Underfloor heating brings warmth into the house and can be used in conjunction with radiators keeping the entire home at an ambient temperature or might be used instead of radiators, being the only heat source for your home. Under floor heating can be installed as an electric system or a wet gas system connected to your boiler. 

Electric underfloor heating relies on electrical cables to generate heat. Wet gas under floor heating are pipes connected to the boiler and relies on a pump, to pump water through the heating circuit, bringing warmth to the room.

How does underfloor heating warm a room?

Regardless of whether you have a wet under floor heating circuit or an electrical under floor heating circuit, they both are made up of coils which transfer heat to the floor.

An electric under floor circuit works with the electricity heating the wire mats. The wire mats that are underneath the floor surface naturally warm up from the transfer of heat.

For a wet under floor heating circuit that a gas engineer would install, an underfloor that is connected to the gas boiler, can be an extended part of the central heating radiator system. The water pumping through the system is heated by the boiler, and this hot water flows through the pipes of the under floor heating, which then transfer heat to the floor surface.

Floor materials that work the best with underfloor heating are stone and tile. Carpet works with a low thermal resistance underlay and the carpet should have a hessian back for efficiency. Wood is not as effective, thinner wood is better than solid wood which might need the system running a month before any noticeable difference.

Does under floor heating replace radiators?

This depends on the energy efficiency of your home. If your home is well insulated and generally a warmer house (or a newbuild), then you can enjoy more space in each room by removing radiators from the walls and replacing the heating with underfloor heating.

Most UK homes tend to rely on a combination of radiators and underfloor heating (UFH). Under floor heating can take a gradual time to warm up a room (warming from the bottom up) and it is not as hot as the heat being distributed out of a radiator. The under floor heating will however deliver the heat more evenly in every room. This is because under the floor is a set of loops of heating running along the entire floor surface of a room. A radiator is fixed to a wall in one section of the room, making that part of the room by the radiator naturally hotter than the rest of the room. Also, as underfloor heating cannot be installed underneath thick wooden floors, it would not be suitable to completely remove all radiators and only have UFH. For a comfortable cosy winter period, the best is to have both; underfloor heating circuit and radiators. 

How much will it cost to fit underfloor heating?

The cost of fitting underfloor heating is dependent on how big a floor space will be having under floor hoses and if the installation is a retrofit or part of a new refurbishment. On average the cost for fitting under floor heating, will work out as £125 per square metre for a refurbishment or for a retro fit, £145 per square metre. The installation cost is about 50% labour and 50% of the cost is the materials

A gas heating engineer will be able to retrofit an underfloor heating to a living room in one to two days of labour time (whether the system is being screeded into the floor or not). The engineer will install the manifold first which the loops of the underfloor heating are connected to, before then laying the loops (also known as hoses). If the entire 3 bed house is being renovated with wet underfloor heating fitted, this could be 5 - 7 days labour for the gas engineer. If the system is being retrofitted, then allow for a few days extra of labour charges for the extra time needed accessing where the hoses will be fitted.

Cost to fit underfloor heating 

Per

Average total labour cost

Fitting underfloor heating in a bathroom refurbishment

Per day

£230

Fit underfloor heating on the ground floor of a 3 bed refurbishment

Per day

£620

Install underfloor heating on both floors of a 3 bed

Per day

£900

Clean rust out of the underfloor heating circuit on a ground floor

Per day

£350

Replace a faulty isolation valve on the manifold of an underfloor heating system

Per hour

£90

Which is better; gas or electric under floor heating?

Both wet and electric under floor heating come with their own set of advantages.

Electric underfloor heating is easier to retrofit and when it comes to small spaces like a bathroom, it is cheaper to install. The underfloor heating mats are thin so they do not add much height difference to the floor.

A water underfloor gas heating is cheaper to run than the electric heating and when you are doing a house refurbishment, they are generally cheaper to install as well. Wet systems can be a smart underfloor system being controlled remotely from your phone to keep them more energy efficient as they are better when heating up large rooms like a basement area or a living room.

What to consider when getting underfloor heating?

Underfloor heating suits almost any age, size or condition of a property. If you are considering fitting under floor heating, consider the floor space that you would like heated. Is this just going to be in wet rooms like bathrooms? 

Or will you want the entire downstairs on the under floor heating circuit.

What is the current floor surface, if old carpets / laminate / vinyl, will they be compatible with under floor heating and do you need to re carpet / laminate / vinyl with a new thermal resistant underlay?

What is the thermal energy efficiency of your home? if not too great, then underfloor heating will need to work with radiators on the walls and will not be able to replace the radiators.

Most importantly, speak to the gas heating engineer to find out the cost of installing a wet water under floor heating system versus the cost of an electrician installing an electric dry system and decide which system would be overall cheaper to install and run in your home.


Estimates for common heating engineer jobs;

Job Estimate
Cost to replace a hot water immersion heater £275
Cost to fit underfloor heating £250
Cost to replace a vented hot water cylinder £330
Cost to replace a heating programmer £180
Cost to powerflush a central heating system £500 Visit
New combi or system boiler installation – like for like replacement £500
Cost to install a ground source heat pump £3750
Cost to fix a boiler fault error code £85
Cost to replace an unvented hot water cylinder, e.g., Megaflo £305
Cost to fit thermostatic radiator valves (TRVs) £94
Cost to fit smart heating controls £100
Cost to fit a radiator £80
Boiler service cost £90
Boiler repair costs (e.g. pump, diverter valve or heat exchanger) £333
Cost to install an air source heat pump £556
Replacement of a vented system £580

Rates for other trades

Fit underfloor heating cost in the UK
Fit underfloor heating cost in the UK (excluding VAT or callout charges)
Location in UKFit underfloor heating cost
Fit underfloor heating near Aberdeen£280
Fit underfloor heating near Amber Valley£240
Fit underfloor heating near Angus£270
Fit underfloor heating near Arun£273
Fit underfloor heating near Ashfield£238
Fit underfloor heating near Aylesbury Vale£281
Fit underfloor heating near Barnsley£233
Fit underfloor heating near Basildon£264
Fit underfloor heating near Basingstoke & Deane£273
Fit underfloor heating near Bassetlaw£245
Fit underfloor heating near Bath & North East Somerset£260
Fit underfloor heating near Bedford£280
Fit underfloor heating near Belfast£212
Fit underfloor heating near Birmingham£232
Fit underfloor heating near Blackburn£237
Fit underfloor heating near Blackpool£243
Fit underfloor heating near Bolton£248
Fit underfloor heating near Bournemouth£271
Fit underfloor heating near Bracknell Forest£287
Fit underfloor heating near Bradford£234
Fit underfloor heating near Braintree£258
Fit underfloor heating near Breckland£242
Fit underfloor heating near Bridgend£226
Fit underfloor heating near Brighton£264
Fit underfloor heating near Bristol£253
Fit underfloor heating near Broadland£267
Fit underfloor heating near Broxtowe£237
Fit underfloor heating near Bury£245
Fit underfloor heating near Caerphilly£226
Fit underfloor heating near Calderdale£230
Fit underfloor heating near Cambridge£275
Fit underfloor heating near Canterbury£245
Fit underfloor heating near Cardiff£232
Fit underfloor heating near Carmarthenshire£199
Fit underfloor heating near Charnwood£230
Fit underfloor heating near Chelmsford£259
Fit underfloor heating near Cheltenham£310
Fit underfloor heating near Cherwell£277
Fit underfloor heating near Chester£219
Fit underfloor heating near Colchester£255
Fit underfloor heating near Conway£204
Fit underfloor heating near Coventry£233
Fit underfloor heating near Crewe & Nantwich£234
Fit underfloor heating near Dacorum£280
Fit underfloor heating near Derby£230
Fit underfloor heating near Doncaster£244
Fit underfloor heating near Dover£234
Fit underfloor heating near Dudley£233
Fit underfloor heating near Dumfries & Galloway£252
Fit underfloor heating near Dundee£274
Fit underfloor heating near East Ayrshire£190
Fit underfloor heating near East Devon£247
Fit underfloor heating near East Dunbartonshire£284
Fit underfloor heating near East Hampshire£269
Fit underfloor heating near East Hertfordshire£277
Fit underfloor heating near East Lindsey£219
Fit underfloor heating near East Riding£196
Fit underfloor heating near Eastleigh£280
Fit underfloor heating near Edinburgh£256
Fit underfloor heating near Elmbridge£292
Fit underfloor heating near Epping Forest£293
Fit underfloor heating near Erewash£233
Fit underfloor heating near Exeter£257
Fit underfloor heating near Falkirk£275
Fit underfloor heating near Fife£261
Fit underfloor heating near Flintshire£226
Fit underfloor heating near Gateshead£260
Fit underfloor heating near Gedling£235
Fit underfloor heating near Glasgow£279
Fit underfloor heating near Gloucester£322
Fit underfloor heating near Guildford£296
Fit underfloor heating near Gwynedd£232
Fit underfloor heating near Halton£236
Fit underfloor heating near Harrogate£224
Fit underfloor heating near Havant & Waterloo£266
Fit underfloor heating near Highland£320
Fit underfloor heating near Horsham£268
Fit underfloor heating near Huntingdonshire£271
Fit underfloor heating near Ipswich£303
Fit underfloor heating near Isle of Wight£262
Fit underfloor heating near Kings Lynn & West Norfolk£260
Fit underfloor heating near Kingston-upon-Hull£196
Fit underfloor heating near Kirklees£228
Fit underfloor heating near Knowsley£232
Fit underfloor heating near Lancaster£257
Fit underfloor heating near Leeds£227
Fit underfloor heating near Leicester£232
Fit underfloor heating near Lisburn£211
Fit underfloor heating near Liverpool£231
Fit underfloor heating near London£289
Fit underfloor heating near Luton£287
Fit underfloor heating near Macclesfield£242
Fit underfloor heating near Maidstone£255
Fit underfloor heating near Manchester£239
Fit underfloor heating near Mid Bedfordshire£278
Fit underfloor heating near Mid Sussex£274
Fit underfloor heating near Middlesbrough£244
Fit underfloor heating near Milton Keynes£281
Fit underfloor heating near Neath Port Talbot£234
Fit underfloor heating near New Forest£269
Fit underfloor heating near Newbury£274
Fit underfloor heating near Newcastle-under-Lyme£223
Fit underfloor heating near Newcastle-upon-Tyne£261
Fit underfloor heating near Newport£233
Fit underfloor heating near North Ayrshire£224
Fit underfloor heating near North East Lincolnshire£254
Fit underfloor heating near North Hertfordshire£280
Fit underfloor heating near North Lanarkshire£280
Fit underfloor heating near North Lincolnshire£221
Fit underfloor heating near North Somerset£248
Fit underfloor heating near North Tyneside£259
Fit underfloor heating near North Wiltshire£310
Fit underfloor heating near Northampton£272
Fit underfloor heating near Norwich£260
Fit underfloor heating near Nottingham£230
Fit underfloor heating near Nuneaton & Bedworth£230
Fit underfloor heating near Oldham£242
Fit underfloor heating near Oxford£281
Fit underfloor heating near Pembrokeshire£204
Fit underfloor heating near Perth & Kinross£270
Fit underfloor heating near Peterborough£274
Fit underfloor heating near Plymouth£246
Fit underfloor heating near Poole£270
Fit underfloor heating near Portsmouth£263
Fit underfloor heating near Powys£308
Fit underfloor heating near Preston£246
Fit underfloor heating near Reading£288
Fit underfloor heating near Redcar & Cleveland£235
Fit underfloor heating near Reigate & Banstead£291
Fit underfloor heating near Renfrewshire£267
Fit underfloor heating near Rhondda, Cynon, Taff£215
Fit underfloor heating near Rochdale£242
Fit underfloor heating near Rochester-upon-Medway£280
Fit underfloor heating near Rotherham£237
Fit underfloor heating near Salford£239
Fit underfloor heating near Salisbury£251
Fit underfloor heating near Sandwell£231
Fit underfloor heating near Scarborough£242
Fit underfloor heating near Scottish Borders£370
Fit underfloor heating near Sefton£231
Fit underfloor heating near Sevenoaks£267
Fit underfloor heating near Sheffield£242
Fit underfloor heating near Slough£289
Fit underfloor heating near Solihull£232
Fit underfloor heating near South Ayrshire£227
Fit underfloor heating near South Bedfordshire£280
Fit underfloor heating near South Cambridgeshire£265
Fit underfloor heating near South Gloucestershire£257
Fit underfloor heating near South Kesteven£272
Fit underfloor heating near South Lanarkshire£276
Fit underfloor heating near South Oxfordshire£274
Fit underfloor heating near South Somerset£263
Fit underfloor heating near South Tyneside£259
Fit underfloor heating near Southampton£277
Fit underfloor heating near Southend-on-Sea£255
Fit underfloor heating near St Albans£290
Fit underfloor heating near St Helens£231
Fit underfloor heating near Stafford£236
Fit underfloor heating near Stockport£241
Fit underfloor heating near Stockton-on-Tees£246
Fit underfloor heating near Stoke-on-Trent£223
Fit underfloor heating near Stratford-on-Avon£246
Fit underfloor heating near Stroud£288
Fit underfloor heating near Suffolk Coastal£320
Fit underfloor heating near Sunderland£259
Fit underfloor heating near Swale£252
Fit underfloor heating near Swansea£228
Fit underfloor heating near Tameside£238
Fit underfloor heating near Teignbridge£252
Fit underfloor heating near Tendring£287
Fit underfloor heating near Test Valley£261
Fit underfloor heating near Thamesdown£310
Fit underfloor heating near Thanet£255
Fit underfloor heating near The Wrekin£254
Fit underfloor heating near Thurrock£265
Fit underfloor heating near Torbay£250
Fit underfloor heating near Trafford£242
Fit underfloor heating near Vale of Glamorgan£230
Fit underfloor heating near Vale of White Horse£285
Fit underfloor heating near Vale Royal£224
Fit underfloor heating near Wakefield£233
Fit underfloor heating near Walsall£231
Fit underfloor heating near Warrington£245
Fit underfloor heating near Warwick£238
Fit underfloor heating near Waveney£253
Fit underfloor heating near Waverley£285
Fit underfloor heating near Wealden£270
Fit underfloor heating near West Lancashire£235
Fit underfloor heating near West Lothian£275
Fit underfloor heating near West Wiltshire£310
Fit underfloor heating near Wigan£237
Fit underfloor heating near Windsor & Maidenhead£288
Fit underfloor heating near Wirral£228
Fit underfloor heating near Wokingham£289
Fit underfloor heating near Wolverhampton£232
Fit underfloor heating near Wrexham Maelor£283
Fit underfloor heating near Wychavon£265
Fit underfloor heating near Wycombe£294
Fit underfloor heating near York£228