Heated Floors near you

In England, Approved Document P — the 2013 edition, which took effect on 6 April 2013 and is for use in England — applies to electrical installations in a dwelling-house or flat. An electric underfloor heating system is fixed electrical equipment and will normally be run from a new dedicated circuit, and a new circuit is one of the categories that must be notified. If it is going into a bathroom, the room is a special location and any addition or alteration to existing circuits there is notifiable too, not just a new circuit. Approved Document P sets three routes for getting notifiable work certified: self-certification by a registered competent person, certification by a registered third-party certifier, or certification by a building control body, and it gives the paperwork deadlines, including that a competent person or their registration body must give a Building Regulations compliance certificate to the occupier and to the building control body within 30 days of completion.

Wales draws the notifiable line more widely and it is a genuine difference rather than a wording change. Welsh Government guidance says you do not need to report replacing an electrical fitting such as a socket outlet, light fitting or control switch, any repair or maintenance work, or extra power points, lighting points or other alterations to existing circuits — except in a kitchen or bathroom, or outdoors. Adding a fused spur to an existing circuit is likewise exempt except in a kitchen, bathroom or outdoors. So an alteration that would be non-notifiable in an English kitchen is notifiable in a Welsh one.

Scotland and Northern Ireland are different systems again. In Scotland, schedule 3 to the Building (Scotland) Regulations 2004 lists work that may be done without a warrant but must still meet the standards, and the Scottish Government's own research into the regulation of electricians records that rewiring and wiring to artificial lighting need a warrant in flats and buildings over three storeys while houses up to two storeys are exempt, and that electrical work affecting a separating wall needs a warrant across all domestic building types. Scotland also has approved certifiers of construction who can certify that electrical work meets the regulations. Northern Ireland has no equivalent at all in its building regulations: the technical booklets published under the Building Regulations (Northern Ireland) 2012 run from B to V and there is no booklet for electrical safety.

Approved Document L volume 1, the 2021 edition incorporating the 2023 amendments, has a short section devoted to underfloor heating, and it is unusually specific for guidance that homeowners rarely read. New underfloor heating systems should all have controls to adjust the operating temperature. Room thermostats for electric underfloor heating systems should have a manual override. Heating systems for screed floors greater than 65mm thick should automatically reduce the room temperature at night or when the room is unoccupied — a recognition that a thick heated screed cannot respond quickly and has to be managed by anticipation rather than by reaction.

The insulation requirements underneath are where most retrofit arguments happen, because they take up the height nobody has. Ground floors and floors in contact with the outside should be insulated to limit heat losses to not more than 10W/m2, calculated from the thermal resistance of the floor finish and the underlying heated layer. Systems intended for intermittent or cyclical operation, or installed over unheated rooms, should be separated from the structural floor by insulation with a thermal resistance of at least 1.25(m2·K)/W. For an intermediate floor, the insulation layer reducing downward heat transmission should meet either that performance or the figures in BS EN 1264-4: not less than 0.5(m2·K)/W for electric systems and not less than 0.75(m2·K)/W for wet systems.

The practical reading is simple. Insulation under a heated floor is not an optional upgrade that improves efficiency at the margins; without it a significant share of the heat goes downwards into a slab, a void or the room below, and the floor above never feels as warm as expected. If a quotation for a retrofit does not mention insulation board beneath the heating layer, that is the first question to ask. Approved Document L is the England guidance; Scotland handles the same requirements through section 6 of its technical handbook and Northern Ireland through Technical Booklet F1.

Electric wins on retrofit. It adds only a few millimetres, it needs no connection to the boiler or the heat pump, one room can be done without touching the rest of the house, and it heats up quickly enough to be used on a timer in a bathroom. The catch is running cost: electricity is the expensive way to make heat, which makes electric underfloor heating sensible as comfort heating in a small room and expensive as the main heat source for a large one.

Wet wins on running cost and on whole-house heating, especially behind a heat pump, because a large floor area at a low temperature is exactly the sort of emitter a heat pump wants. The price is disruption and height: a proper screed is a wet trade with a long drying period, low-profile panels still add build-up, and clipping pipes between joists means lifting the floor. It also has to be integrated with the rest of the heating system, with its own manifold, actuators and controls.

Where both are possible, the deciding questions are usually mundane. How much height is there at the doorways. Is there a manifold position with access to it. Is the room used for half an hour twice a day or all day. Is the house heated by a boiler that runs hot, which suits radiators, or a heat pump that runs cool, which suits a floor. Answer those and the choice generally makes itself.

Electric and wet systems are priced on entirely different things, so compare like with like. An electric quote turns on the heated area rather than the room area, the type of mat or cable, the insulation board underneath, the levelling compound or adhesive bed over it, the thermostat, and the electrical work — which is where the cost sits if a new circuit has to be run from the consumer unit and certified. A wet quote turns on the number of zones and loops, the manifold and its position, the screed or overlay system, the pipework back to the heat source, the controls, and the drying and commissioning time. Build-up height drives both, because the cheapest system is the one the doorways can accommodate.

LokalMatch is the introduction, not the installation. Describe the job once with your postcode — which rooms, what the floor is now, how much height you have and how the house is heated — and heating and flooring pros covering your area get in touch with you. It costs a homeowner nothing to post the job; the pros pay for the requests they receive. LokalMatch does not install heating, does not set prices and does not vet, rank or recommend anyone, so confirming who is certifying the electrical work, and to whom, remains something to settle before the job starts.