Monarfloor Deck 9 - Acoustic deck / floating floor overlay system

RDL FFT5 Resilient overlay shallow platform floor / floating floor system.

The simplest way of improving the airborne and impact sound performance of an existing floor is to overlay the floor with an acoustic isolation layer and a new hard wearing surface.

Monarfloor Deck 9 is an acoustic deck overlay system designed to reduce sound transmission through existing timber or new concrete floors in situations where the increase in floor height has to be kept to a minimum, once installed Deck 9 increases the floor level by only 17mm.

Monarfloor Deck 9 is comprised of a 8mm layer of LRAC foam bonded with a high performance water based adhesive to 9mm moisture resistant tongue and grooved MDF. Monarfloor Deck 9 may be used over 18mm chipboard, OSB board, a decking ply or concrete sub-floor.

When installed as part of a complete sound reduction system it enables a timber or concrete floor to meet the performance of Approved Document E of the Building Regulations & Section 5. of the Scottish Standards.

Monarfloor Deck 9 RDL FFT5 Resilient overlay shallow platform acoustic floor system

Features & Benefits

  • Supports floor loadings as defined in BS EN 1991-1-1:2002 +A1 2010 (Eurocode 1) which stipulates floor loading of 2 kN.
  • Shallow floating floor – superior reduction of impact transmission.
  • Flame retardant.
  • Applications for new build & conversion.
  • FFT5 Resilient Shallow Platform Floor / Floating Floor.
  • Complies with Robust Detail - E-FC-1; E-FC-2.
  • Product Range

    Product Code Description Dimension Weight (approx) Unit of Sale
    3003306 Monarfloor Deck 9 17mm x 600mm x 1200mm 5.1 Kg Per Sheet
  • Product Data and Performance

    Performance Data:
    Composition: 8mm layer of LRAC foam bonded with a high performance water based adhesive to 9mm moisture resistant MDF.
    Board Size: 1200mm x 600mm
    Thickness: 17mm
    Board Weight: 5.10kg (nominal)
    Weight/m² 6.40kg (nominal)
    DnT,w: 57dB
    DnT,w + Ctr: 48dB
    L’nT,w: 48dB

    Performance based on PCT test evidence

    Integration With Underfloor Heating:
    Application: Floating Floor.
    Subfloor: Timber Deck
    Underfloor Heating System: Electric Mat
    Application: Lay over chipboard deck, then apply floor finish
    Effect on heating performance: None
    Notes: For Monarfloor Floating Floor Treatments, Underfloor Heating Systems should be laid over the Acoustic Floating Floor.

    Monarfloor LRAC foam's for most densities has a thermal conductivity of 0.034 W/mK.

    Any Electric Underfloor Heating System must comply with the BSI 17th Edition IEE Wiring Regulations.

    All Underfloor Heating Systems must be installed in accordance with the manufacturers details.

    Any Underfloor Heating System detail must follow Monarfloor's guidance.
  • Installation Guide

    Monarfloor® Deck 9 platform floor / floating floor (FFT5) system on a timber sub-floor with a resilient bar system.


    1 Acoustic Flanking Band – reduces impact vibration transmission via party and flanking walls and assists in reducing airborne sound paths.
    2 100mm 45kg/m³ insulation.
    3 22kg/m² double boarded ceiling on resilient bars perpendicular to joist direction
    4 Monarfloor® Deck 9 system on existing timber floor (subject to condition) or new 18mm chipboard deck on 200 x 50mm timber joists.

    Installation at a glance

    • Flank all perimeter with Monarfloor® Flanking Band.
    • Level the sub-floor to the required tolerance.
    • Lay Monarfloor® Deck 9 platform floor / floating floor (FFT5) system over existing sub-floor in a broken bond pattern, applying Monarfloor® Adhesive to all tongue and groove panel joints.
    • Install skirting and trim off excess Flanking Band.
  • Downloads - Datasheets & Product Information Sheets

    On this page you can download our information and documentation in one place. Click on any of the acrobat icons below and the brochure will start to download.


    download pdf Monarfloor Acoustic Systems - Product Guide (ICO2833)
    download pdf Monarfloor Acoustic Systems - Product Guide - Republic of Ireland & Northern Ireland - (ICO3036)
    download pdf  Monarfloor Acoustic Systems - Mini Guide (ICO2833)
    download pdf Monarfloor Acoustic Systems - Price List
    download pdf Monarfloor 4 Credits Solutions (ICO1890)


    Product Information Sheets

    download pdf Monarfloor Deck 9 platform floor / floating floor FFT5 system (ICO2035)


    Installation Guides

    download pdf Monarfloor Deck 9, Deck 18 & Deck 22 - Acoustic Deck Overlay System Installation Guide (ICO2082)


    Test Reports & Assessments

    download pdf BBA Certificate 99/3600 Monarfloor 9, 18 and 22 Acoustic Deck System
  • Related Products

  • Contact Us - Technical & Specification Support - CPD's

    Icopal Monarfloor has a dedicated field service, with a network of technical advisers throughout the UK & Ireland, available to provide technical support and bespoke specifications to meet your exact project requirements.

    Our advisory service for specifiers and contractors is free of charge. Our technical advisers are available at any time during working hours to answer queries on any aspect of building acoustics design.

    Click here to find a local Icopal Technical Adviser

    Click here to request a bespoke specification for your project 

    Want to know everything about soundproofing?
    Our CPD seminars provide an insight into the world of acoustics and more.

    Click here to find out more about the CPD's available

    Alternatively our head office technical support team can be contacted on:

    0161 865 4444


Contact Us

To discuss your project in more detail please;

Contact your local area manager
Want to know everything about soundproofing?
Book a Monarfloor Acoustics CPD

Or contact us

Technical Support


0330 123 4585



Sales Enquiries & Orders


0843 224 7400


0843 224 7401


This site uses cookies in accordance with our Website Privacy Policy. By continuing to browse the site you are agreeing to our use of cookies. To browse without the use of cookies, you can opt-out as explained in our Website Privacy Policy or adjust your cookie settings for your browser

Monarfloor Acoustic Flanking & Acoustic Floating Floor Systems