SOUNDPROOFING TECHNICAL INFORMATION
Clients install impact sound-proofing to comply with Building Regulations 2003 Approved Document E plus Amendment 2004 which require a maximum of 62 decibels of impact noise for flats. A timber floor transmits approximately 75 decibels of impact noise, hence the need for an impact sound reducing product.
Walking on Wood uses several approved impact sound-proofing products, but recommends Accorub® because it offers excellent quality relative to its cost, consistently reducing impact sound to approximately 42 decibels - well below the 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 150 mm) with densities starting at 120 kg/m3.
Certificates
Building Regulations 2003 Approved Document E
WTCB DE 631X825 Dynamic stiffness
WTCB DE 631X798 Acoustic airborne sound installation
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 |
Accorub® Test Results
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| 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 |
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
