• Stack of gray XPS tile backer insulation boards with a blueish hue of polystyrene foam on the edges, measuring 1200mm by 600mm
  • The depiction of tile backer boards sticking down through washers and screws
  • Tile backer board layered down under the electric underfloor heating mat
  • a closeup image of tile backer boards with materials information
  • a 3d model demo of usage of tile backer boards in bathroom
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Tile Backer Boards | Waterproof Insulation Panels for Walls & Floors – 6mm, 10mm, 12mm, 20mm

Tile Backer Boards | Waterproof Insulation Panels for Walls & Floors – 6mm, 10mm, 12mm, 20mm

£8.45 GBP
£8.99 GBP £8.45 GBP
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Description:

Tiling onto the wrong base is one of the most common (and expensive) mistakes in a bathroom or wet room renovation. Standard plasterboard or bare masonry can trap moisture, and over time that means mould, crumbling grout, and tiles that eventually come loose.

Our XPS tile backer boards remove that risk entirely. The closed-cell extruded polystyrene core is fully waterproof, so it won't absorb moisture, swell, or break down in high-humidity environments like showers and wet rooms. A reinforced cementitious coating sits on top, giving the board the strength to carry heavy tiles without adding unnecessary weight or bulk to your walls and floors.

Because the boards are also excellent thermal insulators, they're a natural fit for underfloor heating installations too — helping to retain heat and improve energy efficiency, not just waterproof the surface.

With four thickness options (6mm, 10mm, 12mm, and 20mm), you can match the board to the job: thinner panels for wall applications and tile backer builds, thicker panels for floors, uneven surfaces, or added insulation value. Every board is quick to score, snap, or cut with a standard utility knife, so fitting is straightforward whether you're a professional installer or tackling the renovation yourself.

Specifications:

 Specification Detail
Product type Waterproof tile backer / insulation board
Core material Extruded Polystyrene (XPS)
Surface finish Cement-coated reinforcement
Panel dimensions 1200mm x 600mm
Available thicknesses 6mm, 10mm, 12mm, 20mm
Water resistance Excellent — closed-cell, waterproof core
Compressive strength High — suitable for heavy tiles
Thermal performance Improves insulation, reduces heat loss
Recommended uses Wet rooms, bathrooms, underfloor heating, uneven surfaces, partition walls

 


  

Features

  • Core material: Extruded Polystyrene (XPS) — waterproof, closed-cell structure
  • Surface reinforcement: Cement-coated finish for added strength and durability
  • Panel size: 1200mm x 600mm
  • Thickness options: 6mm, 10mm, 12mm, 20mm
  • High compressive strength — suitable for heavy wall and floor tiles
  • Dimensionally stable — resists warping, swelling, and movement over time
  • Thermally efficient — reduces heat loss, ideal for underfloor heating systems
  • Easy to cut — score, snap, or cut with a standard utility knife

Key Benefits

  • Built for wet environments — closed-cell XPS core is fully waterproof, preventing mould, rot, and moisture damage in bathrooms and wet rooms.
  • Strong enough for heavy tiles — the reinforced cement coating supports large-format and heavy tiles without cracking or flexing.
  • Lightweight and easy to handle — despite its strength, the board stays light enough for one person to lift, cut, and fit.
  • Better heat retention — the XPS core adds thermal insulation, making it ideal for underfloor heating projects.
  • A choice of thicknesses — 6mm, 10mm, 12mm, and 20mm options cover walls, floors, uneven surfaces, and insulation upgrades.
  • Fast, simple installation — score, snap, or cut with a utility knife; no specialist tools required.

FAQ's

Q: What thickness should I choose?
A: Thinner boards (6mm–10mm) are typically used for walls, while thicker boards (12mm–20mm) suit floors, uneven surfaces, or projects where extra insulation is needed. If you're unsure, check your project's height allowance and tile weight before ordering.

Q: Can I use these boards with underfloor heating?
A: Yes. The XPS core provides thermal insulation that helps retain heat and improve the efficiency of underfloor heating systems, in addition to giving you a stable tiling surface.

Q: Are these boards fully waterproof?
A: Yes. The closed-cell extruded polystyrene core does not absorb water, making the boards suitable for showers, wet rooms, and other high-moisture areas.

Q: How do I cut the boards to size?
A: They can be scored and snapped, or cut cleanly with a standard utility knife — no specialist tools are needed.

Q: What tile types can I use on top?
A: The reinforced surface is designed to support heavy wall and floor tiles, including large-format tiles, once properly fixed and adhered.

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  • Why Customers Love It

    "A game changer for easy tiling." Customers highlight how much simpler tiling becomes with a flat, stable, waterproof base to work from — and how confident it makes them feel about long-term water tightness.

    Genuinely easy to work with. Reviewers across different thicknesses — from 6mm to 20mm — consistently describe the boards as straightforward to cut and fit, even for first-time renovators.

    Reliable for real bathroom projects. From full wet room installs to smaller bathroom upgrades, customers report a solid, professional-feeling finish once tiled.

    Quick to arrive, no fuss. Fast delivery and accurate orders come up repeatedly in feedback — useful when you're working to a renovation deadline.

Ready to Get Started?

Give your next tiling project a base that's built to last.Waterproof, strong, and available in the thickness your project needs — these XPS tile backer boards make wet room and bathroom tiling faster, safer, and more reliable from the first fix to the final grout line.

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