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Bathroom, kitchen and wet-area waterproofing

Waterproofing

Bathroom, kitchen and wet-area waterproofing

Watertight wet areas with cementitious or hybrid membranes under tiles, including corner tapes, drains and pipe penetrations.

When do you need it?

  • Stains appear on the ceiling below a bathroom
  • A bathroom or kitchen is being renovated
  • A walk-in, level-access shower is planned
  • In multiple wet rooms of hotels, dormitories and hospitals

Layer build-up

Bathroom, kitchen and wet-area waterproofing
  1. 5Adhesive + tilesC2TE classView product →
  2. 4Flexible waterproofing (2 coats)Up to 2 m on shower wallsView product →
  3. 3Corner tapeWall–floor junctionsView product →
  4. 2PrimerEqualises absorptionView product →
  5. 1Screed / renderSound, sloped surface
Layers are listed bottom-up; details are finalised per project after survey.

Process

Step by step

  1. 01Survey and measurement

    Our technical team measures moisture on site, inspects existing layers and details, takes dimensions and photos.

  2. 02Plumbing test

    Supply and waste pipes are pressure-tested before finishes; leaks are fixed first.

  3. 03Details

    Drain collars, pipe penetrations and corners are prepared with tape.

  4. 04Waterproofing

    Two coats of flexible waterproofing are applied crosswise, taken higher on shower walls.

  5. 05Flood test

    A 24-hour flood test is performed and the room below checked.

  6. 06Inspection and handover

    At completion we carry out a water test or visual inspection and hand over a photo report and written warranty certificate.

Products in this system

FAQ

Can a bathroom be waterproofed without removing tiles?

If leaks are through joints, regrouting and a clear coating may help temporarily; a lasting fix needs waterproofing under the tiles.

How high should waterproofing go up the walls?

At least 15–20 cm in general areas and up to at least 2 m in the shower zone.

Why do a flood test?

It is the only reliable way to catch a defect before tiling; repairs after finishing cost far more.

Projects

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