AngelStep® GOLD 8 acoustic underlay

The AngelStep® range is an acoustic underlay for the treatment of Impact and airborne noise transfer.

AngelStep® construction combines a highly effective support and cushion. It provides maximum performance for minimum thickness combining an impact and vibration damping and sound absorber.

The resilient polyester core layer absorbs impact energy and residual airborne noise from above and below, transforming wave vibrations into heat energy. The ‘decoupled flexible floating’ top noise barrier greatly reduces airborne sound waves noise above or below the floor - and complies with the Building Code of Australia in respect to separating floors between adjoining dwellings. When AngelStep® is installed, it delivers optimum performance and comfort for both resident and neighbours alike

Compared to products made by others, Acoustica’s AngelStep range of underlays have been shown in independent comparison tests to offer a more effective acoustic treatment, a thinner solution, that is also cost effective.

The unrivalled performance of AngelStep® GOLD 8 was designed for use in apartments and townhouses, upmarket housing and professional office and consulting suites where discerning buyers expect performance beyond that mandated by the minimum requirements of the BCA.

The performance of AngelStep® GOLD 8 is due to its unique and patented construction – a laminate of double needle punched high density sound absorbent polyester and a resilient ‘cross linked’ microcellular foam.

It is approx. 6.7mm thin & is supplied in tiles 1150x1150mm (1.3225m2)

Unlike competitive underlays AngelStep® GOLD 8 has been engineered as a universal underlay to deliver optimum acoustic performance according to the flooring type. Select installation option – of polyester side facing up/down or foil moisture barrier side facing up/down depending on end result required.

The product has been independently tested to achieve Lnt,w of 40 - equivalent to AAAC rating 6 stars:

  • Independently tested by West and Associates Pty Limited document 14201 28/10/2014 = GOLD 8 + 15mm plywood + 15mm timber floor on a concrete slab with vermiculite result Lnt,w 36 = AAAC 6 stars
  • Independently tested by Palmer Acoustics Australia Pty Limited document 3770 v.0 28/11/2014 = GOLD 8 + 14mm thick timber on a concrete slab result Lnt,w 40 = AAAC 6 stars
  • Independently tested by Wilkinson Murray Pty Limited document 16195/270516BC 27/05/2016 = GOLD 8 + ply + 14mm engineered timber floor on a concrete slab with no ceiling cavity result Lnt,w 38 = AAAC 6 stars 
  • Independently tested by Vipac Engineers & Scientists Ltd 07/07/2016 to achieve AAAC 6 stars Lntw 35 in combination with AngelStep 630 (test conditions 15mm engineered oak floor on 2 layers of AngelStep GOLD 8 with AngelStep 630 between over concrete slab, 80mm cavity & 10mm plasterboard (report 20E-16-0089-TPR-456023-0)
  • Independently tested by Vipac Engineers & Scientists Ltd 06/10/2016 to achieve AAAC 6 stars Lntw 40 with Novocore vinyl flooring over 200mm concrete slab with bare concrete ceiling (report 20E-16-0192-ADM-456564-0)
Apartment dwellers have long complained about impact noise intrusion due to footsteps and clatter of utensils and articles dropped on to the floor in apartments overhead. In addition to this impact noise, many occupants have also endured excessive airborne noise transmitted from powerful TV and audio systems.

AngelStep® GOLD 8

The unrivalled performance of AngelStep®  GOLD 8 was designed for use in apartments and townhouses, upmarket housing and professional office and consulting suites where discerning buyers expect performance beyond that mandated by the minimum requirements of the BCA.

AngelStep® GOLD 8 achieves this due to its unique and patented construction - a laminate of double needle punched high density sound absorbent polyester and a resilient “cross linked” microcellular foam.

It is 6.7mm thin & is supplied in tiles 1150x1150mm (1.3225m2)

 

 

AngelStep is a resilient product, however the intent is that the product is providing an acoustic treatment. In any arrangement it is important that the flooring system that is installed above the acoustic underlay has its own structural integrity.

typical installation drawings

for more information please contact us

Key Benefits

Up to AAAC 6 Star Rating 

6.7mm thin

Universal underlay "one size fits all" - for solid timber, bamboo, laminated timber, veneer, carpet, parquetry, tiles, vinyl, cork etc

Thin product with the highest performance 

High sound absorption

High impact insulation and strength

Water & most chemical resistant

Will last the life of the flooring

Easy to install

No VOCs, no smell

Suitable for under-floor heating

Australian designed & manufactured, Australian made


Gold foil up (for a softer footfall feel)

solid timber

engineered (laminated timber)

bamboo

veneer

carpet

Gold foil down (for a harder support)

parquetry

ceramic tile

vinyl

cork

Product Specifications

Standard panels are 1150x1150x6.7mm easily cut to size

Unlike competitive underlays AngelStep® GOLD 8 has been engineered as a universal underlay to deliver optimum acoustic performance according to the flooring type. Select installation option – of polyester side facing up/down or foil moisture barrier side facing up/down depending on end result required.

Installation of AngelStep® GOLD 8 should have arrows facing in the same direction

L'nT,w 34 AngelStep GOLD 8 (foil down) under 6mm FC sheet under 600x300x10mm polished marble stone tile, over 220mm concrete slab with suspended plasterboard ceiling

test 2199/1 by West & Associates 25/06/2015 


L'nT,w 35 AngelStep GOLD 8 (foil down) under 15mm tongue & groove timber, over 220mm concrete slab with suspended plasterboard ceiling 

test 2199/1 by West & Associates 25/06/2015 


L'nT,w 35 AngelStep GOLD 8 (foil down) under 20mm tongue & groove timber, over 220mm concrete slab with suspended plasterboard ceiling 

test 2199/1 by West & Associates 25/06/2015 


Acoustic tapping report

Acoustica’s product range of noise control solutions for flooring systems has been repeatedly independently tested to consistently achieve six stars in the Association of Australian Acoustical Consultants (AAAC) star rating system. However, results will vary depending on the construction, substrate and surface materials of each project. 

Acoustica can provide site specific testing and certification for each project site, prepared in accordance with the International Standard ISO 16283-1:2014 Acoustics -- Field measurement of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation (refer ISO 140-7:1998). There is a charge for this service; for more information on a tapping test see this link

 


Technical

The BCA provides minimum construction standards for various building classes including acoustic privacy. The BCA requirement is a weighted standardised impact sound pressure level with spectrum adaptation term Ci, of less than or equal to 62 Lnt,w+Ci. However, the reality is that this is in most cases unacceptable to occupants and can result in the need for costly reparation works.  In response the Association of Australian Acoustical Consultants (AAAC) has developed the star rating system to rank the acoustical quality of apartments and provide guidance in the design and construction process.

table 4: AAAC star rating system

AAAC star ratingimpact isolation of floors Lnt,wAAAC descriptionapprox IIC rating
2 starLnt,w 65clearly audibleapprox IIC 45
BCALnt,w 62BCA clearly audibleapprox IIC 48
3 starLnt,w 55clearly audibleapprox IIC 55
4 starLnt,w 50clearly audibleapprox IIC 60
5 starLnt,w 45audibleapprox IIC 65
6 starLnt,w 40just audible or barely audibleapprox IIC 70
source: AAAC

We note that according to the Australian Association of Acoustic Engineers (AAAC) the IIC rating system has been replaced by a measurement called LnT,w (extract from AAAC literature):

Structure borne noise includes footsteps on hard floors, scraping chairs and dropping objects. For this type of noise, Australia and New Zealand have adopted the measurement called the weighted standardised impact sound pressure level LnT,w. A reduction in this parameter corresponds to an improvement in impact isolation. This replaces Impact Insulation Class (IIC), which is in common use in Australia. The AAAC rating system uses LnT,w. There is an approximate relationship between LnT,w and IIC. Either value can be subtracted from 110 to approximately indicate the other.

 

 


References

  • NCC 2016 Building Code of Australia (BCA) Version 1.0 February 2016 release date May 2016
  • ISO 12999-1:2014 Acoustics -- Determination and application of measurement uncertainties in building acoustics -- Part 1: Sound insulation (refer ISO 140-2:1991)
  • ISO 16283-1:2014 Acoustics -- Field measurement of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation (refer ISO 140-7:1998)
  • ISO 16283-1:2014 Acoustics -- Field measurement of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation (refer ISO 140-14:2004)
  • ISO 717-1:2013 Acoustics -- Rating of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation (refer AS/NZS 1276.1:1999Acoustics - Rating of sound insulation in buildings and of building elements - Airborne sound insulation)
  • Association of Australian Acoustical Consultants (AAAC) Guideline for Apartment and Townhouse Acoustic Rating Version 9.7 November 2010
  • Association of Australian Acoustical Consultants (AAAC) Guideline for Commercial Building Acoustics May 2011
  • Australian Building Codes Board (ABCB) Guideline Document on Sound Insulation in Buildings 2004
  • AS 1530.1-1994 Methods for fire tests on building materials, components and structures - Combustibility test for materials
  • AS/NZS 1530.3:1999 Methods for fire tests on building materials, components and structures - Simultaneous determination of ignitability, flame propagation, heat release and smoke release