Underfloor heating installation in London
Underfloor heating run off the boiler rather than off electricity — pipe loops in or under the floor, a manifold, and controls that let each room have its own temperature. It suits an extension or a full refurbishment far better than it suits a room-by-room retrofit, and we will say which one you have.
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- DBS-checked engineers
- Emergency callout available 24/7
- Price agreed before work starts
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What this includes
- Wet underfloor heating in extensions and refurbishments
- Manifold installation, flow setting and balancing
- Screed systems and low-profile boards where height is tight
- Zone valves, thermostats and wiring centres
- Connecting to an existing boiler, cylinder or heat pump
- Fault-finding and repairs on loops that have gone cold
Worth knowing first
Some of this may save you a callout entirely. We would rather tell you than not.
Wet systems, not electric mats
Electric underfloor mats are an electrician’s job and are usually only worth it in a small bathroom. Everything on this page is wet — water through pipe loops, fed by your heating system. If you have been quoted electric for a whole floor, get a second opinion on the running cost.
Floor height is usually the real constraint
A traditional screed system adds a meaningful amount of build-up. Low-profile boards add far less but cost more per square metre. In a London flat with existing door heights and a fixed floor level, that decision is often made for you before anything else is.
It wants a low flow temperature
Underfloor heating runs at a much lower temperature than radiators. Mixing it into a system built for radiators needs a blending valve and proper controls, otherwise you get a warm floor upstairs and nothing downstairs, or a boiler that short-cycles itself to death.
Retrofitting the whole house is rarely the answer
Lifting every floor in an occupied house to fit underfloor heating almost never pays back against simply improving the radiators and controls. Where it makes sense is where the floor is coming up anyway.
Common questions
Can I have it under wood or engineered flooring?
Engineered wood and most tiles are fine. Solid timber moves and needs care over the choice of board and the flow temperature. Deep carpet and thick underlay work against you, though a thin underlay is usually workable.
Will my boiler cope with it?
Usually, with the right controls. What matters is whether the boiler can modulate down far enough and whether the system can be zoned properly. We check that before quoting rather than after.
How long does it take to warm up?
Hours rather than minutes — a screed floor is a large slow mass. That is why it is set to a schedule and left, not switched on and off like a radiator.
One of my loops has gone cold. Can you fix it?
Usually. It is normally air, a stuck actuator or a blocked loop rather than a burst pipe. We can test the loops at the manifold without lifting the floor.
Part of our heating & hot water work
If the job turns out to be a repair rather than an installation, these are the pages that cover it.
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Boiler Installation
A new boiler sized for the property, fitted properly, with the price agreed first.
More on Boiler Installation -
Boiler Service
The annual check that keeps a boiler safe, efficient and inside its warranty terms.
More on Boiler Service
Other appliance work
Need underfloor heating in London?
Tell us what’s happening and where you are, and we’ll tell you what it costs before anyone starts work.