of load capacities. Design load requirements for a specific slab can be achieved with great accuracy, by varying the type and number of elements. Although in most cases identical elements will be used, it is

possible to combine different types of elements to match particular loading arrangements.


Floating floor and room-within-a-room structures represent state-of-the-art technology to control vibration and structure-borne noise within buildings. This technology is used to separate TV, broadcasting or recording studios, recital & rehearsal rooms as well as theatres, discos, fitness studios and HVAC areas dynamically and acoustically from the surrounding environment. 

At system natural frequencies, ranging from 7 Hz down to 2.5 Hz, TVS Acoustics steel spring elements provide the most efficient solutions in protecting highly sensitive areas from mechanical vibration and structure-borne noise. 

Mitigation of structure-borne noise and vibration starts at frequencies as low as 4 Hz thus giving the TVS Acoustics system an advantage over elastic pad material. 

General information










Any length of room can be covered.



Any width of room can be covered.



Standard floor is 126mm deep concrete and then typical 40-60mm air gap, or greater if requested.

126 mm


25 year


Pr_80_77_94_84 Spring isolatorsPrimary


K11/295 Floating floor system

Product range

Acoustic Floors

Specification data - Spring isolators

Spring isolators type


Colour code



Can be designed for any loading requirements.


Gives a positive and adjustable air gap, with low frequency isolation performance and optional damping if required.

Environmental information

Contains Red List materials


Country of material origin


Country of product manufacture





TVS RESi Spring Jack-Up Floor

TVS RESi Spring Jack-Up Floor

Acoustic Floating Floors

Acoustic Floating Floors

Case studies

Primal Gym, Leeds

Primal Gym, Leeds

Building Isolation - Bridgewater Hall Concert Hall

Building Isolation - Bridgewater Hall Concert Hall

Anytime Fitness, Sheffield

Anytime Fitness, Sheffield