Can I install underfloor heating myself?

The heating mat or cable can be laid by a competent DIYer, but the final electrical connection into a fused spur/consumer unit and RCD must be completed and certified by a qualified electrician in line with UK Part P and BS 7671.

What warranty do ThermoSphere products have?

All ThermoSphere heating cables, mats, membranes and foils carry a lifetime manufacturer warranty when installed to instructions. Thermostats and accessories carry a manufacturer warranty of 2–5 years depending on the model.

Is electric underfloor heating expensive to run?

Running cost depends on room size, insulation and thermostat schedule. For a well-insulated bathroom used 2 hours/day, running cost is typically 30–60p/day. A programmable or Wi-Fi thermostat with adaptive start is the single biggest saver.

Which floors are compatible with underfloor heating?

Tile and natural stone are ideal. LVT, vinyl, laminate and engineered wood are all compatible — check the manufacturer's max floor surface temperature (usually 27 °C). Solid wood and thick carpet with high tog underlay are generally not recommended.

Do you offer trade pricing on underfloor heating?

Yes — all listed prices are trade prices with lifetime warranty. For contract and larger-volume pricing, call our team and we'll quote based on system size and quantities.

Underfloor Heating

Electric Underfloor Heating —
Full ThermoSphere Range at Trade Prices

We're an approved ThermoSphere stockist carrying 60+ underfloor heating products — cables, mats, decoupling membranes, thermostats and insulation boards. Trade prices with lifetime manufacturer warranty on every system.

Approved Stockist
Lifetime Warranty
Up to 39% Below RRP
Next-Day Dispatch

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Why Choose ThermoSphere Underfloor Heating?

TwistedTwin® cable technology — even heat distribution
In-line hot-to-cold joint — no bulky connection boxes
Lifetime manufacturer warranty on all systems
Compatible with tile, stone, vinyl, laminate and wood floors

ThermoSphere Approved Stockist

Best-Selling Underfloor Heating Products

ThermoSphere

ThermoSphere Heating Foil Kit c/w Overlay & Underlay

In stock

Order today — dispatched next working day

1 m²

£65.00

inc VAT

ThermoSphere

ThermoSphere Flex Electric Combi Boiler 14kW

In stock

Order today — dispatched next working day

£1,427.99£3,324.00

inc VAT

A product bundle collage showing multiple automotive air filter and system components on a white background, including a Sentinel Vortex 250 magnetic filter, WRAS approved filling loop, Sentinel X300 system cleaner, automatic bypass valve, Sentinel X100 inhibitor, isolation valves, an EPH wireless combo control pack 4, and a Caleffi flow valve 5Ltr/min.

ThermoSphere

ThermoSphere Flex Electric Combi Boiler Installation Kit

In stock

Order today — dispatched next working day

£615.99£1,121.40

inc VAT

ThermoSphere

ThermoSphere Electric System Boiler Pump Timer Relay Kit (Large)

In stock

Order today — dispatched next working day

£155.99£263.28

inc VAT

ThermoSphere

ThermoSphere Electric System Boiler Pump

In stock

Order today — dispatched next working day

£365.99£624.77

inc VAT

ThermoSphere

Thermosphere Cold Tail Extension Cable 1mm (1m)

In stock

Order today — dispatched next working day

£3.96£6.94

inc VAT

All Underfloor Heating Products

Showing 12 of 32 products

ThermoSphere

ThermoSphere Heating Foil Kit c/w Overlay & Underlay

In stock

Order today — dispatched next working day

1 m²

£65.00

inc VAT

ThermoSphere

ThermoSphere Flex Electric Combi Boiler 14kW

In stock

Order today — dispatched next working day

£1,427.99£3,324.00

inc VAT

ThermoSphere

ThermoSphere Flex Electric Combi Boiler Installation Kit

In stock

Order today — dispatched next working day

£615.99£1,121.40

inc VAT

ThermoSphere

ThermoSphere Electric System Boiler Pump Timer Relay Kit (Large)

In stock

Order today — dispatched next working day

£155.99£263.28

inc VAT

ThermoSphere

ThermoSphere Electric System Boiler Pump

In stock

Order today — dispatched next working day

£365.99£624.77

inc VAT

ThermoSphere

Thermosphere Cold Tail Extension Cable 1mm (1m)

In stock

Order today — dispatched next working day

£3.96£6.94

inc VAT

ThermoSphere

Thermosphere Sensor Probe and Conduit Kit

In stock

Order today — dispatched next working day

£25.99£55.20

inc VAT

Two circular metallic flanges with multiple bolt holes, shown overlapping on a plain white background.

ThermoSphere

ThermoSphere Metal Washers Pk100

In stock

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£35.99£39.70

inc VAT

ThermoSphere

ThermoSphere Joint Tape 25m

In stock

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£20.99£34.40

inc VAT

Two silver metal screws with cross-shaped slotted heads, shown on a plain white background.

ThermoSphere

ThermoSphere Fixing Screws Pk1000

In stock

Order today — dispatched next working day

£36.99£41.02

inc VAT

ThermoSphere

ThermoSphere Timber Insulation Board

In stock

Order today — dispatched next working day

6mm

£25.99£29.11

inc VAT

A round, off-white foam disc with a small molded indentation in the center, shown against a plain white background.

ThermoSphere

ThermoSphere Perimeter Insulation Foam

In stock

Order today — dispatched next working day

£67.99£96.36

inc VAT

Underfloor Heating Buying Guide

Everything you need to spec the right electric underfloor heating for the job.

Heating cables suit irregular room shapes and let you space runs to hit a target watt/m². Heating mats are pre-spaced on a mesh backing and roll out fast in square/rectangular rooms — the quickest install for tile bathrooms and kitchens. Heating foils are ultra-thin and designed for floating floors (laminate, engineered wood, click LVT) where you don't want to raise floor height. Foils are not suitable under tile.

Underfloor Heating FAQs

Electric underfloor heating for a typical 4 m² bathroom starts around £120 for a heating mat and £60 for a thermostat. Larger open-plan areas of 15–25 m² typically cost £350–£700 for the heating system plus thermostat. Our systems are trade-priced up to 39% below RRP.

Shop Underfloor Heating by Type

Why Choose ThermoSphere Underfloor Heating?

Best-Selling Underfloor Heating Products

ThermoSphere Heating Foil Kit c/w Overlay & Underlay

ThermoSphere Flex Electric Combi Boiler 14kW

ThermoSphere Flex Electric Combi Boiler Installation Kit

ThermoSphere Electric System Boiler Pump Timer Relay Kit (Large)

ThermoSphere Electric System Boiler Pump

Thermosphere Cold Tail Extension Cable 1mm (1m)

All Underfloor Heating Products

Product results

ThermoSphere Heating Foil Kit c/w Overlay & Underlay

ThermoSphere Flex Electric Combi Boiler 14kW

ThermoSphere Flex Electric Combi Boiler Installation Kit

ThermoSphere Electric System Boiler Pump Timer Relay Kit (Large)

ThermoSphere Electric System Boiler Pump

Thermosphere Cold Tail Extension Cable 1mm (1m)

Thermosphere Sensor Probe and Conduit Kit

ThermoSphere Metal Washers Pk100

ThermoSphere Joint Tape 25m

ThermoSphere Fixing Screws Pk1000

ThermoSphere Timber Insulation Board

ThermoSphere Perimeter Insulation Foam

Underfloor Heating Buying Guide

Underfloor Heating FAQs

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