Floor acoustic insulation: regulations and requirements 2025
Floor acoustic insulation: regulations and requirements 2025
In Italy, passive acoustic requirements for buildings are set by DPCM 5/12/97.
The key parameter for impact noise is L’n,w: staying within limits means better comfort and regulatory compliance.
Limit values and test methods
Full text: DPCM 5 December 1997 – Passive acoustic requirements
The role of recycled rubber underlay
A recycled rubber underlay with ΔLw of 15–18 dB helps meet L’n,w limits—especially in renovations without redoing the slab.
It’s water-resistant, stable in performance, and supports sustainability criteria (CAM).
Mini-FAQ
Is an underlay always needed?
It’s the quickest way to reduce L’n,w without invasive work.
Compatible with underfloor heating?
Yes, if certified for thermal resistance.
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