Underfloor heating installation

Water-based underfloor heating, run from your boiler and planned around the floor you have.

Gas Safe registered (554328) Worcester Bosch accredited Free, no-obligation quotes

What we offer

Wet underfloor heating runs warm water from your boiler through pipes laid beneath the floor, turning the whole floor into a gentle, even heat source. It frees up wall space, keeps warmth at the level where you live, and suits kitchen extensions, open-plan rooms and bathrooms where radiators are awkward to place. The work is part plumbing, part floor build-up, so it pays to plan it early.

We install wet underfloor heating as part of our central heating work, connected to the existing boiler and controlled alongside any radiators. John The Plumb is Gas Safe registered (554328) and a Worcester Bosch accredited installer. A free in-home survey looks at the floor, the boiler and the controls, and you receive a fixed price in writing.

Wet systems run from your boiler
Extensions, new floors and retrofits
Manifold, zoning and room thermostats
Works alongside existing radiators

Get a free quote 07891 410 960

New floors and extensions

The easiest time to fit underfloor heating is when a floor is being laid anyway. In an extension or a new screeded floor, insulation goes down first, then the pipe circuits are clipped or tracked in place and the screed is poured over them. The screed holds and spreads the heat. Because the pipework is buried, it is pressure-tested before the floor goes down. We work with your builder on timing, so the pipes are laid at the right stage and the floor layers know what is beneath them.

Retrofitting into an existing room

You do not always have to dig up a floor. Low-profile retrofit systems only add around 15–20mm to floor height and work brilliantly under tile, LVT and engineered wood. On suspended timber floors, pipes can sometimes run between the joists with spreader plates. The survey looks at the existing floor, door thresholds and kitchen plinths, because any rise in floor level has knock-on effects that are better known before you commit.

The manifold and the boiler connection

Each room or zone has its own pipe circuit, and all circuits return to a manifold, which is the distribution point that controls flow to each loop. Underfloor heating runs at a lower water temperature than radiators, so where the two share a boiler, the manifold usually has a mixing valve and pump to deliver the right temperature to the floor. Finding a sensible position for the manifold, often in a cupboard or under stairs, is one of the first things we agree on site.

Zoning and controls

Each zone gets its own thermostat, so a kitchen extension can be kept at a different temperature from a bathroom or living room. Floors warm up and cool down more slowly than radiators, which suits steady schedules rather than quick bursts of heat. We set the controls up so the floor and the radiators work together, and show you how to programme them at handover. If you are also considering smart heating controls, the survey is a good point to discuss compatibility.

Living with underfloor heating and radiators

Most homes we work on end up with a mix: underfloor heating in the new or ground-floor space and radiators elsewhere. That is entirely normal, and the boiler can serve both. Floor finish matters, because thick carpet and underlay hold heat back more than tile or stone, so tell us what you plan to lay. If the boiler is ageing, combining the underfloor work with a boiler replacement can simplify the pipework and controls.

FAQs

Frequently asked questions

Can underfloor heating run off a combi boiler?+

Yes. Wet underfloor heating can be connected to a combi, system or regular boiler. The survey checks the boiler has the capacity for the extra heating and how the manifold will connect.

Can you fit underfloor heating in an existing floor?+

Yes — low-profile retrofit underfloor systems only add around 15–20mm to floor height and work brilliantly under tile, LVT and engineered wood. The survey checks thresholds and fixed units before you decide.

Do I still need radiators?+

Not in the rooms with underfloor heating, provided the floor area and heat requirement allow it. Other rooms can keep their radiators, all running from the same boiler.

Related services

Central heating installation How wet underfloor heating works Radiators vs underfloor heating What affects underfloor heating cost Boiler replacement

Plan your underfloor heating

Book a free survey to discuss the floor, the boiler and the controls, with a fixed written quote.

Get a free quote 07891 410 960