Reflex Bearer - CMS Danskin

Reflex Bearer

Acoustic Batten for Soundproofing Timber Floors

An extensive process of research and development over many years enabled CMS Danskin Acoustics to produce an innovative flooring bearer with an exceptional level of acoustic performance. Reflex Bearer Acoustic Battens comprise softwood timber with a unique double density resilient fibre layer which provides a high degree of impact sound reduction.

Reflex Bearer Acoustic Battens contribute significantly to the reduction of impact and airborne sound on level timber or lightweight steel constructions and on concrete subfloors in new build and refurbishment applications. The softwood timber has either FSC accreditation as standard or PEFC on request.

Everything you need to know about our Reflex Bearers

Acoustic Bearers
Benefits of Acoustic Bearers
Park Bearer
Reflex Bearers
Our Commitment

Advantages

Approved FFT1 and FFT3 bearer in many Robust Detail constructions.
Approved for new Scottish Example Constructions
Exceptional impact sound reduction in party floors
Can eliminate wet trades
Provides void for services and underfloor heating
Proven durability of resilient polymer based fibre layer
Proven acoustic performance
PEFC or FSC accreditation
GWP of resilient layer is 0.

Application

Most timber, steel and concrete separating floors
Robust Detail Separating Floors E-FC-1, E-FC-2, E-FC-7,
E-FS-1, E-FT-1, E-FT-2, E-FT-3, E-FS-2
Section 5 Example Constructions 1B, 2B, 3A and 3B

Specification

Reflex Bearer Acoustic Battens comprise softwood battens 45mm ( Nom.) wide by 2400mm long with a specially developed resilient fibre strip 17mm thick adhered to the underside. They can be preservative treated if required. On average it is expected that the resilient layer will compress by around 4mm under normal loading.

Standard Heights ( unloaded ) : 53mm , 75mm and 87mm ( Nom.)

Other sizes are available to order. Timber is FSC certified as standard.

For FFT1 requirements use a 75mm Reflex Bearer Acoustic Battens.
For FFT3 requirements use a 53mm Reflex Bearer Acoustic Battens or higher.

Performance

Laboratory values for Reflex Bearer Acoustic Battens are shown below.
Please request CMS Danskin Performance Data sheets for test information on the Reflex Bearer Acoustic Battens with different structural floor and ceiling combinations.

Accessories

High Load Bearers

It is an essential feature of effective floating floors that they deflect vertically in order to absorb impact energy and therefore reduce sound transmission. However effective deflection under areas of high load such as kitchen and bathroom furniture is not desirable. While this can sometimes be lessened by reducing batten centres or using double rows of Reflex Bearer Acoustic Battens, limited numbers of high density foam battens can sometimes be used in these local areas. On concrete subfloors High Load Bearers are also recommended for use at room perimeters. As High Load Bearers have a lesser acoustic performance than Reflex Bearer Acoustic Battens a warning message regarding excessive use is printed on the top surface. High Load Bearers are manufactured to a similar height as compressed Reflex Bearer Acoustic Battens ( ie, Reflex height less 4mm ) and provide superior support.

Danskin Flanking Strip

This is placed at the perimeter of each floor . The 6mm thick preformed “L” shaped acoustic foam is supplied in strips 1.8m long and packed in bags of 100 lineal metres.The innovative “L” shape makes the flanking strip easy to fit and one size fits all floors. It is lightly trapped between the bottom of the skirting and the top of the flooring board with the excess neatly trimmed off.

Danskin Acoustic Quilt
( as required )

Where required to achieve a particular acoustic performance CMS Danskin can supply acoustic quilt.

Thickness : 25mm
Density : 19 kg/m2
Roll size : 22.5 metres long x 1.2 metres wide.

Chipboard Flooring

18mm or 22mm thick P5 T&G chipboard flooring with optional protective or decorative layers.

Sheet size : 2400 x 600

Danskin D3 Adhesive

Danskin D3 adhesive is a high quality resin based wood adhesive which provides a high strength impact resistant bond. It conforms to the international standard EN 204 (D3) and BS 4071 for creep resistance.It is supplied in 1 litre bottles.

Acoustic
Bearers

CMS Danskin Acoustics’ range of resilient acoustic bearers is designed to reduce impact and airborne sound in a wide range of separating floors.

PARK BEARERS

for concrete subfloors

REFLEX BEARERS

for timber and steel joisted subfloors

Benefits of Acoustic Bearers

Effective impact and airborne sound reduction for separating floors
Creates a void for services under the floor
Proven FFT accreditation for Robust Details and Scottish Example Constructions
Eliminates the delays caused by screeds
Use sustainable homegrown UK timber
Suitable for both new build and refurbishment

Environment

Acoustic bearers incorporate sustainable timber. Wherever possible the timber used is homegrown to minimise transportation. The Global Warming Potential (GWP) of the resilient layers on the Park and Reflex Bearers is zero.

Acoustic Bearer Product Selector

Product	Uneven Subfloors	Level Subfloors (*1)	Compatible Subfloors (*2)
Product	Uneven Subfloors	Level Subfloors (*1)	Cast Insitu	Precast Planks	Steel/Concrete Composite	Beam & Block	Solid Timber Joists	Timber I Joists	Metal Web Joists	Steel Joists
Park Bearers
Reflex Bearers

Note:

*1 – Maximum permissable deviation of 3mm from the underside of a 2m straight edge resting in contact with the floor surface.
*2 – When used with suitable ceiling construction. This table is indicative only. If uncertain, please check with CMS Danskin Acoustics.

Bearer Centres

Bearer centres must not exceed 400mm for 18mm chipboard or 600mm for 22mm chipboard based on a maximum UDL of 1.5kN/m2 and concentrated load of 2 kN. Bearer centres should be reduced to 300mm where heavy loads are anticipated. e.g kitchens and bathrooms.

Where anticipated loads exceed these figures please contact CMS Danskin Acoustics.

Park Bearer

Park Bearers are designed for use on level concrete and steel/concrete composite separating floors as part of a suitable floor and ceiling construction.

Timber floating floors incorporating Park Bearers can provide effective sound insulation on concrete subfloors and eliminate the delays caused by the drying out of screeds.

The cavity created by acoustic bearers can accommodate service runs and underfloor heating systems under the floor.

Park Bearers consist of softwood timber battens 2400mm long by 45mm wide with a specially developed 9mm thick resilient foam strip adhered to the underside.

Length	Width (*1)	Height (*2)	Height Benchmark (*3)
2400mm	45mm	54mm	FFT3
2400mm	45mm	79mm	FFT1

Notes :
*1 – Park Bearers comply with the WPIF Code of Practice for Particle Board and OSB Floating Floors (3/2018) which specifies a minimum finished batten width of 45mm.

*2 – It is anticipated that the resilient layer will compress by around 2mm under a UDL of 25kg/m2

*3 – This refers to the batten height category. Please also refer to the FFT performance table on the next page for appropriate use.

Park Bearer FFT Performance Qualification

Design Approach	Performance Requirements	Tested Performance
	England & Wales Robust Detail Constructions (*1)
E-FC-1 - Precast Concrete (min. FFT3 batten) E-FC-2 - In-situ Concrete (min. FFT3 batten) E-FC-7 - Beam and Block (min. FFT3 batten) E-FC-1 - Steel/ In-situ Concrete (min. FFT3 batten)	FFT3 Batten to be at least 45mm high (compressed) Minimum rd∆ Lw 17dB	54mm Park Bearer rd∆ Lw 24dB
	Scottish Robust Detail Construction
V-FS-1 Steel/In-situ concrete (min. FFT3 batten)	FFT3 Batten to be at least 45mm high (compressed) Minimum rd∆ Lw 17dB	54mm Park Bearer rd∆ Lw 24dB
	Scottish Example Constructions
Floor type 1B Insitu concrete slab with FFT Floor type 2B Precast concrete slab with FFT	FFT3 Batten to be at least 45mm high (compressed) Minimum ∆ Lw 22dB Minimum ∆ Rw 5dB	54mm Park Bearer ∆ Lw 26dB, ∆ Rw 8dB

Notes:

*1 – In Northern Ireland the England and Wales Robust Detail constructions are accepted as an alternative to pre-completion sound testing to demonstrate compliance with Part G (NI) for new dwellings.

Park Bearer Accessories

L-Shaped Flanking Strip for perimeter isolation.

Thickness: 6mm
Length: 1.8m

Acoustic quilt (as required).
Laid between bearers for enhanced sound reduction.

Flooring Boards

Smartspan (for use with underfloor heating )
P5 flooring grade chipboard
Engineered Spruce flooring grade plywood

Reflex Bearers

CMS Danskin Acoustics have produced an innovative flooring bearer with an exceptional level of acoustic performance which contributes significantly to the reduction of impact and airborne sound through timber and steel joisted party floors.

The Reflex Bearer incorporates a unique resilient fibre layer which provides a high degree of impact sound reduction.

Reflex Bearers are ideal on level timber or lightweight steel joist subfloors as part of a suitable base floor and ceiling construction.

Reflex Bearers consist of softwood timber battens 2400mm long by 45mm wide with a unique fibre resilient layer adhered to the underside.

Length	Width (*1)	Height (*2)	Height Benchmark (*3)
2400mm	45mm	53mm	FFT3
2400mm	45mm	75mm	FFT1
2400mm	45mm	87mm	FFT80

Notes :
**1 – Reflex Bearers comply with the WPIF Code of Practice for Particle Board and OSB Floating Floors (3/2018) which specifies a minimum finished batten width of 45mm.

*2 – It is anticipated that the resilient layer will compress by around 4mm under a UDL of 25kg/m2.

*3 – This refers to the batten height category. Please also refer to the FFT performance table on the next page for appropriate use.

Reflex Bearers FFT Performance Qualification

Design Approach	Performance Requirements	Tested Performance
	*England & Wales Robust Detail Construction (1)**
E-FT-1 - Timber I Joists (FFT1 batten) E-FT-2 - Timber Solid Joists (FFT1 batten) E-FT-3 - Metal Web Joists (FFT1 batten) E-FS-2 - Metal Joists (FFT1 batten)	FFT3 Batten to be at least 70mm high (compressed) Minimum rd∆ Lw 15dB Minimum rdDelta Rw + Ctr 13dB	75mm high Reflex Bearer rd∆ Lw 22dB rd∆ Rw + Ctr 16dB
E-FT-7 - Timber I Joists (FFT80 batten) E-FT-8 - Timber Solid Joists (FFT80 batten)	FFT80 Batten to be at least 80mm high (compressed) Minimum rd∆ Lw 16dB Minimum rd∆ Rw 17dB Minimum rd∆ Lw + Ctr 13dB	87mm high Reflex Bearer rd∆ Lw 23dB rd∆ Rw 18dB rd∆ Rw + Ctr 17dB
	Scottish Robust Detail Construction
V-FT-1 - Timber I Joists (FFT80 batten) V-FT-2 - Timber Solid Joists (FFT80 batten)	FFT80 Batten to be at least 80mm high (compressed) Minimum rd∆ Lw 16dB Minimum rd∆ Rw 17dB Minimum rd∆ Lw + Ctr 13dB	87mm high Reflex Bearer rd∆ Lw 23dB rd∆ Rw 18dB rd∆ Rw + Ctr 17dB
	Scottish Example Constructions
Floor type 3A Timber Frame Floor with Solid Joists Floor type 3B Timber Frame Floor with Engineered I Joists	FFT1 Batten to be at least 70mm high (compressed) Minimum ∆ Lw 16dB Minimum ∆ Rw 17dB Minimum ∆ Rw + Ctr 13dB	75mm high Reflex Bearer ∆ Lw 22dB ∆ Rw 17dB ∆ Rw + Ctr 16dB

Notes:

Reflex Bearer Accessories

L-Shaped Flanking Strip for perimeter isolation.

Thickness: 6mm
Length: 1.8m

Acoustic quilt (as required). Laid between bearers for enhanced sound reduction.

High Load Bearers. An option in limited areas for additional support.

Flooring Boards

Smartspan (for use with underfloor heating )
P5 flooring grade chipboard
Engineered Spruce flooring grade plywood

Our Commitment

The aim of CMS Danskin Acoustics is to correctly interpret the requirements of our customer and, where available, to offer appropriate evidence that our floating floors are suitable for use within their separating floor design. Where our customer requires specific acoustic design advice we will be pleased to assist in directing them to a suitably qualified acoustic consultant.

Floating floor treatments are only one part of a separating floor structure and the correct design, installation and workmanship of the total construction is essential to ensure satisfactory performance. Any evidence provided about the compatibility of a CMS Danskin Acoustics acoustic flooring product is dependent on the customer providing complete and accurate construction information.

The type of evidence which is necessary to justify the inclusion of our products is dependent on the approach taken by the customer to satisfy the regulations.

For each approach the evidence we can generally offer is as follows:

Building Regulations Approved Document E Guidance Construction / Scottish Example Construction route – where available , laboratory test evidence that a CMS Danskin Acoustics product meets the minimum performance requirements for the relevant floor type as set out in the each document.
Building Regulations Approved Document E / Section 5 / Part G Pre Completion Testing Route – where available, site test evidence of a similar construction demonstrating performance above the minimum standards. It is the customer’s responsibility to establish whether this evidence is sufficient.
Robust Detail Construction route – Where available, laboratory test evidence to demonstrate that the product or system meets the rd∆ Lw / rd∆ Rw / rd∆ Rw + Ctr specified in the relevant RD Document.

installation

To ensure correct installation of floors the manufacturer`s detailed fixing instructions must be followed carefully. Copies of these instructions are available from CMS Danskin Acoustics.