Acoustic product certificates are international standards that document a material's laboratory-measured performance and fire safety. All products we supply carry certificates such as BS 476 Class 0, EN 13501-1, UNI 9175 Class 1IM, EN ISO 717-1 (Rw), EN ISO 354 (NRC). We do not include uncertified products in our project portfolio.
Why are acoustic certificates important?
Acoustic material cannot be assessed visually. Two panels may look identical; one may deliver NRC 0.85 while the other stays at 0.30. A certificate proves the product was tested in an accredited laboratory under standard conditions and the report was officially published. Without a certificate the rating is "what the manufacturer claims" and has no legal or technical validity.
Which certificates do we look for?
Acoustic performance certificates
- EN ISO 717-1: Rw (European sound-transmission classification)
- ASTM E413: STC (American equivalent)
- EN ISO 717-2: ΔLw (impact-noise reduction)
- EN ISO 354: NRC / α (sound-absorption coefficient)
- EN ISO 3382: RT60 and room-acoustic parameters
- EN ISO 7235: silencer test standard
Fire safety certificates
- BS 476 Part 6 / Part 7 — Class 0: British standard, surface flame spread
- EN 13501-1: European fire-behaviour classification
- UNI 9175 Class 1IM: Italian fire behaviour (especially for Italian-origin products)
- NF P 92-507 — M1: French fire class
- DIN 4102 B1: German low-flammable class
- FMVSS 302: automotive interior
Environmental and health certificates
- RoHS: hazardous-substances restriction
- REACH: EU chemical registration
- Greenguard / Gold: low-VOC emissions
- FSC: sustainable forest product (for wood panels)
- LEED-compliant: green-building certification
How to read a certificate
- Lab name and accreditation number — must be an internationally accredited body
- Full product description — thickness, density, manufacturer, model
- Test date — reports older than 2-3 years may be outdated
- Single value + octave-band table — not just "Rw 50" but performance across the frequency band
- Test method reference — standard name like ISO 10140-2, ASTM E90
Lab vs reality
Certificate values are measured under laboratory conditions. In the field a 5-10 dB drop is normal. Acoustic engineering therefore always builds in a safety margin; if site target is 50 dB, an Rw 55-58 dB certified product is selected.
What if there is no certificate?
If an acoustic product has no certificate there is no formal commitment regarding its performance. A supplier saying "ours is Rw 50" but unable to produce a document may actually deliver 30-35 dB. Uncertified products create issues both at handover and during building inspection.
Dedatek supply policy
In 25 years we have never used an uncertified product in any project. Compliance with at least one of the standards above is our minimum entry requirement. This discipline bridges the commitment made before installation and the performance after.
Products in This Category
For each sub-service we apply a dedicated engineering approach and certified material selection. Click on a title to explore.
Firex fire-retardant range
DetailsBS 476 Class 0
DetailsUNI 9175:2008 M1
DetailsCE / ISO / TSE
DetailsWhy Dedatek Products?
Expert Team
With our acoustic engineers and experienced application team.
Guaranteed Results by Measurement
Pre and post application dB measurement, detailed report.
Turnkey Delivery
Survey, simulation, application, inspection — the entire process at Dedatek.
Certified Materials
BS476 Class 0, UNI 9175, Firex non-flammability standards.
Supply & Installation Process
Inspection & Measurement
On-site acoustic measurement and noise source identification.
Simulation & Design
Acoustic simulation and detailed project with professional software.
Installation
Installation with certified materials by our experienced team.
Inspection & Report
Result measurement and performance guarantee report.
Certifications & Standards
- BS476 Class 0 (non-flammable)
- UNI 9175:2008 M1
- Firex non-flammability certificate
- CE / ISO / TSE compliance