Sound-absorbing floors

Sound-absorbing floors from DUOFOR

Stable like a concrete floor Particularly in hard surface floors the exclusion of impact sound is a comfort enhancing factor. Based on many years of experience in the field of dovetailed sheeting and sound insulation, Duofor developed a solution for impact sound insulation. The insulation values of this solution reaches the same or considerably better values than a 200 mm concrete floor.
A sound insulating floor often has a characteristic airborne noise index Ilu (k) * of ≥ 0 dB (DNT, A, k = 52 dB) and a impact sound insulation index Ico * of ≥ 5 dB (LNT, A ≤ 54 dB (A).  

Ceiling on beam layers

System floors, consisting Duofor® dovetailed sheets and Duofor DTS-G Sound Insulation Strips, achieve a typical airborne sound index Ilu (k) of +3 dB (DNT, A, k = 55 dB) and an impact sound insulation index Ico of + 6 dB on an existing timber construction (LNT, A = 53 dB (A). 

Ceiling under the beam layers 

In case of an existing wooden floor, consisting of a beam layer and floor boards with a plasterboard ceiling, the maximum sound absorption index Ilu (k) is -10 dB (DnT, A, k = 42 dB) and the impact sound index Ico is -20 dB (LnT, A = 79 dB (A)). This is ultimately not a soundproofing floor. Duofor® dovetailed sheets on such a construction achieve an airborne noise index (k) of +6 dB (DNT, A, k = 58 dB) and an impact sound insulation index Ico of +10 dB (LNT, A = 49 dB (A). This floor construction achieves additional sound insulation as well as sound proofing.

* The 'old' Ilu (k) characteristic airborne insulation index is simply based on the 'new' index with the formula Ilu; k = DnT, A, k - 52. The rule here is that the higher the value, the better the sound insulation. * The 'old' insulation index for impact sound insulation is easily calculated using the 'new' index with the formula Ico = 59 - LNT, A. The rule here is that the lower the value, the better the impact sound insulation.

If you have any questions about dovetailed metal decking with sound-absorbing floor systems, feel free to call us on tel. number + 31 (0) 162 31 41 66 or email us

Duofor bundelt de kracht met YBS Insulation

Per 1 september aanstaande bundelen wij onze krachten met YBS Insulation, Engelse fabrikant van reflecterende dak-, wand-, en vloerisolatie. Duofor zal het YBS importeursschap voor het Europese vaste land volledig overnemen. Zowel de producent Duofor als YBS Insulation staan voor service en doordachte, gecertificeerde oplossingen in de bouw. De perfecte basis voor een goede samenwerking, vinden wij.