JUTA X8 CDM is an 8mm thick studded cavity drainage membrane, suitable for type C waterproofing in accordance with BS 8102;2009, to provide a grade 3 environment.

Read More

Product Benefits

  • Typically used in basement walls and floors, internal damp proofing and waterproofing, vaults and tunnels.
  • Complies with the latest codes of practice as published by BS, BRE and CIRIA.
Product Description

Suitable for installing onto all types of concrete/stone/masonry floor slabs capable of withstanding anticipated floor loadings.

ShapeRectangular - Supplied in roll form.
Size2 x 20 m x 20 mm
Warranty Description60 year
Uniclass 2015 Pr_25_57_51_74 Rubber studded sheets
CAWSJ40/47 High density polyethylene/ polypropylene studded cavity drain membrane
J40/290 High density polyethylene/ polypropylene studded cavity drain membrane
StandardTo BS 8102, Grade 3.
Stud height 7 mm.
Sheet thickness 0.45 mm.
Weight (minimum) 0.5 kg/m2.
Performance characteristics
Fire performance To EN 13501-1, Class E.
Recycled content 0%.
Product Reference JUTA Cavity Drain
CharacteristicsTest MethodX8 CDM
Working TemperatureN/A- 50oC to +80oC
Softening temperatureN/A126oC
Tensile Strength (MD)EN I12311-2416 N
Tensile Strength (CMD)EN I12311-2488 N
Resistance to Static LoadingEN 12730> 20 kg
Compressive StrengthEN ISO 25619-2180 kN
Reaction to fireEN 13501-1Class E
Life ExpectancyN/ALifetime of Structure
CharacteristicsTest MethodX8 CDM
Water Tightness (60 kPA)EN 1928PASS
In plane flow capacityEN ISO 129589.01 l/s/m width i = 1.0 @ 20 kPa
CharacteristicsTest MethodX8 CDM
Unit WeightEN 1849-20.5 kg/m2
Sheet ThicknessEN 1849-20.45 mm
Stud HeightEN 1849-27.0 mm
Roll Width2.00 m
Roll Length20 m
Gross roll weight20 kg
Coverage40 m2

X8 CDM drainage membrane should be rolled out stud down and trimmed to the perimeter walls and overlapped onto the adjacent strip by two stud overlaps sealed with a line of GP® TAPE.

Refer to full installation guidelines available from our Technical Department.


A selection of standard details for information and education purposes only. Note - it is strongly advised appropriately qualified, and insured personnel undertake gas membrane installs. A gas membrane performs a critical function in the application setting and has an anticipated design service life in excess of 60 years. Do not attempt to install gas membranes from these details alone. Sole rights for use and distribution are owned by JUTA UK LTD.

BBA Logo
CE Mark
BSI Kitemark
BS 8102:2009

BIM objects are digital descriptions of products or materials that, when combined with other BIM objects create a Building Information Model. These downloadable files can be used for these purposes.

Download from NBS National BIM Library
Site Investigation
Site Investigation
Site Investigation Reports Monitoring Results. We review these reports and advise routes for compliance.
System Design
System Design
Full Ground Gas Protection System Design available.
Wide library of standard details with site specific details on request.
All our installers are certified NVQ Level 2 qualified installation contractors.
We ensure your project complies with the relevant building regulations.

Juta Solutions & Applications

Our waterproofing membranes and structures suit a variety of applications and situations, with our TITAN® range offering not only superior waterproofing qualities but also offering invasive weed control and gas protection.

Get In Touch With The Experts

If you feel first class service, premium products direct from source, and bespoke solutions are right for you then don't hesitate to contact our team today on 01772 754177 or email us at [email protected]

Contact Us