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  1. 22mm (minimum) t&g flooring board – 600kg/3
  2. 19mm Plasterboard Plank
  3. 15mm OSB Board
  4. E-FT-7, E-FT-8 (UltraBEAM) floor types require Mineral Wool Quilt laid between the battens of: 50mm (minimum) 10-36 kg/m3
  5. JCW L Shaped or Flat Perimenter Edging Strip detail
  6. Resilient bars and 2 layers x 15mm Acoustic Plasterboard
  7. JCW 90T Acoustic Batten

Acoustic Batten  90T is ideal for timber FFT-1 Floating Floor Types: E-FT-7, E-FT-8 and E-FS-2

  • Raised floor space can be used for installing services
  • Ideal for good impact and airborne sound improvement
  • Size: 90mm deep x 42mm x 1800mm
  • Weight: 2.9 kgs

Reduction in Impact Sound Transmission: rd Δ Lw 16 dB

Improvement in Airborne Sound Insulation: 13 dB Rw + Ctr

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    Acoustic Batten 90T Animation

    Product Code JCW 90T
    FFT-1 Resilient Composite Deep Batten System
    Timber batten laminated to a 9mm acoustic resilient layer
    Robust Detail (Registered Sites)

    Verified independent UKAS accredited laboratory test data that meets the Robust Detail requirements. Pre-completion testing is not required

    Acoustic Batten JCW 90T = FFT-1 Floating Floor types: E-FT-7 & 8, and E-FS-2 (Refer to Robust Details Handbook for full specification)

    PCT/PT & Refurbishment

    Verified independent UKAS accredited laboratory test data is based on the floor structure illustrated above

    It is essential all components are correctly installed and detailed to meet the requirements where Pre-completion Sound Testing is required

    Size: 90mm x 42mm x 1800mm Weight: 2.9 kgs (JCW 90T) – Other batten sizes are available on request
    Robust Detail Performance

    Reduction in Impact Sound transmission; rd ∆ Lw = 16 dB

    Improvement in Airborne Sound insulation; rd Rw + Ctr = 13 dB

    Tests were carried out by Sound Research Laboratories, UKAS accredited test laboratory No. 0444 on the 7th October 2013. Test Report No. C/22610/T01
    Typical PCT Performance: Airborne; DnT,w+Ctr = 49 dB Impact; L’nT,w = 52 dB
    Method of Compliance

    Robust Detail, PCT/PT (Scotland)

    Ancillary Products
    1130 JCW Flat Edging Strip (50 Lm x 150mm x 5mm) or
    1170 JCW Universal L Shaped Strip (2 Lm x 53mm x 23mm)
    1196 JCW Waterproof PVA Adhesive (1 Litre)1027 JCW Acoustic Sealant (310ml)


    Ensure the building is watertight and completely dried out before installing the floor.

    JCW Acoustic Battens should only be installed when conditioned to their environment and ideally their moisture content should be the same as can be expected when in service.

    JCW Acoustic Battens are designed for installation onto flat sub-floors of Timber or Concrete construction. (Note: If Concrete floors are not flat the alternative is to use JCW Acoustic Cradles & Packers to enable batten levelling) The purpose of the flooring system is the reduction of sound and is not intended to provide additional structural support or thermal insulation.

    The capacity of existing joists to carry the weight of JCW Acoustic Battens and associated panels must be checked prior to installation.

    Any decking on which JCW Acoustic Battens are to be laid should be flat and dry.

    To reduce airborne sound it is vital to block any air passage in the structural floor, at the perimeter of the floor and wherever the floor is penetrated.

    Only an appropriate acoustic sealant should be used to
    seal perimeter gaps in order to maintain the acoustic integrity of the structure.

    Any flooring components exposed to wet conditions such as ingress of rain or plumbing leaks should be discarded and replaced.

    Please note that we strongly recommend that all drylining and skimming works are carried out prior to installing our acoustic floor.

    This sequencing reduces the risk of the acoustic floating floor being damaged as a result of overloading with pallets of plasterboard.


    The provision of access to services is most successful if the location of services is detailed at an early stage.

    Services should be kept at least 150mm away from walls and door-ways to allow for perimeter support battens.

    We recommend a gap of around 20mm is allowed above the height of the services to cater for clearance and deflection of the resilient layer.

    Step by step guide:

    1. Sweep floor clear of debris
    2. Position JCW Perimeter Edging Strip at the base of all perimeter walls (this will be trapped in place by the plasterboard plank and chipboard flooring sheets)
    3. Lay a continuous run of JCW Acoustic Battens, foam side down, around the floor perimeter, leaving a 50mm gap between the battens and the walls
    4. JCW Acoustic Battens are laid, foam side down, at maximum 600mm centres for 22mm flooring board. Lightweight internal partitions can be erected directly on to the finished floor – but the layout must be carefully planned to provide double battens under the partition for (Areas of Heavy Loading: see below)
    5. Lay 50mm (minimum) 10-36kgs/m3 density mineral wool quilt between the battens
    6. Lay the plasterboard plank to the battens, staggering the joints and ensuring that all short edges of plank rest centrally on a batten. Butt the plasterboard plank up to the perimeter edging strip
    7. Lay the chipboard flooring sheets with the long edge across the battens. Short joints should be staggered and supported by extra sections of batten. To ensure tight jointing, each tongue and groove is glued with JCW Waterproof PVA Adhesive.
    8. Remove tongues and grooves from chipboard sheets at the perimeter to ensure that only square cut edges butt up to the JCW Perimeter Edging Strip
    9. Any unavoidable gaps are filled with JCW Acoustic Sealant
    10. The JCW Perimeter Edging Strip is folded over the chipboard floor and trapped under the skirting board – the excess is then trimmed to finish flush to the skirting board
    11. The completed floor should not be walked on for at least 48 hours to ensure the adhesive has fully cured
    12. Decorative Floor Finishes: Specialist advice is required when a) installing Tiling and b) Sheet & Tile Vinyl/Rubber etc type flooring onto floating chipboard surfaces.
    13. The British Standard that covers these works states that screwing will only minimize squeaking. Our recommended solution is to loose lay the plasterboard on to the batten and then spot bond the chipboard to the plasterboard using JCW Acoustic Sealant.
    Batten 90T

    Threshold Detail

    Batten 90T

    Support of Non-Load Bearing Partitions

    Batten 90T

    Internal Wall Junction (Loadbearing)

    Batten 90T

    Internal Wall Junction Loadbearing (Rip Linear alternative detail)

    Areas of Heavy Loading

    In areas where heavy loadings are anticipated, such as kitchens and bathrooms, battens centres should be reduced to 300mm to provide additional support.

    Floor Loadings: JCW Acoustic Battens fully comply with BS 6399-1 for commercial floor loadings; 4 kN per m2 uniformly distributed load.


    Where wood chipboard is used, the width of the expansion gap should be increased all round by an amount equal to 1mm for every metre above 12 metres of the width or breadth of the floor.

    How to satisfy Building Regulations requirements for sound transmission through intermediate party floors

    The Building Regulations require that certain types of property must be designed to provide reasonable resistance to sound from other parts of the same building and from adjoining buildings.
    Building Regulations Doc: E (England & Wales)

    Airborne Sound Insulation DnT,w + Ctr dB (minimum) Impact Sound Insulation L’nT,w dB (maximum)
    New Build 45 62
    Material Change of Use 43 64

    Section 5 Scotland Performance Standards

    Airborne Sound Insulation DnT,w + Ctr dB (minimum) Impact Sound Insulation L’nT,w dB (maximum)
    New Build (mean values) 52 61
    Change of Use 52 61

    Guidance for using Resilient Bars

    Screw fix the pre-drilled section of the resilient bars at 400mm centres and perpendicular to the joists, battens or studs.

    Screw fix acoustic plasterboards to the flat underside of the resilient bars, allowing a clearance of 100mm of the supporting timbers.

    It is imperative that no screws penetrate through the resilient bar and into the supporting structure.

    Batten 90T

    Design Considerations

    There are three main approaches you can follow when designing floor and ceiling constructions:

      1. Follow the guidance/specified constructions shown in Approved Document E 2003 (England & Wales) and in Section 5 of the Technical Handbooks (Scotland)
      2. Design your own construction
      3. Register and construct a design operated by Robust Details Ltd. (England & Wales) Pre-Completion acoustic testing will be required for a number of these approaches.

    Guide to the site testing regime

    Design Approach Testing Requirements (England & Wales) testing Requirements (Scotland)
    Guidance / Specified Construction Compulsory testing Testing at discretion of Building Control
    Own Design Compulsory testing Compulsory testing
    Rubust Detail Exempt from testing Testing at discretion of Building Control

    More information about Robust Detail can be found at

    Advice and Technical Assistance

    If in any doubt that a floor construction will meet Building Regulations, please contact us for technical support and advice or for more information about any of our acoustic products and solutions.

    Disclaimer: The product and installation information contained in this Data Sheet and General Installation Guide is to the best of our knowledge correct. Please contact us direct, prior to starting works, for the latest information to enable confirmation of the specification.

    Please click here download our Acoustic Batten 90T Timber Floor Batten technical PDF