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CDM 503 Membrane

BBALogoCertNo-22_6357Newton CDM 503 is a BBA certified, high quality, 3mm cavity drain waterproofing membrane, for use within the Newton CDM System, our internally applied waterproofing system that also includes drainage and pumping systems.

CDM 503 is suitable for waterproofing earth retained walls and vaulted soffits and floors. It is guaranteed against deterioration for 30 years, with a life expectancy of the design life of the building (DIN 9001:2000), and supported by BBA Agrément Certificate 22/6357.

CDM 503 is inert and non-polluting to drinking water, highly resistant to water, alkalines, saline solutions and organic acids, and not affected by minerals and hydrocarbons. It is also rot-proof, and resistant to bacteria, fungi and small organisms.

  • Key Benefits
  • Typical Applications
  • British Standard 8102:2022
  • Technical Data
  • Available across the UK
  • Key Benefits

    Key Benefits

    • Does not require extensive and damaging preparation to the wall surface
    • Speed of installation
    • Capable of delivering an environment to all levels within a Grade 3 environment to BS 8102:2022
    • 3mm deep for applications where space is tightBES6001_Black

    Typical Applications

    Typical Applications

    Walls, floors, vaults, and tunnels as part of the Newton CDM System for below ground waterproofing applications.

    British Standard 8102:2022

    British Standard 8102:2022

    The British Standard 8102:2022 Code of Practice for Protection of Below Ground Structures Against Water Ingress is the main design guide for structural waterproofing in the UK.

    The Newton CDM System is a maintainable system, so complies with BS 8102 requirements. The standard also specifies that: “a waterproofing specialist should be included as part of the design team so that an integrated waterproofing is created”

    Therefore it is our recommendation that the Newton CDM System is installed by a Newton Specialist Contractor (NSBC).

    Technical Data

    Technical Data

    Features Result
    Material HDPE
    Unit weight 0.5 kg/m2
    Sheet thickness 0.6 mm
    Stud height 3 mm
    Colour White
    Water tightness @ 60 kPa; 24h Pass
    Working temperature -50 to 80°C
    Softening temperature 126°C
    Tensile strength MD 416 N
    Tensile strength CD  488 N
    Resistance to static loading > 20 kg
    Compressive strength  250 kN
    Reaction to fire Class F*
    Type of application  Type V
    Life expectancy Lifetime of structure


    The data, even if carried out according to regulated tests are indicative and they may change when specific site conditions vary. *Newton Waterproofing Systems can provide fire-resistant membranes that are tested and classified to a fire rating of B-s2.d0. Get in touch directly for more information.

    Available across the UK

    Available across the UK

    Cavity Drain Waterproofing Solutions Across the UK

    We provide cavity drain waterproofing products and solutions across the whole of the UK:

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    Our staff are able to provide guidance for projects of all sizes, whether you require some general advice about damp or waterproofing, or support with technical drawings and specifications.

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