Underfloor HeatingInstalled & RepairedAcross Manchester

In a new floor or a full renovation, pipe is clipped or stapled to insulation and buried in screed. This is the best-performing arrangement: excellent contact, even heat spread and a useful thermal mass that holds temperature between firing cycles. It needs floor height and a controlled warm-up schedule before the covering goes down.

Where floor height is limited — a retrofit into an existing kitchen, for example — low-profile overlay panels take pipe in a build-up of around 15–20mm. Performance is slightly lower in mass terms but response is faster, and it avoids re-hanging every door in the house.

In suspended timber floors, pipe runs between joists on spreader plates with insulation below. Getting the insulation right matters more here than anywhere else: without it a large share of the output disappears into the void beneath.

We use oxygen-barrier PE-RT or PEX-A pipe laid in continuous loops with no joints under the floor — every connection is at the manifold, where it can be reached. Barrier pipe matters because oxygen ingress through non-barrier pipe corrodes the steel components of the wider system.

Loop length is limited by pressure drop, typically keeping each circuit within a manageable maximum so flow can actually be achieved across it. Long rooms are split into multiple loops rather than stretched into one, and pipe spacing is tightened in high-loss zones such as areas beneath large glazing.

The manifold carries flow meters, isolation and actuators, and must be accessible for balancing and future servicing. Putting it behind a fixed kitchen unit is a decision that costs money later.

Boiler flow temperature is far too high to send straight into a floor. A blending or mixing arrangement at the manifold mixes return water into the flow to hold the circuit at the design temperature, protecting the screed and the floor covering and giving the even output underfloor is chosen for.

Where underfloor serves the ground floor and radiators serve upstairs, the two run as separate zones with the underfloor blended down. This mixed arrangement is the most common installation we do in Manchester houses, since it avoids re-piping upstairs unnecessarily.

Insulation beneath the pipe is not optional. Without it the floor heats the ground or the void as readily as the room, and running costs rise permanently. Retrofits into old solid floors without insulation are the single most common reason an existing system underperforms.

The floor covering above sets the ceiling on output. Tile and stone are ideal. Engineered timber works well when rated for underfloor use and installed with the right adhesive. Thick carpet and heavy underlay can throttle the system to the point where it cannot heat the room — the total thermal resistance of the build-up needs to stay within the design assumption, and we check it before the design is finalised.

Underfloor is slower to respond than radiators because of thermal mass. That means it should be run at a steady setpoint over long periods rather than switched on and off in short bursts as a radiator system might be. Set correctly, that steadiness is what makes the room feel better.

Each zone gets a room thermostat wired to a wiring centre operating actuators at the manifold. Smart controls allow schedules per zone from a phone, which suits households where rooms are used at quite different times.

Existing systems that have never worked properly can usually be improved without lifting a floor. Balancing flow meters, replacing seized actuators, correcting blend temperature, flushing the manifold and dosing with inhibitor together resolve most cases of slow or uneven underfloor.

Where a genuine leak is buried, we trace it before cutting anything, so the floor is opened in one place rather than explored. That work links directly to our leak detection service.

In bathrooms, underfloor pairs naturally with a full bathroom installation — tiled floor, no radiator eating wall space, and a towel rail retained on the heating circuit for towels rather than heat output.

In extensions and garden rooms with large glazing, underfloor alone may not carry the heat loss on the coldest days. We size honestly and say when a supplementary emitter is needed rather than promising a floor can do what the glazing will not allow.

Small commercial spaces such as salons, studios and showrooms benefit from the clear walls and even warmth, with zoning arranged around trading areas rather than domestic rooms.