Monarfloor Wall Cap - Lamatherm

Acoustic Isolation and Energy Insulating System for Separating Party Cavity Walls within Multi-Rise Attached Developments.

Monarfloor Wall Cap- Lamatherm® isolates both masonry leaves of the party wall from the flanking wall, reducing the acoustic flanking sound transmission within the structure. Monarfloor Wall Cap - Lamatherm also provides ‘effective edge sealing at the party wall – flanking wall junction to reduce the thermal convection.  The system also acts as the fire barrier for the party wall at this junction.

Lamatherm system 

Features & Benefits

  • Isolates the separating party cavity wall from the flanking wall.
  • Reduces the flanking sound transmission energy within the structure.
  • Superior acoustic isolation performance.
  • Can be used as an isolator / innovative flanking detail with any masonry party cavity walls.
  • Easily installed within current standard wall constructions.
  • Significantly improves the acoustic isolation of the building when used in conjunction with other Monarfloor® acoustic systems for party walls.
  • When used with other Monarfloor® systems, provides ‘effective edge sealing’ reducing the heat loss within the cavity and thus meeting the changes to Approved Document L1A of the Building Regulations for England and Wales.
  • Ensures the robustness of other acoustic systems for party walls.
  • Demonstrates a significant cost saving and flexibility in the design and build of the building.
  • Surpasses performance requirements of Approved Document E of the Building Regulations.
  • Can be used to improve the acoustic and thermal performance and gain credits towards The Code for Sustainable Homes or Home Quality Mark HQM.
  • One system to address acoustic and thermal performance requirements for new-build dwellings.
  • Product Range

    Product Code Description Dimension Weight (approx) Unit of Sale
    2003860 Monarfloor Wall Cap Lamatherm 85 85mm x 13.8m 22 Kg Per Box
    2004109 Monarfloor Wall Cap Lamatherm 90 90mm x 13.8m 23.5 Kg  Per Box
    2008361 Monarfloor Wall Cap Lamatherm 110 110mm x 13.8m 26 Kg  Per Box

    Note: Lamatherm kit comprising of 30 Wall Cap – Lamatherm Bats (400 x 460mm) and 34 Wall Cap clips.

  • Product Data & Performance

    Performance Data:
    Composition:   Wall Cap Lamatherm Bats – Bitumen composite with acoustically rated fillers and fire retardant.
    Wall Cap Clips – Structural grade galvanised steel.
    Sizes: Wall Cap Lamatherm Bats – 460mm long, 85mm, 90mm and 110mm widths to suit cavities 75-100mm.
    Wall Cap Clips – 15mm wide x 104.9mm long x 75mm deep.
  • Installation Guide

    Monarfloor® Wall Cap – Lamatherm: Detail at Party Wall/Flanking Wall Junction (Plan View).


    Monarfloor® Wall Cap – Lamatherm: Detail at Party Wall/Flanking Wall


    1 Seperating Party Cavity Wall   5 External Flanking Wall
    2 Monarfloor® Wall Cap Lamatherm   6 Monarfloor® Wall Cap Membrane
    3 External Flanking Wall   7 Monarfloor® Wall Cap Clips
    4 Lamatherm EW Acoustic Fire Stop      


    Installation At A Glance (Masonry)

    • Set out and build the party walls, sequence to suit the build but don’t bring through the flanking walls.
    • One the wall is constructed and dry, locate Wall Cap clips equally one to each block height, up the entire height of the party wall. This operation can be carried out as each lift is being built dependant on sequencing.
    • Insert the Wall Cap – Lamatherm, ensuring the mineral – wool bat is tight within the cavity.
    • Return the Wall Cap – Lamatherm membrane and locate within the Wall Cap clips.
    • Proceed with the next layer, ensuring the rebates within the mineral-wool are interlocked snuggly.
    • Butt flanking walls to the party walls and tie in with wall ties.
    • Once complete bring through the flanking walls and complete the build.
  • 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 Wall Cap Lamatherm (ICO2080)


    Installation Guides

    download pdf Wall Cap Lamatherm Installation Guide (ICO2086)


    CAD Library

    download pdf Wall Cap System within a typical party & flanking wall (ICO2034)


    CE - Declarations of Performance

    download pdf Monarfloor Bridgestop Acoustic Membrane DoP (TDS1187)
  • 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