01732 360 095

CDM 508 Membrane

BBALogoCertNo-22_6357Newton CDM 508 is a high quality cavity drain waterproofing membrane, supplied in a number of sizes and in 500g/m2 and 700g/m2 variants for use within the Newton CDM System, our internally applied waterproofing system that also includes drainage and pumping systems.

CDM 508 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 508 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
  • BS 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 a Grade 3 internal environment as per BS 8102:2022 where appropriate ventilation for the use of the space is also implemented

    Newton CDM 508 Membrane is available in the following variants:

    • CDM 508 700g/m² (Code M1-7-48): 2.4m x 20m – 48m²
    • CDM 508 700g/m² (Code M1-7-40): 2m x 20m – 40m²
    • CDM 508 500g/m² (Code M1-5-48): 2.4m x 20m – 48m²
    • CDM 508 500g/m² (Code M1-5-40): 2m x 20m – 40m²


    Typical Applications

    Typical Applications

    As part of the Newton CDM System for below ground waterproofing applications.

    • Walls
    • Floors (700g/m2 variants only)
    • Vaults
    • Tunnels


    • Concrete
    • Brick
    • Concrete block
    • ICF – With special longer fixing plugs


    • Concrete raft or slab
    • Newton Fibran XPS 500-C closed cell extruded polystyrene insulation


    • Concrete – To fall
    • Brick – Arched or vaulted

    BS 8102:2022

    BS 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
    Colour White
    Density 500g/m² / 700g/m²
    Width 2.0m / 2.4m
    Length 20m
    Area 40m² / 48m²
    Height 8.0mm
    Membrane thickness 0.45mm
    Stud Height 7.0mm
    Working temperature -50ºC to +80ºC
    Softening temperature 126ºC
    Packaged weight 20 / 24 / 28 / 33.6 kg
    Service temperature -40ºC to +80ºC





    Installed Performance Result
    Water tightness at 60 kPa; 24h Pass
    Tensile strength MD 416N
    Tensile strength CD 488N
    Resistance to static loading >20kg
    Compressive strength 180kN
    Fire resistance E*
    Type of application Type V
    Life expectancy Lifetime of Structure

    The above 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:

    Speak to our friendly, expert team

    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.

      By submitting your details you confirm that you agree to the storing and processing of your personal data by Newton Waterproofing as described in the privacy statement.

      Bank Holiday - We will be closed on Monday 27th reopening on Tuesday 28th May