Monarfloor Wall Cap RDA2

Acoustic isolation and energy insulating system for separating party cavity walls within multi-rise developments.

Monarfloor® Wall Cap RDA2 isolates the load-bearing leaves from the separating floor, reducing the acoustic flanking sound transmission within the structure. Monarfloor Wall Cap RDA2 also ensures the integrity of acoustic treatments for party walls and floors. Whilst providing ‘effective edge sealing’ as required in approved document L1A of the building regulations (2010), SAP 2012 & Section 6 of the Scottish Building Standards. Monarfloor® Wall Cap RDA2 can be used in typical masonry, Timber, steel and concrete forms of construction.

Monarfloor® Wall Cap RDA2

Features & Benefits

  • Isolates the separating floor from the load bearing party wall.
  • Superior acoustic isolation performance.
  • Easily installed within current standard wall constructions. 
  • Specified within the Robust Details Handbook (Appendix A2) as of November 2011.
  • Provides ‘effective edge sealing’ as required to meet Approved Document L of the building regulations (2010) for party cavity walls, SAP (2012) & Section 5 of the Scottish Building Standards.
  • Reduces the flanking sound transmission energy within the structure.
  • Can be used as an isolator / innovative flanking detail with any acoustic flooring treatment.
  • Significantly improves the acoustic isolation of the building when used in conjunction with other Monarfloor® acoustic systems for party walls and floors.
  • Ensures the robustness of other acoustic systems for party walls and party floors.
  • 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 (England & Wales) & Section 5 of the Scottish building Standard.
  • Can be used to improve the acoustic performance and gain credits towards The Code for Sustainable Homes.
  • Product Range

    Product Code Description Dimension Weight (approx) Unit of Sale
    2004126 Monarfloor Wall Cap RD2A 400mm x 3.8mm x 8 lin m 23 Kg Per Box

    Note: Monarfloor Wall Cap RDA2 kit comprising 1 roll of Wall Cap RDA2 membrane and 30 Wall Cap RDA2 clips, 2 rolls of Wall Cap RDA2 quilt with 40 RDA2 ties.

  • Product Data & Performance

    Performance Data:
    Composition:   Wall Cap RDA2 Membrane – Bitumen composite with acoustically rated fillers and fire retardant.
    Wall Cap RDA2 Clips – Structural grade galvanised steel. RDA2 Quilt - Reconstituted polyetherpolyurethane.
    Sizes: Wall Cap RDA2 is supplied as a system kit and will work with all common UK cavity widths.
    The kit it supplied to suffice 8 linear meters of party wall.
    Weight/Kit: 23kg
  • Installation Guide


    Installation At A Glance (Masonry)

    • Build the load-bearing party walls to the desired height.
    • Locate Wall Cap RDA2 clips equally at approximately 600mm centres on both leaves along the length of the party cavity wall.
    • Roll Wall Cap RDA2 membrane over the full length of the prepared cavity wall, return the overhangs down the face of the masonry blocks and clip into the Wall Cap RDA2 clips.
    • For jointing, butt the Wall Cap RDA2 membrane tight and locate further Wall Cap RDA2 clips at these junctions.
    • Once the separating floor is fully installed, proceed to build the party and flanking walls.
    • All wall /floor junctions must be isolated in the same manner as the build continues upwards.
    • Wall Cap RDA2 membranes can be overlapped where necessary.
    • Continue to build the cavity wall.
    • Bed the first Tie in position within the mortar bed, close to start of the wall.
    • Continue bedding the Ties in at approx every 450mm centres.
    • Roll out the first layer of RDA2 Quilt in the cavity between the two floor planks ensuring that the bottom edge of the Quilt returns across the cavity and that the top edge of the Quilt covers the first block joint.
    • Fix the Quilt in position by pushing it onto the ties, ensuring it penetrates the Quilt.
    • Build the second course between the masonry leaves by repeating the above process.
    • Lock the Ties in position by pushing the Tie Locking Caps over the open ends, cut excess Tie flush with the Locking Cap.
    • Once Quilt is fully installed complete the build of the party wall.

    For optimum acoustic isolation, the party cavity wall should have Monarfloor® Wall Cap RDA2 built in at every storey and flanking walls isolated from the precast floor slab with Monarfloor Wall Cap 200 & Isolation Strips.

  • 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 RDA2 System (ICO2376)


    CAD Library

    download pdf Party Wall/Party Floor Detail - Wall Cap RDA2 (ICO2386)
  • 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