Acoustic Flooring Underlay: AngelStep® 250


Add AngelStep® 250 to other AngelStep® acoustic underlays for a bespoke solution to airborne and impact noise. Ideal for layering, AngelStep® 250 is just 4mm thick with an open weave polyester construction that can fine-tune the end acoustic result.


  • Residential apartments
  • Housing and commercial unit blocks
  • Commercial offices
  • Schools
  • Shopping malls

Key Benefits

  • Thin profile, maximum performance
  • Unaffected by weight
  • Multilayer capability (Note: When installation of multiple layers is required, please contact our experts at Acoustica Projects for specific installation instructions)
  • Moisture and rot resistant
  • Water and most chemical resistant
  • Won't degrade
  • Easy to install
  • Durable performance for the life of the flooring
  • 10-year guarantee and 10-year warranty (subject to correct installation and use)


  • Thin 4mm profile, AngelStep® patented technology
  • Open weave polyester construction that can fine-tune acoustic results
  • No glues or binding agent are present in this product - the composition fibres are held together by going through a double needling process
  • This manufacturing process guarantees uniform resilience throughout the material.
  • Suitable for underfloor heating systems
  • Can combine with other AngelStep® underlays or use it on it's own
  • Suitable for most floors - use with carpet and ceramic tiles, solid and engineered timber floors, vinyl 'klip' planks
  • Capable of achieving the highest 6-star rating dependent on installation
  • Zero VOC's, zero emissions and non-toxic
  • BCA compliant (separating floors between adjoining dwellings)
  • Australian designed and manufactured
  • Standard sheet size: 1200mm x 1200mm x 4mm
  • AngelStep® 250 is supplied in rolls 1.2x25mx4mm


Compressive strength at 10% deformation (EN 826) = 1.37 kPa

Dynamic stiffness (ISO 9052-1) = 100 MN/m³

Compressibility (EN 12431) = 0.2mm @ 50 kPa

Fire ratings

AS ISO 9705-2003

Classification Group 1 ;

SMORGArc: <100m2/s2; as required by BCA C1.10; tested 16/05/2012 BRANZ FI 4871

ISO 9705 1993

Classification Group 1-S; smoke production rate

VOC Emissions

VOC emissions tested by Cetec Pty Limited (CV080408) for chemical emission & is classified as low VOC. VOC Concentration 0.01mg/m3

Scores & Test Results

In the case above, AngelStep® 250 in a 3 layers system, installed under a 15mm laminated timber, was one of the best performing system in terms of floor impact noise improvement compared to the base floor, with improvement of up to 31 points in the L’nT,w rating; a result similar to a high pile carpet installed over a high quality underfelt.


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Our talented project managers have over 100 years combined sound proofing experience.

Taking a holistic approach our staff are available to provide any guidance and advise on the best soundproofing and noise reduction solution to meet your needs.

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Our Past Projects

We have experience working on a diverse range of projects and whether it be for your walls, floors ceilings, studios, meeting rooms, restaurants, sports halls and schools we can get it done! If you are a sound technician, or in the acoustics business or you are a novice we are happy to work with you and guide you on how soundproofing and noise reduction can help you!