Concrete Floating Floor System

‘Traditional’ Floating Floors

Concrete floating floors (density ~ 2360kg/m3) are the most common type of Acoustic Floating Floor due to their high strength, weight and versatility. This type of system is more economical than a Jack-up system as it creates a full area, homogenous slab with minimal flanking.

Farrat Concrete Floating Floor System

  • The thickness of the concrete slab should be kept above 90mm to avoid excessive surface cracking.
  • Typically mesh reinforcement is used but where no walls or structural elements are supported by the floor then fibre reinforcement can be used. Slab designs should be checked by a structural engineer.
  • Screed floating floors (density 2100kg/m3) are ideal for smaller areas where it is not economical to pour concrete, where the slab thickness ranges from 50 to 100mm and in lower impact environments such as recording studios and music rooms.
  • Isomat elastomeric isolators provide low stiffness/high resilience (allowing natural frequencies as low as 6Hz), low creep under compression load and low ratio of dynamic-to-static stiffness
  • When a Concrete System is installed by Farrat’s specialist Floating Floor installation team, Acoustruct, we provide a guarantee of complete isolation so there is no need to be concerned about bridging.

For more information on using a Concrete Floating Floor System (including standard details), please download our Farrat Technical Brochure:

To find out more about the Farrat products used in Concrete Acoustic Floating Floors, please see the following pages or download our Farrat Datasheets:

Typical Applications:

  • Buildings located next to major rail lines or roads
  • Cinemas
  • Theatres
  • Concert Halls
  • Conference Centres
  • Recording & Broadcasting Studios
  • Music Practice Rooms
  • Operating Theatres
  • Sensitive Medical Equipment Rooms


Floating Floor - Theatre Isolation
Philarmonie portes ouvertes 2

Typical Applications:

  • Dance Studios
  • Bowling Alleys
  • Nightclubs
  • Hotels
  • Gyms
  • Plant Rooms
  • Reverberation Rooms
  • Nanotechnology Facilities


Floating Floor - Dance Studio Isolation
Floating Floor - Gym isolation
Floating Floor - Reverberation Chamber
Step 1
  • Ensure floor area is clean, clear of debris and level. Bond the lateral isolation strips to the perimeter walls at the edges, as well as any protrusions into or through the floor
  • If the perimeter walls are not in place, erect lateral formwork first
Step 2
  • Mark out an appropriate grid for the isolators, typically 600-610mm cross centres
    • The grid will be different for 2440x1220mm plywood sheets than it would be for 2400x1200mm sheets
    • Extra isolators may be needed to support corners and cuts
    • Mineral wool can be added between isolators
Step 3
  • Place ply sheets onto isolators and secure in place by screwing into some corner isolators
    • Ensure no fixings bridge to the structural slab
    • Always use new plywood
Step 4
  • Lay DPM (damp proof membrane) onto ply deck with 300mm overlapped and taped joints
Step 5
  • Lay reinforcement mesh (if required) onto finished deck to appropriate cover
  • Use plastic spacers to ensure mesh is at the correct height
Step 6
  • Pour floating concrete slab or screed. Power float if required
  • Do not allow the concrete to spill over the lateral isolation by overfilling

Can be supplied as full sheets, cut to size pads and strips (including holes and slots if required) according to the customer’s requirements.

Typical Lead Time:

Stock: 2-3 working days
Non-Stock: 2-3 working weeks
Bespoke: 4-6 working weeks

*If cutting is required, add +5 days.

Coil Springs

Please contact us on +44 (0) 161 924 1600 for more information on our range of spring units

Thickness Thread(Bottom/top) Stock
20mm ISOMAT/Plain Non-Stock
25mm ISOMAT/Plain Stock
37mm ISOMAT/Plain Non-Stock

Farrat Floating Floors

  • Are used in a wide range of buildings to protect sensitive areas from noise sources or to contain noise sources within their areas
  • Offer flexibility in delivery as well as being easy, fast and economical to install
  • Provide a high degree of impact, shock and vibration control through a combination of mass addition and structural decoupling by constructing the floating slab on elastometric or coil spring isolators tuned to specific frequencies
  • Provide a high degree of airborne noise isolation through the incorporation of an air layer between the structural slab and the floating slab
  • Offer unparalleled flexibility in design, layout, acoustic and load carrying capacity
  • Are laboratory tested to national and international standards
  • Are supported by Farrat’s specialist team of structural and acoustic

Standards & Compliance

  • Elastomeric Compounds & Isolators
    Our compounds conform with the requirements and testing procedures set out in BS 6177:1982 and BS EN 1337-3:2005. 
  • Acoustic Testing
    Our acoustic floating floor systems have been laboratory tested in accordance with BS EN ISO 140-4 & 7:1998 in a UKAS accredited laboratory. Full test data is available on request.
  • Quality Assurance
    Farrat Isolevel Ltd operates an ISO 9001:2015 approved quality assurance system.
  • Sustainability
    Farrat takes sustainability and environmental responsibility very seriously. Before each project, we undertake a waste mitigation exercise to limit the amount of waste we generate by effective planning. We use FSC/PEFC certified timber (Breeam Tier 3) and recycled aggregates in our CEM II/III concrete (Breeam Tier 3) meaning we can ensure you have the ability to achieve the maximum amount of credits under Breeam MAT 03.

All of the materials we use in our floating floors are 100% recyclable.

For free technical advice, an onsite visit, specification details or a quotaion, call us now:

+44 (0) 161 924 1600

Or submit your enquiry below.

Enquiries & Quotations