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Oldroyd Xs

Oldroyd Xs is a tough polypropylene cavity drainage membrane embossed with an 'X' pattern of grooves. These grooves allow moisture to move behind the membrane and allow for shrinkage movement when screeds are laid on top.

The most common application is over damp concrete floors not subject to hydrostatic pressure. A wide choice of flooring types can then be laid on top, e.g. screeds, particleboard, laminated wooden flooring. Insulation can also be used in conjunction with the system.

To be applied by a suitably qualified contractor.

Other applications for Oldroyd Xs include:

  • Fast track installation of floor finishes over new floor slabs.
  • Waterproofing beneath slabs.
  • Radon and ground gas protection.

Joint laps:

Overlap of three 'domes'; sealed with Oldroyd double sided jointing tape.

General information

Uniclass 2015

Pr_25_57_51_74 Rubber studded sheetsPrimary


J40/290 High density polyethylene/ polypropylene studded cavity drain membrane

Specification data - Rubber studded sheets

Product Reference

Oldroyd Xs

Joint sealant

Oldroyd double sided sealing tape

Oldroyd double sided sealing tape; joint overlaid with 200 mm Oldroyd overseal tape

For membrane used as part of a ground gas protection system.

Standard product features




  • Membrane: 0.5 mm.
  • Stud height: 1.5 mm.

Compressive strength:

>1000 kN/m².

Product Options

Joint sealants:

  • Oldroyd sealing tape: Double sided butyl tape, 30 mm wide.
  • Oldroyd overseal tape: For sealing flange joints, 200 mm wide.

Third party certifications
  • 00/3733
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