UFH ROUTED FLOOR BOARDS

DryBloc® HeatFlow 18

18mm CNC Routed Board for Wet Underfloor Heating – Fast, Durable, and Precise Pipe Installation

DryBloc® HeatFlow CNC Routed Board is a high-performance fibre cement board designed for effortless wet underfloor heating (UFH) installation, ideal for applications including 12mm pipework systems, concrete and timber floors, wet rooms, bathroom renovations, and tiled flooring projects.

Pre-Routed Fibre Cement Boards Designed for Effortless 12mm UFH Pipe Installation and Superior Thermal Performance

Description

The CEMBLOC® DryBloc® HeatFlow is a CNC Routed Board is a high-performance fibre cement solution engineered specifically for wet underfloor heating (UFH) systems. Each board features precisely CNC-routed grooves to securely house 12mm UFH pipework, ensuring consistent alignment, faster installation, and optimal heat distribution. Designed to simplify both residential and commercial UFH projects, these boards significantly reduce installation time compared to traditional pipe-fixing methods while maintaining a professional finish.


Manufactured from high-density fibre cement, the DryBloc® HeatFlow UFH board is exceptionally durable, moisture-resistant, and thermally stable, making it suitable for wet rooms, bathrooms, kitchens, utility areas, and any space requiring reliable underfloor heating. Its 18mm thickness and 1200x600mm dimensions offer the perfect balance between rigidity and ease of handling, while pre-routed grooves prevent pipe movement and ensure long-term performance of the heating system.


This board is compatible with concrete screeds, timber joist floors, and hybrid flooring systems, making it versatile for new builds, renovations, and refurbishments. Beyond underfloor heating, it also supports tiled, wooden, or laminate flooring, providing a stable and moisture-resistant base. Whether used in domestic properties, commercial offices, hotels, gyms, or wellness centres, DryBloc® HeatFlow Wet UFH CNC Routed Boards deliver efficient heat transfer, robust construction, and ease of installation, making them the ideal solution for modern UFH flooring systems.


Priming is required after laying and pipe installation to protect pipes and optimise screed adhesion


Our professional team are here to help you with any questions.

A green shield that says non-combustible and euroclass

Key Features


Standard Sizes

Thicknesses: 18mm

Dimensions: 1200mm x 600mm

Fire Performance

A1 Fire Class


Side Profile

Flat edge


Span

N/A - Overlay board only.

Support for Your Project

Have a technical advisor get in touch to discuss your needs and work out a suitable, effective solution for you. Get a quote, our experts are here to help you find the best solution for your project. Call us today: +44 (0) 208 050 5302 or send an email to support@cembloc.com

Advantages Of Use.

  • CNC-routed grooves for precise 12mm wet UFH pipe placement
  • High-density fibre cement for superior durability and strength
  • 18mm thickness, compatible with standard UFH screed applications
  • 1200x600mm size, lightweight and easy to handle on-site
  • Moisture-resistant, suitable for wet areas and high-humidity environments
  • Fire-resistant, providing additional safety in residential and commercial spaces
  • Compatible with concrete screeds, timber joist floors, and hybrid systems
  • Reduces installation time compared to traditional pipe-fixing methods
  • Prevents pipe movement and ensures even heat distribution
  • Long-lasting performance in both new-build and renovation projects


Areas Of Use.

  • Residential projects: bathrooms, kitchens, utility rooms, conservatories
  • Commercial spaces: offices, hotels, gyms, wellness centers
  • New-build flooring systems where UFH is required
  • Renovations and refurbishments requiring quick UFH integration
  • Concrete screed floors
  • Timber joist floors
  • Wet rooms and areas with high moisture levels
  • Underfloor heating in combination with tiled or wooden floors

Downloads

A row of black buttons with pink icons on them.

Common DryBloc TG4 Questions

  • Can I Use Plywood Instead?

    No. Under British Standards BS 5385 Part 1, plywood is not a suitable substrate for the direct fixing of wall tiles, therefore when tiling onto walls, a tile backer board is required. However, tiling onto plywood overlaid floors is acceptable under British Standards. 


  • Do I need to use CemBond on the DryBloc TG4?

    Yes, CemBond Max Strength Sealant/Adhesive is necessary for all Cembloc installation guides to protect and adhere the boards in place.


  • Which way round do I lay DryBloc TG4?

    DryBloc TG4 boards should be laid with the UFH side up

  • What Is DryBloc TG4 made of?

    DryBloc TG4 is a fibre cement boards made from organic fibre, sand, cement, and water. The mixture of these ingredients is critical to produce a strong, firm, water-resistant board suitable for heavy tiles and moisture.


  • Benefits of DryBloc TG4 vs Chipboard?

    There are several reasons why fibre cement flooring may be a better choice than chipboard for flooring applications. Fibre cement is a more durable and long-lasting material than chipboard, making it unlikely to warp, crack, or break over time. It is also resistant to weathering, rot, and insect damage, making it a better choice for outdoor or wet environments. Fibre cement is also non-combustible and can be used in fire-rated applications, whereas chipboard is combustible and should not be used in fire-resistant construction. Fibre cement flooring is also available in a wider range of colours, textures, and styles, giving you more design options to choose from. Overall, fibre cement is a more versatile, durable, and reliable material for flooring than chipboard.


  • Do I need to Prime?

    Priming required after laying and pipe installation to protect pipes and optimize screed adhesion


  • How do I cut DryBloc boards?

    The use of a Polycrystalline blade is always recommended to speed up the process and efficiency.


  • What glue do I use with DryBloc TG4?

    We recommend using CemBond Max Strength Sealant/Adhesive along with Cembloc FCB screws when installing DryBloc TG4.