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Straighten a crooked wall.

Smooth wall surfaces for an updated bathroom.

Wall application

Not every wall is a straight wall - as you will see when you renovate your bathroom. Qboard® will come to your rescue. The construction boards can be applied directly to old tiles or very uneven substrates.

Mounted in just a few steps, Qboard® provides a smooth surface that is suitable for all wall coverings from tiles or fillers to plaster.

Qboard® construction boards have a watertight XPS core, they protect walls from moisture penetration and therefore prevent mould forming.

... and here's how to do it:

Wandausgleich mit Qboard Bauplatten: Schritt 1

On uneven walls, the construction board must be fastened at appropriate points first. Please use tile or flexible adhesive for fastening.

Wandausgleich mit Qboard Bauplatten: Schritt 2

Attach the Qboard® basiq construction board to the wall so that an even, perpendicular and flush surface is created for further processing.

Wandausgleich mit Qboard Bauplatten: Schritt 3

Once the adhesive has set drill 8mm diameter holes so that you can fasten the construction board with Qboard® metal plugs later.

Wandausgleich mit Qboard Bauplatten: Schritt 4

Finally, all construction board joints must be coverd with Qboard® glass-fibre tape and filled with tile adhesive. Use Qboard® sealing tape for wet areas (e.g. showers).

List of Materials

Clad your walls easily with these Qboard® products.

  • Qboard® basiq
  • Qboard® Metal plugs
  • Qboard® Glass-fibre tape

Please refer to the list of materials under Downloads for the tools you will need.

Images & Videos

Questions & Answers

The core of the Qboard® consists of extruded polystyrene foam, a synthetic material that is waterproof, thermally insulating, light and very stable. This is coated in a fibreglass fabric and mortar so that tiles and other surface finishes can be applied directly to it.


Any conventional tools: knives, cutters, handsaws, electric jigsaws, electric circular saws or circular table saws. You can use sandpaper for precision work and if you need a hole, then just use a screwdriver.


Yes, it is possible to do so in principle, bearing in mind the application temperature limit for Qboard® construction boards, which is 75°C.

Lights above 50 Watt should be avoided.


Easily done

Qboard as substrate for tiles and plaster on the bathroom wall

This is how Jan did it:

Jan doesn't really like floor to ceiling tiles. So he worked with tiles and plaster. The substrate is Qboard® construction boards which he was able to apply his finishes to directly.

Tips & Tricks