Monarfloor Impact 18 - RDL FFT4 Resilient overlay platform floor / floating floor system.

A platform floor / floating floor overlay system designed for use over a levelling screed. When installed as part of a complete sound reduction system it enables a concrete floor to meet the sound transmission regulations of Part E.

Monarfloor Impact 18 is a composite tongue and groove flooring system consisting of an 8mm layer of LRAC foam bonded with a high performance water based adhesive to 18mm moisture V313 P5 chipboard. Monarfloor Deck 18 may be used over 18mm chipboard, OSB board or a decking ply sub floor.

Monarfloor Impact 18 System - Applications for existing & new concrete floors

Features & Benefits

  • Applications for existing & new concrete floors.
  • Supports floor loadings as defined in BS EN 1991-1-1:2002 +A1 2010 (Eurocode 1) which stipulates floor loading of 2 kN.
  • Flame retardant.
  • FFT4 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
    3003307 Monarfloor Impact 18 26mm x 600mm x 2400mm 22.2 Kg Per Sheet
  • Product Data and Performance

    Performance Data:
    Composition: 8mm layer of LRAC foam bonded with a high performance water based adhesive to 18mm V313 P5 chipboard.
    Board Size: 2400mm x 600mm
    Thickness: 26mm
    Board Weight: 22.20kg (nominal)
    Weight/m² 15.42kg (nominal)
    DnT,w: 58dB
    DnT,w + Ctr: Complies with Robust Details Ref E-FC-1; E-FC-2 and E-FS-1
    L’nT,w: 56dB

    Performance based on PCT test evidence

    Integration With Underfloor Heating:
    Application: Floating Floor.
    Subfloor: Concrete 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® Impact 18 over 65mm sand/cement screed and 150mm precast concrete plank (Robust Details E-FC-1 with FFT4/FFT5 Floating Floor).


    1 Monarfloor® Flanking Band – reduces impact vibration transmission via party and flanking walls and assists in reducing airborne sound paths.
    2 Monarfloor® Impact 18 system.
    3 150mm hollow core plank with 65mm sand cement screed.


    Installation at a glance

    • Flank all perimeter with Monarfloor® Flanking Band.
    • Lay Monarfloor® Impact 18 platform floor / floating floor 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 Impact 18 platform floor / floating floor system (ICO2043)


    Installation Guides

    download pdf Monarfloor Impact 18 Deck Overlay System Installation Guide (ICO2083)
  • 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


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Monarfloor Acoustic Flanking & Acoustic Floating Floor Systems