ThermoSphere Ultimate Underfloor Heating Loose Lay Cables

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  • Unique Twisted Twin heating cable technology
  • Longer lasting superior heating cable
  • Cable measures 3.2mm thick
  • Easy install with the ThermoSphere Underfloor Heating Membrane
  • The choice of professional UFH installers
From £37.68 inc. VAT
From £31.40 exc. VAT

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When you need reliability, fit ThermoSphere Ultimate® heating cable!

The only underfloor heating cable to combine TwistedTwin cable, and in-line joint technology in one award winning package (2023 Flooring Innovation Winner).

When installing electric underfloor heating, you hope never to go back. ThermoSphere Ultimate® is quick and easy to install, plus it’s the most reliable underfloor heating cable on the market. That’s because ThermoSphere Ultimate combines a TwistedTwin cable, and in-line joint technology. This removes the risk of damaging the cable during installation, as cutting into the membrane and substrate is no longer required.

For total peace of mind

With guaranteed reliability there's little to no chance of the cable failing when installed correctly. We’re so confident about this that should the underfloor heating system fail in the first twelve months of installation because of a manufacturing fault, we will not only replace the system, we'll also replace the floor covering too (available after confirmation of successful warranty registration). So, sit back and relax because we’ve got you covered.

Thermosphere ultimate underfloor heating cable installed in their membrane.
Thermosphere ultimate underfloor heating cable being installed in their membrane.

Speed up installation and reduce risk

Unlike most electric heating cables, there's no bulky hot/cold joint that needs cutting into the floor. This transforms installation into a one-step process, making it faster and easier while significantly reducing any chance of accidently damaging the cold tail joint during installation. No cutting also means the membrane’s waterproofing layer stays intact.

Use it with any membrane mat

ThermoSphere Ultimate is compatible with all decoupling membrane mats. This means you can use your preferred brand of decoupling mat with the easiest to install and most reliable heating cable.

Thermosphere ultimate underfloor heating cable can be used with any underfloor heating matting.
Thermosphere ultimate underfloor heating cable installed in their blue matting.

Take advantage of in-line joint and TwistedTwin technology

ThermoSphere Ultimate is the ONLY heating cable to combine in-line joint technology with TwistedTwin cable construction. This makes it the most robust 'in-line joint' heating cable you can use – giving quick quality workmanship for your customers.



Features and Benefits of the ThermoSphere Underfloor Heating Cable

  • Unique Twisted Twin heating cable technology
  • Cable measures 5.5mm thick
  • Slim-line cold tail joint 
  • Longer lasting cable superior to anything else on the market
  • Backed up by a ThermoSphere lifetime warranty
  • The choice of professional UFH installers
  • Quick and easy install with the ThermoSphere Underfloor Heating Membrane
  • Available in a range of lengths and sizes

ThermoSphere Heating Cable Chart

Stock Code Length (m) Area 130Wm2 Area 195Wm2 Output (W) Resistance (Ω)
TSCABLE-12 12 1.15 0.8 150 352.7
TSCABLE-18 18 1.73 1.15 225 235.1
TSCABLE-25 25 2.31 1.54 300 176.3
TSCABLE-31 31 2.88 1.92 375 141.1
TSCABLE-37 37 3.46 2.31 450 117.7
TSCABLE-50 50 4.62 3.08 600 88.2
TSCABLE-61 61 5.77 3.85 750 70.5
TSCABLE-75 75 6.92 4.62 900 58.8
TSCABLE-100 100 9.23 6.15 1200 44.1
TSCABLE-125 125 11.54 7.69 1500 35.3
TSCABLE-150 150 13.85 9.23 1800 29.4
TSCABLE-200 200 18.46 12.31 2400 22.0

What is ThermoSphere Ultimate

Our in-line joint membrane cables do not have bulky hot/cold joints that are created after the primary manufacturing process. They are the same thickness from the end termination to the cold tail that connects to the thermostat. This makes them stronger, more reliable, and easier to install.

Why is ThermoSphere Ultimate heating cable better?

Our in-line joint membrane cables make installation easier because installers don’t have to cut into the membrane, insulation board, or chase out concrete. Cutting and chasing also makes joints the most common point of failure during installation. Removing the bulky joint removes that risk too.

How easy is it to install ThermoSphere Ultimate?

Very. You can simply press the cable into the membrane mat, covering the whole of the heated area, and you’re done. Because there are no bulky joints or thicker cold tail cables, installation is a one-step process. The membrane and cable are automatically flush and ready for tiling.

What heating cable lengths are available?

There are four new cable lengths: 42m, 55m, 90m and 175m. But all the existing lengths will become in-line joint too, which means you’ll have a cable for every project.

Thermosphere environment

The environment is critically important not just now, but for generations to come. That's why for every electric underfloor heating mat and thermostat combination that we sell, ThermoSphere plant a tree to help reforestation and secure a greener future.

They aim to reduce plastic waste at their headquarters by 50%, re-use or recycle 100% of their cardboard and improve energy efficiency with continued investment in cleaner technologies including LED lighting and electric vehicles.

They recognise and accept their responsibility to be a good steward of the environment and to help achieve a state of sustainable development. In support of these responsibilities, we have established the following commitments:

  • Provide electrical heating systems and products that offer minimal environmental impact whenever possible
  • Comply with all applicable environmental legislation with an aim of exceeding compliance wherever practical and possible
  • Prevention of pollution in all its forms
  • Conservation of natural resources, including energy, through resource reduction, reuse and recycling wherever practicable
  • Conformance with Environment Agency licences
  • Continual environmental performance improvement through the involvement of all employees and the local communities

Delivery Times

Delivery times for all delivery services are Monday to Friday (excluding Bank Holidays) 8am - 6pm. A 'working day' is Monday to Friday, excluding bank holidays. Weekends and bank holidays do not count as working days.

Delivery Costs

For information on delivery costs, please visit the main Delivery page.

Delivery Damages

It's important that you indicate the damages on the delivery note when you sign for the goods. Notify The London Tile Company by calling our advice line on 0333 320 80 48 if there are any damages or irregularities to your order within 24 hours of delivery.

From £37.68 inc. VAT
From £31.40 exc. VAT

In Stock

Adding to basket… The item has been added
Bulk Discount

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