Delta MS20 Membrane (2m x 20m) – Cavity Drain Membrane

: £282.33
£268.09 £321.71

Delta MS 20 is a High Capacity Wall and Floor Waterproof Membrane.

2.0m x 20m – 40m2 Roll – 20mm Stud Height.

With superior drainage capacity and compressive strength, this waterproof and vapour proof membrane is used as part of a Type C waterproofing system.

This premium quality cavity drain membrane has a 20mm stud profile to deal effectively with water ingress and provide a high capacity drainage void.

Delta MS20 comes in a 40m2 roll, making it great value for waterproofing basement floors and walls.

Delta MS20 has a maximum load capacity of 150kn/m2 meaning. This means that it can support the weight of dry lining, most blockwork walls as well as plant equipment.

Uses of Delta MS20:

Delta MS20 is primarily used in basement waterproofing for new build and refurbishment projects.

It’s also used to provide cavity drainage waterproofing to tunnel and civil engineering projects where a high drainage capacity is required.

Delta MS20 is used for example:

  • to waterproof basement and cellar floors and slabs subject to water ingress,
  • as a waterproofing membrane in areas subject to vibration,
  • in listed or historic buildings where a reversible waterproofing system is required.

Our Guide for the installation of Cavity Drainage Membranes is here.


Delta MS20 is installed stud side facing the floor. Joints in the Delta MS20 are sealed using Delta Tape and Delta Corner Strip – you can buy both with us too.

Delta MS20 is usually used horizontally, but can be used vertically too where high levels of water ingress are expected – for example tunnels.

Preparation varies depending on application. Full installation instructions are provided and available to download.

Delta Membranes Product Code DMS 009


Weight 40 kg
Dimensions 20 × 2 × 20 cm

BBA Certificate Delta MS20

2 reviews for Delta MS20 Membrane (2m x 20m) – Cavity Drain Membrane

  1. Michael Jones

    Good product for basement floors. Really sturdy.

  2. Tim Wilson

    Top quality membrane. Thick material. Quite heavy but I suppose that’s a sign of quality. Used this on lots of basement and never had a problem.

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