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The Solution for
Masonry Party Walls

Isover RD Party Wall Roll is a cost effective acoustic insulation used to reduce the passage of sound across a masonry party wall.

Available in 75mm, 100mm, 125mm and 150mm thicknesses, the strong, resilient and flexible rolls are ready-cut to 2x455mm to fit between standard wall tie spacing.

Tested and Approved

Designed to exceed the requirements of Building Regulations (England & Wales) Approved Document (AD) E and (Scotland) Technical Standard Section 5.

Isover RD Party Wall Roll meets the full requirement to deliver zero U-value for party walls as defined in Building Regulations (Approved Document L1A, Table 3).

New more cost effective separating wall solution

Isover proprietary Robust Detail specifications E-WM-17 and E-WM-20 have been updated. They now include a lighter Gypsum board (8kg/m2) for a more cost effective solution, while still maintaining the +5dB performance.

Why RD Party Wall Roll?

  • Excellent acoustic performance

    Helps reduce unwanted noise between linked properties when used as part of a Robust Detail construction.

  • Robust Detail compliant

    Proprietary component of three Robust Detail constructions (E-WM-17, E-WM-20 and E-WM-24) and conforms to the generic full-fill mineral wool specification.

  • Thermal bypass solution

    Meets the requirement to deliver a zero U-value for party walls as defined in Building Regulations (Approved Document L1A, Table 3).

  • Non-combustible

    Isover RD Party Wall Roll has an A1 Euroclass fire rating – the best attainable.

  • Saves time and cost

    When used as part of a Robust Detail solution removes the need for costly pre-completion testing.

  • Recycled content

    Manufactured from up to 86% recycled glass.


Below you will find information on specifications, acoustic solutions & building regulations for England, Scotland and Wales.

If you cannot find the information you require, including advice on acoustic calculations, alternate products or other compliance issues, please contact our Technical Advice Centre on 0115 945 1143 or email

Look out for NEW Packaging

We’ve changed our packaging to make picking and selecting easier. RD Party Wall Roll is one of many Isover products available in the new colour coded packaging.

For further advice on choosing the right acoustic system for your building, contact the Technical Advice Centre service

Call us on 0115 945 1143
Email us at

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