Bio Building

How to contain the sound of footsteps

The solution is the floating floor with a robust layer of soundproofing material

If you are reading this article chances are you have one problem with the neighbor upstairs, or the one downstairs has a problem with you. Know immediately that if the problem we are talking about is the trampling noise - the main source of disturbance in multi-family dwellings - radical and truly decisive solutions do not exist, unless invasive and expensive building interventions. Impact noise in buildings is a problem to be prevented rather than treated, and prevention is done in the project and realization.

The most effective system for containing footfall noise - which originates from the vibration of the insole and is perceived as being radiated by air (footsteps, falling objects, slamming doors, vibrating appliances) - it is the so-called floating floor, which essentially consists in creating a discontinuity between the floor and the insole by one resilient separator layer sufficiently rubber band. It is important that the resilient layer is also interposed between the floor screed and the walls, so as to avoid the contact between the two rigid structures and the consequent acoustic bridge that would let the noise pass.

A good floating floor can achieve improvements of the order of 15-20 dB and even more. The solutions 'from below' (countertops), on the other hand, have a very limited effectiveness with respect to impact noise: in fact, if the transmission is not only through the floor, but involves the entire structure, a countertop will be able to intercept only a part (and often minimal) of the sound energy connected to the impact event obtaining an improvement contained in a few decibels (no more than 5-8 dB).

Regarding the quality and consistency of the damping separator layer it must be said that the normal impact soundproofing mats used in standard construction are almost never effective, unless you are dealing with very massive and very damping slabs (which is quite rare). Better then not to save oninsulating acoustic, not even in centimeters, focusing on materials with good elasticity and excellent soundproofing capabilities, as well as resistant. The best choice is the natural blond cork, in panels or granules mixed in the caldana system, which in addition has the advantage of being a perfectly eco-friendly material.

As for the acoustic improvement to the impact noise linked to the choice of the flooring finish, the following examples apply.

. Floating strip parquet on felt tape with cork underlay: 24 - 25 dB

. Soft PVC mat with polyvinyl foam: 22 dB

. Vinyl carpet on compressed wood fiber panels and light wood fiber panels: 21 dB

. Mosaic parquet glued on agglomerated cork: 18 dB

. Vinyl on felt carpet (500 g / m2): 17 dB

. Vinyl carpet on textile support: 5 - 10 dB

. Glued mosaic parquet: 7 - 8 dB

. Linoleum: 7 - 8 dB

Video: Call of Duty Warzone - The Truth about Footstep audio (October 2020).