This underlay works for both floating installation beneath click-design or loose-lay floors and for bonding under design, PVC, linoleum, and engineered parquet to reduce impact noise. Achieves impressive sound reduction values despite its thin 1.2mm profile: up to 22 dB reduction under floating click-design floors and 19 dB when bonded. Meets all pressure stability, creep resistance, and underfloor heating requirements at the highest standards.