100 32mm XPS Tile Backer Board Washers

Each board measures 1200 × 600mm and covers an area of 0.72m². The boards are available in 6mm and 12mm thicknesses.

Divide the total area in square metres by 0.72 to estimate the number of boards required. Round the result up to the next whole board and allow approximately 10% extra for cuts and waste.

For example, a 10m² area requires:

10 ÷ 0.72 = 13.89 boards

Round this up to 14 boards before adding any allowance for waste.

The 6mm board is commonly used for overboarding suitable existing walls and floors where a low build-up is required.

The 12mm board provides additional thickness, rigidity and thermal insulation. It may be used for suitable wall and floor applications where a thicker board is appropriate.

The correct thickness depends on the substrate, fixing method, required build-up and intended installation.

The XPS core has low water absorption, but the boards should not be treated as a complete waterproofing system by themselves.

In showers, wet rooms and other directly wetted areas, all board joints, corners, fixings and service penetrations must be sealed with a suitable waterproof tape or tanking system.

Yes, they can be used as part of a correctly designed and installed waterproofing system. The board joints, internal and external corners, fixing points and pipe penetrations must be properly sealed.

Yes. They can provide a stable background for tiling on suitable internal bathroom walls when installed using the correct adhesive and/or mechanical fixing method for the substrate.

Yes, in suitable internal floor installations. The boards must be fully supported and correctly fixed to a sound, stable substrate.

The boards will not compensate for a weak, loose or excessively flexible floor. The complete floor construction must be suitable for tiling.

The fixing method depends on the substrate and application. Installation may require a suitable tile adhesive, mechanical fixings with backer-board screws and washers, or a combination of both.

Fixing type, quantity and spacing should be selected according to the substrate and installation specification.

Mechanical fixings may be required depending on the substrate and installation method. When mechanical fixing is specified, use suitable corrosion-resistant backer-board screws with appropriate fixing washers.

Do not assume that adhesive alone or mechanical fixings alone will be appropriate for every installation.

In directly wetted areas, mechanical fixing points should be sealed as part of the waterproofing system. Board joints, corners and service penetrations must also be treated correctly.

Yes, where required by the installation or waterproofing specification. In wet areas, joints should be sealed using a suitable waterproof tape or tanking-system component.

For other tiled applications, joints should be treated according to the board, adhesive and installation requirements.

Yes. The XPS core makes the boards considerably easier to handle and cut than many heavier cement-based sheet materials.

The XPS core has low thermal conductivity and provides useful insulation beneath a tiled finish. The overall thermal performance depends on the board thickness and the complete wall or floor construction.