Underfloor Heating Cable 150w

£23.99£390.99 + VAT

Order In:

Get it: Tuesday 16th of August

  • FROM £23.99 + VAT
  • Dual Teflon Coating (non PVC)
  • IPX7 Waterproof Rating
  • Secondary Or Primary Heat
  • Suitable For Most Floors
  • HC Decoupling Compatible
  • Enhanced With XPS Insulation
  • Or Tile Backer Boards
  • Low Profile – Only 2mm Depth
  • Multiple Wire Sizes Available
  • Largest Wire In UK At 200lm
  • Free Technical Assistance
  • Lifetime Warranty
  • Next Day Delivery Service 
IMPORTANT! All our electric underfloor heating systems must be run via suitable 'Fused Spurs'. Please consult an electrician if in doubt.
LARGE AREAS: Multiple mats or cables can be combined to cover any sized area for sizes greater than 12sqm.
Insulation is especially important on concrete floors however we would highly recommend it in any situation. XPS Boards(Adhesive) or Tile Backer Boards(Screws & Washers)
SKU: RCAB-150W Categories: , , Tags: ,

150w/m2 Loose Wire Underfloor Heating Cable Kits

150w/m2 Roma loose cable is the most advanced heat wire available. Unlike the majority of outdated, cheaper PVC coated cables, the Roma loose wire is double insulated with a dual Teflon coating.

At 2mm thickness, they are the lowest profile heating element on the market. They are tougher and far easier to lay than the thicker PVC coated cables.

All Roma cables are rated at 12w per metre, providing 150w per sqm, when spaced 80mm. Our largest wire at 200m in length (the largest loose cable in the UK), would cover 16sqm when spaced at 80mm (150w) or 12sqm, when spaced at 60mm (200w).


The heating can be laid directly on to a wood or concrete floor. To aid efficiency and response, insulation should be installed, prior to any of our under floor heating systems being fitted. The importance of the insulation should not be underestimated, as it drastically reduces running costs and warm up time.

For ease of install and to prevent lateral movement of the final floor, the HC decoupling membrane can be supplied. Decoupling membranes should be used on old problematic floors, wood or concrete sub floors, when risk of movement is a factor.

Under Tiles or Stone, XPS insulation and final floor Tiles should be fixed with a flexible adhesive. We also supply a two part self levelling compound, used to embed the heating, before flooring is laid. Under Tiles & Stone, only a 3mm depth of self level or adhesive is required to embed the heating, before Tiling. R-Mats and R-Cabs, can be laid under any other floor, when embedded in a 10-12mm depth latex/self levelling compound (dependent on floor manufacturers recommendation).

Unsure what type of system you need?

Please give our technical team a call or email.

150W vs 200W Underfloor Heating - What is better for my project?

The key difference/benefit between 150w and 200w electric heating is the warm up time (the time it reaches the set temperature). Both options will use a similar amount of electricity in total, but the 200w wire option will get to the desired temperature quicker than the lower wattage option. The 200w option serves as a primary heat source better than 150w, especially in high heat loss areas like outhouses, conservatories or external colder rooms.

Please note, a 150w system can still be used as a primary / sole heat source, as long as over 80% of the available floor is covered. It is also vitally important that insulation is installed in this instance, to aid the response and efficiency of the heating. Without insulation, the lower wattage option may struggle to heat the room and floor.

The 150w option is potentially a better solution on larger areas when the heating is retro fitted (walls already plastered/rendered) and electrical supplies are already set in place. Up to 20sqm of 150w heating and  thermostat can be powered off a 13amp fuse supply (based on a 240v supply). The 200w option at 20sqm, would either need to be separated into 2 zones (2 thermostats) or would need to be powered off a 25amp or 40amp relay (dependent on heated area / electrical load).

Technical Support, Fitting and Warranty Information

For peace of mind, all our heating mats and loose cables are covered with our Lifetime Guarantee. We are here to assist and advise, before or after a purchase has been made. We can help determine the best solution and coverage of heating you require for any project. Our technical team have over 50 years combined knowledge and expertise in the installation and supply of electric heating. There is no question or query we wouldn't be able to answer.

In the unlikely event, the heating develops a fault after installation, we offer free technical support over the phone, to help determine how this is has been caused. If an onsite repair needs to be done, we have a specialist team who can locate and repair any faults under any floor. In most instances, repairs can usually be rectified with minimal disruption to your installation or daily routines. In essence, electric heating is very basic how it operates, with the only mechanical/moving parts of the kit being the thermostat controllers.

Therefore, when installed correctly, the recommended products are used and the heating signed off by a qualified electrician, your product is covered with our Limetime Guarantee. We are here to help, whatever the situation or query, 24/7 and 365 days a year.

The Roma Heating Team

Roma Heating Loose Wire Heating System Floor Build-up

Underfloor Loose Wire Features

  • 12w/lm output / Dual Core
  • IPX7 Waterproof Rating
  • Teflon insulated with earth shield heating element
  • Ultra thin & durable heating element with high thermal capacity
  • Supplied with fixing tape
  • Only 2mm thick 
  • Easy and quick to lay
  • Wire spacings will determine output/wattage per sqm
  • Lifetime warranty
  • Full fitting instructions
  • Technical Free Phone Help Line
  • Next working day delivery service (when ordered before 12pm)


Technical Specifications

  • Operating Voltage 230/240V - 50Hz
  • 12w/lm Wattage/Output
  • Double insulated Element
  • Earth connection
  • Fully sheathed and earthed elements
  • Mat width 0.5m (largest mat 16sqm / 0.5m x 32m)
  • 2.5m long cold / connection tails
  • 3mm long Floor sensor probe / 10k Ohms thermistor (supplied with all thermostats or purchased individually)
  • Cable depth 2mm


Highly Recommended With This System

Roma Heating Underfloor Heating Design Service
At Roma Heating we offer a free design service to make the whole process a little easier.

If you would like a free quote or just a little more information please feel free to get in touch with us on 01803 316131.

Our time and advice is free and we can recommend the best underfloor heating system for you.

Additional information


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3 reviews for Underfloor Heating Cable 150w

  1. James Antap

    Pretty great post. I simply stumbled upon your blog and wished to say that I’ve really loved surfing around your weblog posts. After all I’ll be subscribing to your feed and I hope you write again very soon!

  2. Greg

    Iv’e got to say, I’ve used a few other product in my time. And this cable is really nice to work with. Thank you and I’m sure you will see me again.

  3. Sandra

    Brilliant! I love it you’ll find me lying face down on my tiles if you need me. ha ha

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