18mm Solid-Floor Tile Direct System - 70M2

Compatible with most modern boilers, our solid-floor tile direct system kits are perfect for use on existing floors or where digging down is not an option.

The versatility of this efficient heating system is also beneficial, perfect for heating a work or domestic premises. Even better, everything you need is included in the underfloor heating kit.

For more options please visit the 'Kit Builder' section. 

Incl. Vat: £1,932.00 £1,610.00
Availability: In stock
SKU
sfs-018-70

18mm Solid Floor Tile Direct System - 70m²

The 18mm Solid Floor Tile Direct System - 70m² is designed for substantial tiled floor zones where dependable heat distribution and installation accuracy are critical. Supplied as a complete package, this system is engineered for direct fitting beneath tile finishes on solid subfloors, delivering controlled thermal performance across a 70m² area, and is tailored to professional installation standards.

When installing this Tile Direct system, you'll need a 5mm layer of self-levelling compound to be laid on top of the panels before tiles can be laid. This ensures optimal heat distribution and energy efficiency.

This 70m² underfloor heating solution includes the components specified for effective trade-level installation:

  • 18mm pre-grooved panels
  • 16mm underfloor heating pipework cut to cover 70m²
  • Precisely routed board channels to position pipework securely
  • Suitable for extensive open-plan living areas, kitchens, and main floors
  • Engineered to support consistent heat transfer through tiles

The 18mm Solid Floor Tile Direct System - 70m² delivers a complete underfloor heating package for larger solid floor-tiled applications. With purpose-matched boards and pipework engineered for uniform heat distribution and secure fitting, this system supports a structured installation process and trusted performance.

Order today to outfit your next project with a system built to meet professional requirements and deliver reliable thermal results.

Next Working Day Delivery

Applies to UK Mainland only. Order before 12:30pm Mon–Fri. Orders placed after 12:30pm Friday will arrive Tuesday. Saturday delivery is available at an extra cost.

Free delivery

UK Mainland orders over £250 (ex VAT). Larger or palletised orders outside UK Mainland may incur additional fees.

Additional Information

Deliveries are fulfilled by third-party couriers. Delivery times are estimates and we are not liable for delays. For detailed information about shipping, view our Shipping and Returns.

 
Item Qty
Novatherm Solid Floor Tile Direct Panels
•18mm x 1200mm x 600mm
98
“A” Rated Grundfos 15-50/60 Heat Pump 1
Novatherm 80m x 12mm Professional Grade MLCP Plastic Piping 6
Novatherm 6 Port Dualix Manifold, including: 1
Manifold Isolating Valves 2
Temperature Gauges 2
Lockshields with flow meters on each port
Drain/fill valves with blank cap 2
Automatic air vents 2
Metal fixing brackets 2
Heatmiser Digital Thermostat 1
12mm - 3/4 Pipe Connector Cores 12
Pipe Reaming Tool 1
 

 

-- Remove all contaminants, dirt, grease etc from the substrate and make dust free.
-- Loose lay the boards across the floor and number the boards on the upper face to identify position of each board, making sure the pipework runs are calculated correctly to reach manifold position.
-- Uplift the numbered boards and prime the underside of the boards with Ultra Floor Prime-IT MSP bonding primer. This should be applied by brush or roller in a thin film. Allow to thoroughly dry to a clear green film ensuring primed face does not come into contact with other boards, walls or subfloor until it is ready to be bedded.
- -Drying time will depend upon ambient conditions but is typically between 1 and 4 hours.
-- Whilst the primer on the boards is drying commence with priming of the substrate using UltraFloor Prime-IT MSP. The primer should be diluted 3 parts water to 1 part primer and allowed to fully dry.
-- Apply flexible tile adhesive to the subfloor using a notched trowel to give a minimum 3mm adhesive bed. Bed the boards, primed side down, into the adhesive and ensure compression of adhesive ridges, ensure full compression of the adhesive to give a void free full adhesive bed. Additional use of  screws and washers is recommended over timber substrates where needed, fixed at every 300mm. Allow to cure for approximately 4 hours to ensure the adhesive has gone through its initial set before carrying out any further works.
-- Pipe work may be fitted into the boards once they are all secure. Where possible this is best left until the following day. It is recommended that the pipe system is checked for leaks and correct water pressures prior to tiling over.
-- Prime the upper face of the boards with Ultra Prime-IT MSP bonding primer. This should be applied by brush or roller in a thin film. Allow to thoroughly dry to a clear green film, (approx 1-4 hours).
-- Apply Ultra Floor Level-iT 2 two part smoothing compound over entire floor area, making sure all voids and gaps are completely filled, the levelling compound should encapsulate the whole floor and cover the board with a 5mm layer on top.
-- Allow to cure for 24 hours prior to carrying out any tiling. Cold and/or humid atmospheres will delay the curing of Level-iT 2 so allowances should be made accordingly.
-- Prime the cured Level-iT 2 using Ultra Floor Prime-IT MSP diluted with 3 parts water to 1 part primer. Allow to thoroughly dry.

Frequently Asked Questions

How do I decide between 40m², 50m², 60m², 70m², or 80m² kits?
Measure your total heated floor area and choose a kit slightly above that figure to ensure complete coverage and flexibility in pipe layout.
What room size is the 18mm Solid Floor Tile Direct 70m² System suited for?
The 18mm Solid Floor Tile Direct 70m² System is designed to heat an area up to 70 square metres, so it’s well suited for a large open-plan spaces or several connected rooms with a combined area of around 70m². The kit comes with the pre-specified pipework and panel layout to ensure size match and efficiency.
Which types of floor finishes and sub-floor constructions can the 18mm Solid Floor Tile Direct 70m² System work with?
This 18mm system is a “tile direct” solution over a solid sub-floor, which means it’s best used where you have a concrete or screed base and intend to finish with tile or stone. With the 18mm insulation panels built for this application, the system ensures efficient heat transfer to the tile surface above while keeping build-up minimal.