Description
The 6mm NoMorePly Cement Coated XPS Board 1200 x 600mm (4′ x 2′) is a lightweight insulated tile backer from NoMorePly, a UK brand by STS Ltd. The board has a high-performance extruded polystyrene (XPS) foam core with a thin cement coating (around 1mm on each side) that includes a glass fibre mesh embedded in a polymer-cement mortar. What you get is foam-level insulation paired with a solid surface that’s ready to tile straight onto.
Pick one up, and the low weight stands out straight away. A full 1200 x 600mm sheet weighs just 1.5 kg. Cutting is just as simple: a stanley knife scores and snaps the board cleanly.
- Built for tiled solid floors with underfloor heating
The 6mm version is specifically designed for overboarding solid floors before tiling, and is the natural choice when you’re installing electric underfloor heating on top of concrete or screed. Because the XPS core blocks heat loss into the floor below, warmth from the cables is pushed upwards into the room rather than soaked into the slab. On top of that, the cement coating is built to cope safely with both the heat and the chemicals found in the sheathing around heating elements.
Because the foam doesn’t conduct heat, it covers up cold bridging coming from the substrate underneath and helps cut down on condensation handy in unheated bathrooms or cloakrooms sitting on cold concrete.
- Insulation and load figures
The XPS foam core has a thermal conductivity of 0.034 W/mK, with an R-value of 0.18 (m²·K)/W for the 6mm board. Despite being so light, the cement-coated surface handles tile loads of up to 62 kg/m², which covers most ceramic and porcelain floor tiles including large-format ones. Compressive strength is at least 0.3 N/mm², and the foam absorbs just 0.2% water by volume over a 2-day immersion test, with zero capillary absorption.
- Waterproof and made for wet areas
The whole board is 100% moisture resistant, making it suitable for kitchens, bathrooms, wetrooms, shower bases and any tiled area where water is a factor. Unlike plywood, it doesn’t weaken when damp. The cement coating resists impact, holds tiles firmly, and accepts standard single-part flexible cementitious tile adhesives.
Applications
- Overboarding solid floors before tiling
- Insulation layer under electric underfloor heating on solid floors
- Tile substrate for floors in kitchens, bathrooms and wetrooms
- Reducing condensation on cold concrete floors
When installed using the NoMorePly system (Mega Strength adhesive plus stainless steel screws and washers where needed), the board is covered by a manufacturer’s lifetime guarantee.
The board is CE and UKCA marked.
