Floating floors, advanced vibration isolation mats, edge strips – each of these materials performs excellently in the manufacturer's laboratory catalog. However, in the finished building, the final result is determined by uncompromising physics: 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).

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

What is impact sound insulation?

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

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

When is measurement a business necessity?

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

• Acceptance of the project (Before handover of the keys): Before the developer or general contractor signs the acceptance report, we verify the slabs. If the insulation does not meet the standards, remediation at the developer-standard stage is difficult, but possible. After the keys are handed over to the purchaser, it becomes an extremely costly and legally contentious process.

• Diagnosis of after-sales complaints: The apartment or office owner reports bothersome impact noise. Instead of tearing up the entire floor "blindly", our measurement identifies the source of the problem. We check whether the slab has failed, whether perimeter expansion joints are missing, or whether lateral transmission through walls is to blame. We point to a targeted intervention instead of a full 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 the panels. Comparative measurement on the bare slab and after installation of the system provides a clear, engineering answer to the question: "does this material work in my case?".

How do we work? (Technology and Diagnosis)

We leave assumptions at the door. We perform measurements strictly in accordance with 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 response, because the problem of troublesome "boominess" is often hidden in a narrow low-frequency band. At the same time, our team identifies the physical causes of reduced insulation (bridges, lack of continuity).

Where do we conduct tests?

We carry out measurements in multi-family housing, premium apartments, hotels, office buildings, schools, medical facilities, as well as in renovated buildings and after floor layer replacement.

A report that protects your budget

After completion, 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, a diagnosis of the causes of poor performance, and precise remedial recommendations.