Sound Proofing Wooden Floors

Sound transmission through the floor is a common noise problem in multi-family dwellings such as condominiums, apartments and town houses.

When using an engineered board the most common method is to float the floor by gluing the tongue and groove and lay an acoustic sub-floor mat that ranges from a basic 10mm to 15mm foam thickness. This can absorb part of the sound through it high density which has been proven to have high acoustic properties and comply with UK building regulations.


Accorub® is an acoustic mat, produced from foamed rubber granules that are bonded with a high-quality polyurethane based adhesive. Additives added to the system optimise the acoustic and mechanical properties. Due to the specific open-celled structure of the granules, very good acoustic properties are obtained. Accorub® acoustic mats exist in different thicknesses (10 to 150mm) with densities starting at 120 kg/m3.

Accorub® Technical Details

Density Standard 120 kg/m3
Size 100 x 200 cm standard
Thickness 10mm
Dynamic Stiffness 16,2 MN/m3
Impact Sound Insulation Category 1a
Airborne Sound Insulation Category 2b
Heat Conductivity Coefficient 0,04 W/mK

Date of test: 13/10/04 Measurements procedure: ISO 140-8:1998

Test procedure: Iso 717-2:1996
University of Salford School of Computing, Science & Engineering
Full report available upon request

Accorub® Test Results

Accorub ® Impact
Improvement of impact Insulation ALW on timber subfloors 33dB
Improvement of impact Insulation ALW on concrete subfloors 37dB
Weighted Norm. impact sound pres. Level Ln101W 85dB
Weighted Norm. impact sound pres. Level Ln1|1W 49dB
Weighted Norm. impact sound pres. Level Ln1r1W 45dB


Graph: Impact sound improvement


Illustration 1: Floor Build up with Parquet Engineered on Site


Illustration 2: Floor Build up with Engineered Flooring.