Underfloor Heating Cardiff & South Wales

Assess first. Recommend second.

Underfloor heating is a design decision, not an add-on

Wet underfloor heating can provide even room temperatures and work well with lower flow temperatures, making it attractive for heat pumps and efficient boiler systems. Its performance depends on the floor construction, insulation, covering, room heat loss and available floor area.

The best time to plan it is early in a renovation, extension or new floor project. Manifold location, pipe routes, finished floor levels, drying times and controls all affect other trades. SwiftHeat UK helps coordinate the heating design with that wider programme.

Underfloor heating may suit the whole property or selected areas such as an open-plan ground floor. Upstairs radiators can remain if a mixed system is designed and controlled correctly.

Service scope

Underfloor-heating planning covers

Room heat requirements and target design temperatures

Floor construction and insulation context

Pipe layout, circuit lengths and manifold position

Zones, thermostats and wiring centres

Boiler or heat-pump integration

Mixed systems with radiators where appropriate

Pressure testing before floor finishes are completed

Commissioning, balancing and controls handover

Whole-system thinking

Floor coverings and response time matter

Different floor finishes transfer heat differently and may have product-specific temperature limits. Heavy construction can store heat well but responds slowly; lighter retrofit systems can respond faster but still require careful output calculations.

We explain the expected operating pattern before installation. Underfloor heating is often most comfortable when run steadily with suitable compensation, rather than treated like a radiator that is switched on for a short burst.

How we work

A clear path from first conversation to confident handover.

01

Coordinate

We review plans, floor build-up, heat source, finishes and the construction programme.

02

Design

Zones, loops, spacing, manifold and controls are planned around room requirements.

03

Test

The system is installed and pressure-tested before it becomes concealed by the floor.

04

Set up

Circuits and controls are commissioned with guidance on warm-up and normal operation.

When to consider it

Underfloor heating often suits

Extensions and open-plan kitchen-living spaces
Renovations where floors are already being replaced
Homes designed around lower flow temperatures
Spaces where wall area for radiators is limited
Mixed systems combining floor heating and radiators

Helpful answers

Underfloor heating FAQs

Can underfloor heating work with a boiler?

Yes. A wet system can work with a suitable boiler design and temperature controls. It is also well suited to heat pumps because it can deliver useful output at lower water temperatures.

Can it go under wood or tiles?

Many tile, engineered-wood and other floor products are compatible, subject to the flooring manufacturer’s limits and a suitable heating design. The final covering must be known during planning.

Can I have underfloor heating downstairs and radiators upstairs?

Yes. Mixed-emitter systems are common, but temperatures, zoning and controls must be designed so both parts operate correctly.

Is underfloor heating suitable as a retrofit?

It can be, particularly during renovation, but floor height, insulation, door thresholds and existing construction need careful review. Low-profile systems still require output checks.

Connected services

Wet underfloor heating design & installation in Cardiff & South Wales

Underfloor heating is a design decision, not an add-on

Underfloor-heating planning covers

Floor coverings and response time matter