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Acoustic Behaviour



Noise transmitted via vibration is one of the most detrimental aspects of a new building. It is both airborne and transmitted through materials at different speeds.

The types of noise that are usually associated with flooring are:

- airborne noise;

- the sound of impact, mainly by the floor being walked on or items knocking against the floor;

- noise from underlying utilities.

The technical features and technology of a raised floor are an effective solution for the issue of noise because of its structure. In particular, they help reduce the problem of foot traffic and conducted noise as required by Italian law.

If the floor surface is raised higher than the slab, a layer of elastic sound buffering material can be laid to make the structure less unyielding than the floor's surface. Moreover, as it is totally independent from the structure, it can vibrate without any point of contact with the floor and the walls.

The slab and the floor have to be designed and fitted with due care: there must not be any direct contact with the walls otherwise the efficiency of the system will be lost. Likewise, the choice of innovative and high performance materials is fundamental for optimum results.

As regards the noise created by vibrations due to impact, a raised floor can break their continuity using elastic materials and supports, as a cavity is created that can accommodate these parts, or isolates them using anti-vibration material to control the noise.

The use of additional strategies in the complementar y works can boost the acoustic parameters of the floor.

Reference standard
Italy passed a law on 5-12-1997 regarding the issue of the acoustics in buildings entitled "Determination of the passive acoustic requisites of buildings", which defines the criteria and methods for controlling noise pollution within residential buildings in order to reduce exposure to noise.

Exemples of acoustic behaviour

Welcome to Granitech

Granitech deals with design and installation of ventilated walls and raised floors. Using state-of-the art technologies Granitech develops top quality solutions for important projects in contemporary architecture.

Ventilated Facades

Ventilated walls are multi-layer construction solutions for "dry" cladding of outside walls, improving their aesthetic qualities, degree of protection and insulation.

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Floating Floors

A raised floor is a flooring systems designed to meet the different needs of working areas with high concentration of plant engineering systems.

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Definitions of terms and phrases commonly used in ventilated and raised applications.

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