• A blue XPS grooved insulation board
  • An infographic installation guide for GBHome XPS Grooved Underfloor Heating Insulation Board, showing step-by-step installation instructions, technical cross-sections, and product benefits.
  • Installation of pipes on xps grooved boards
  • Xps grooved boards
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GBHOME

25mm Grooved Insulation Board - Routed Overlay Board for Underfloor Heating - 1200x600mm - 16mm Pipe Size

25mm Grooved Insulation Board - Routed Overlay Board for Underfloor Heating - 1200x600mm - 16mm Pipe Size

£10.99 GBP
£11.99 GBP £10.99 GBP
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XPS300 grooved insulation boards 1200x600x25mm 16mmPipe, 150mm Gaps - Specialized insulation panels designed for underfloor  water heating systems.  

  1. Extruded Polystyrene (XPS): The core material of XPS with a Kpa of 300, offers excellent thermal insulation properties, providing an effective barrier to minimize heat loss from the underfloor heating system.

  2. Grooved Design: The top surface of the insulation boards features grooves that are designed to securely hold the underfloor heating pipes in place. The grooves are specifically sized to accommodate pipes with a diameter of 16mm with 150mm gaps between.

  3. Thermal Efficiency: XPS grooved insulation boards enhance the thermal efficiency of the underfloor heating system. By providing insulation and reducing heat loss, they help maximize the heat output into the room, resulting in improved energy efficiency and comfort.

  4. Easy Installation: These insulation boards are typically lightweight and easy to handle, simplifying the installation process. The grooves in the boards provide a secure and stable surface for positioning and securing the underfloor heating pipes.

  5. Compatibility with Different Floor Finishes: XPS grooved insulation boards can be used with various floor finishes, tiles, laminate and engineered wood can be laid directly on top without the need to screed over first, They provide a smooth and level surface for the floor covering to be installed.

Also Available With Aluminium Coating 


Features

  • Material: Extruded Polystyrene (XPS), 300 kPa compressive strength
  • Grooved top surface designed to house and secure underfloor heating pipes
  • Pipe compatibility: 16mm diameter pipe
  • Groove spacing: 150mm gaps between channels
  • Lightweight construction for easy handling, cutting, and installation
  • Direct floor-finish compatibility — no screed layer needed for tile, laminate, or engineered wood
  • Rigid, flat panel providing a stable, level base for floor coverings

Key Benefits

  • Lower energy bills — high-density XPS core minimises downward heat loss, so more heat reaches the room instead of the subfloor.
  • Faster installation — pre-formed grooves hold pipes in place instantly, cutting labour time and eliminating separate pipe-fixing steps.

  • Consistent, reliable pipe spacing — 150mm gaps are built into the board, so heat output is even across the whole floor.
  • Built to last — 300 kPa compressive strength means the board resists crushing under foot traffic, furniture, and floor finishes.
  • Warmer floors, faster response — improved thermal efficiency means your system reaches target temperature quicker and holds it more consistently.

FAQ's

Q: What pipe size are these boards designed for?
A: These boards are grooved specifically for 16mm underfloor heating pipe, with 150mm spacing between channels.

Q: Can I lay tile or laminate directly onto the board?
A: Yes. The rigid, flat surface is designed to take tile, laminate, or engineered wood flooring directly, without needing to screed over the top first.

Q: How thick is the board, and what size does it cover?
A: Each board is 25mm thick and measures 1200mm x 600mm, making it easy to calculate coverage for larger rooms.

Q: Why choose XPS300 over standard insulation?
A: The 300 kPa compressive strength gives the board the rigidity to support foot traffic, furniture, and flooring loads without crushing or deforming over time — something lower-grade insulation can't guarantee.

Q: Is this suitable for DIY installation?
A: Yes. The boards are lightweight, easy to cut, and the pre-formed grooves make pipe placement straightforward — though checking your heating system's design specification beforehand is recommended.

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