Underfloor Heating Overlay Boards & Panels

Underfloor Heating Overlay Boards & Panels

Shop underfloor heating overlay boards, UFH panels, routed chipboard panels, dry screed overlay boards, cement boards, tile backer boards and low-profile underfloor heating boards at ThermRite Shop. Overlay boards are designed to hold underfloor heating pipe in position while helping transfer heat efficiently through the floor finish.

This collection includes HeatBoard routed chipboard panels, ThermRite PRO boards, solid floor tile-on panels, Profix and castellated panels, structural cement boards, routed dry screed boards, fibre cement cover boards, adhesives, screws and primers. Whether you are fitting water underfloor heating in a renovation, retrofit, extension, timber floor or low-profile floor build-up, our overlay board range offers practical solutions for trade and domestic installations.

Which Underfloor Heating Overlay Board Should I Choose?

Use the table below to compare the main overlay boards, routed panels and accessories available in this collection.

Product Type Best For What It Does Shop
HeatBoard ONE 22mm Grooved Chipboard Panel Joisted floors, timber floors and easy-lay chipboard floor deck installations. Grooved chipboard panels provide pipe channels and a stable floor deck for water UFH systems. View HeatBoard ONE
HeatBoard ONE MAX 2400x600mm Grooved Chipboard Panel Larger joisted floor areas where full-size 2400mm boards are preferred. All-in-one 22mm grooved chipboard panel with built-in turns for 12mm UFH pipe. View HeatBoard ONE MAX
HeatBoard ULTRA Grooved Chipboard with Aluminium Plates High-output joisted floor systems needing fast heat transfer. 22mm grooved chipboard panel with integrated aluminium heat-emitting trays. View HeatBoard ULTRA
ThermRite PRO 16mm Dual Purpose UFH Panel Low-profile retrofit projects requiring tile, wood or vinyl floor compatibility. EPS400 dual-purpose board with 200 micron foil for efficient heat transfer and flexible floor finish options. View 16mm PRO board
ThermRite PRO 20mm Dual Purpose UFH Panel Low-profile tile, vinyl, laminate or wood floor installations needing 16mm pipe. 20mm EPS400 foil-faced panel with secure pipe retention and 150mm pipe centres. View 20mm PRO board
ThermRite 18mm Floating Floor UFH Panel Floating wood and laminate floor finishes over existing screed or timber floors. Low-profile foil-faced EPS board for dry floating floor underfloor heating systems. View 18mm floating panel
ThermRite 25mm Floating Floor UFH Panel Floating wood and laminate floor finishes where a 25mm board is preferred. Foil-faced floating floor panel for efficient heat distribution without a wet screed. View 25mm floating panel
ThermRite 25mm XPS Tile-On UFH Panel Solid floors, low-profile UFH installations and tiled floor finishes. Rigid XPS underfloor heating panel designed for strength, insulation and tile floor build-ups. View 25mm tile-on panel
Profix 15mm UFH Panel Low-build retrofit systems using 12mm pipe at 150mm centres. Low-profile panel designed for high heat output and fast installation. View Profix 15mm
Profix PLUS 20mm UFH Panel Low-profile, high-output overlay systems using 16mm pipe. 20mm overlay panel designed for fast pipe retention and high thermal performance. View Profix PLUS
ProTile20 Cementitious Insulation Panel Tiled floors where direct tiling over the UFH panel is required. 20mm cementitious panel that accepts tile floors directly without extra overboarding. View ProTile20
Routed Dry Screed Overlay Board with Turns Dry screed UFH floors and tiled floor build-ups. Grooved cement board with built-in turns, designed for 12mm pipe at 150mm centres. View dry screed board
ThermRite 6mm Fibre Cement Cover Boards Covering HeatBoard ONE routed chipboard panels before tiling. High-strength, water-resistant cement fibre boards for tiled UFH floor finishes. View cover boards
6mm Tile Backer Board Electric or water UFH tile installations where insulation and board strength are needed. Backer boards support tiled floors and help reduce downward heat loss in floor heating systems. View tile backer board

Key Benefits of UFH Overlay Boards

Low-Profile Floor Build-Up Overlay boards are ideal for renovations and retrofits where floor height needs to be kept as low as possible.
Efficient Heat Transfer Foil-faced panels, routed boards and cementitious overlays help distribute heat evenly through the floor finish.
Pipe Retention & Layout Support Grooved and castellated panels hold pipe in place and help maintain correct spacing during installation.
Multiple Floor Finish Options Selected panels are suitable for tile, wood, vinyl, laminate or dry screed floor constructions when installed as specified.
Timber & Solid Floor Solutions Choose from routed chipboard panels for joisted floors, solid floor overlay panels, cement boards and tile backer boards.
Trade & Domestic Use Suitable for professional installers, contractors and homeowners fitting water underfloor heating in new or existing properties.

Overlay Boards, Routed Boards and Dry Screed Boards Explained

Underfloor heating overlay boards are used to install water UFH above an existing floor or deck without needing a traditional screed build-up. Routed boards include pre-cut channels for pipe, while dry screed and cement boards provide a strong, stable layer for floor finishes. The best board depends on the floor structure, pipe size, floor finish and available build-up height.

Board Type What It Does Best For
Routed Chipboard Panels Provide a floor deck with grooves for underfloor heating pipe. Joisted floors, timber floors and easy-lay UFH floor deck systems.
Foil-Faced Overlay Boards Help improve heat spread while keeping the floor build-up low. Retrofit projects, renovations and low-profile water UFH systems.
Dry Screed & Cement Boards Create a strong, stable overlay surface without a wet screed pour. Robust floors, tiled floor finishes and structural overlay systems.
Tile Backer Boards Provide a stable insulated base for tiled floor systems. Bathrooms, kitchens, tile installations and floor heating insulation layers.

Best Uses for Underfloor Heating Overlay Boards

Retrofit & Renovation Projects Overlay boards allow water underfloor heating to be added over existing floors with minimal disruption and reduced floor height build-up.
Joisted & Timber Floors Routed chipboard panels and structural boards can be used for timber floor constructions and joisted floor UFH layouts.
Tiled Floor Installations Cement boards, tile-on panels and backer boards provide stable substrates for tile, stone, slate and similar floor finishes.
Low-Profile UFH Systems Thin boards and panels are useful where door thresholds, ceiling heights or existing floor levels restrict available build-up.

Frequently Asked Questions

What are underfloor heating overlay boards? Underfloor heating overlay boards are panels used to install UFH pipe above an existing floor or deck. They normally include routed pipe channels, insulation, foil layers or structural board materials depending on the system type.
Are overlay boards suitable for retrofit underfloor heating? Yes, overlay boards are commonly used for retrofit and renovation projects because they allow water underfloor heating to be installed with a lower floor build-up than traditional screeded systems.
Can overlay boards be used with timber floors? Yes, selected routed chipboard panels, HeatBoard systems and structural overlay boards are designed for timber or joisted floor applications. Always choose the correct board for the floor structure and finish.
Can I tile directly over overlay boards? Some overlay boards and tile backer boards are designed to accept tiles when installed with the correct adhesive, primer and preparation. Always follow the product installation guidance for the chosen board and tile finish.
Which pipe size works with overlay boards? The required pipe size depends on the board design. Many low-profile systems use 12mm pipe, while other overlay or routed board systems are designed for 16mm pipe. Check the product specification before ordering.