Floating floors, advanced vibration isolation mats, edge strips – each of these materials performs perfectly in a manufacturer’s laboratory catalog. However, in a completed building, the final result is determined by uncompromising physics: floor slab mass, continuity of the resilient layer, and the absence of hidden material bridges (e.g., a drop of concrete connecting the screed to the wall).

On-site measurement of impact sound insulation is the only way to verify the actual effectiveness of the completed system. We do not read declarations – we measure facts.

What is impact sound insulation?

It is a parameter (denoted as L'nT,w or L'n,w) that describes a floor slab’s ability to attenuate noise caused by direct impact on the structure. Walking in hard shoes, moving a chair, a falling object, or children playing – all of these generate impact waves that propagate through the building structure with doubled force.

The Polish standard PN-B-02151-3 sets strict limits. For multi-family residential buildings, the L'nT,w index must not exceed 58 dB (and in the case of a higher developer standard, even 55 dB). Our measurement provides a clear answer as to which side of this limit your investment is on.

When is carrying out a measurement a business necessity?

In construction, response time determines costs. We operate in three key scenarios:

• Investment handover (Before handing over the keys): Before a developer or general contractor signs the acceptance report, we verify the floor slabs. If insulation does not meet standards, repair at the developer-finish stage is difficult but possible. After handing over the keys to the buyer, it becomes an extremely expensive process and legally disputable.

• Diagnosis of post-sale complaints: The owner of an apartment or office reports troublesome impact noise. Instead of tearing up the entire floor "blindly," our measurement identifies the mechanism of the problem. We check whether the slab failed, whether perimeter expansion joints are missing, or perhaps lateral transmission through walls is to blame. We indicate targeted intervention instead of a general renovation.

• Material verification (R&D / Prototyping): The design assumed a gain of ΔLw = 20 dB thanks to the use of a specific acoustic underlay beneath panels. Comparative measurement on a raw slab and after system installation provides a clear, engineering answer to the question: "does this material work in my case?".

How do we work? (Technology and Diagnosis)

We leave guesswork at the door. We carry out measurements strictly according to the ISO 16283-2 standard, using a standardized impact source (professional tapping machine).
We analyze the sound spectrum across the full band (from 50 to 5000 Hz) and determine the L'nT,w index in accordance with ISO 717-2. However, we do not stop at providing a single number. We examine the frequency characteristic, because the problem of troublesome "booming" is often hidden in a narrow low-frequency band. In parallel, our team identifies the physical causes of reduced insulation (bridges, lack of continuity).

Where do we conduct tests?

We perform measurements in multi-family housing, premium apartments, hotels, office buildings, schools, medical facilities, as well as in modernized buildings and after replacement of floor layers.

A report that protects your budget

After completion of the work, you receive a comprehensive engineering report. It includes: measurement results in frequency bands, the calculated index value (L'nT,w or L'n,w), an objective assessment of compliance with PN-B-02151-3, diagnosis of the causes of poor performance, and precise corrective recommendations.