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Floor heating

Electric underfloor heating, explained

Electric underfloor heating uses a thin heating element within the floor build-up to warm the floor surface. This article explains how it works, the main types and what to think about before a project starts.

2 min read

A roll of carbon heating film on a floor before the floor finish is laid
Illustrative: carbon heating film before the floor finish is laid.

How it works

An electric heating element sits within the floor build-up. When it is switched on, it warms the floor, and the warm floor gives off radiant heat to the people and furnishings in the room.

The element is either a thin carbon film or a heating cable. Which one suits depends on the floor finish and how the floor is built. Controls are specified to suit the rooms and the project.

CBS works with electric heating only. It does not supply or install hydronic (water-based) heating, pipes or boilers.

Carbon film or heating cable?

The floor finish is usually the deciding factor:

Which electric floor heating suits which floor
FloorSystem usually considered
Floating timber or laminateCarbon film, laid dry within the floor build-up
Suitable carpetCarbon film, where the carpet and underlay suit a heated floor
New tiles on a screedUnder-tile heating cable in the screed
Tiles where height is limitedUltra-thin floor cable, where the floor finish suits it
New concrete slabIn-slab heating cable, fixed before the pour

Ron confirms the right system for your floor covering, underlay and subfloor before anything is ordered.

Is it safe?

Electric floor heating products are designed to be installed within a floor. Safety depends on the right product being specified for the floor, installed to the specification and connected by a licensed electrician, who also confirms the electrical requirements for your home.

CBS sets out those requirements in the quote, so your electrician has them before work starts.

What affects running costs?

There is no single running-cost figure for floor heating. It depends on:

  • the size of the heated area and the output specified for it
  • how well the room and floor are insulated
  • your electricity tariff
  • how the system is controlled and used

Ron can explain the specified output for your rooms in the quote.

Before you start

A few details make the first conversation with Ron much quicker:

  • the rooms you want to heat and their approximate sizes
  • the floor finish you plan to use, and its maker if known
  • the subfloor: concrete, timber or existing tiles
  • whether it is a new build, an extension or a renovation, and your timing
  • where fixed cabinetry will go, as heating is not placed under it

Talk to Ron

Talk to Ron about your project.

Call or email with the rooms, the finishes and your timing, or send the short enquiry form on the contact page.