Underfloor heating (UFH) has grown significantly in popularity — particularly in kitchen extensions and new builds. Here's what the genuine benefits are, and where radiators are still the better choice.
How wet UFH works
Wet (hydronic) UFH circulates warm water through pipes embedded in the floor. The large surface area of the floor distributes heat evenly at low temperatures (35–45°C for UFH vs 65–80°C for radiators).
The genuine advantages
Comfort: Warm floors feel noticeably more comfortable than room air heated primarily by convection from radiators. Particularly valued in bathrooms, kitchens, and bedrooms.
Efficiency with heat pumps: UFH's low temperature requirement matches heat pump output perfectly — heat pumps are at their most efficient when producing water at 35–45°C. The combination of heat pump + UFH is the gold standard for low-carbon heating efficiency.
Space: No radiators means more wall space and cleaner aesthetics.
The limitations
Response time: UFH takes 2–3 hours to heat a cold floor — it cannot respond quickly like a radiator. Works best with constant background heating rather than intermittent heating.
Renovation cost: Retrofitting UFH into an existing property means lifting floors — expensive and disruptive. Best installed during renovation or new build.
Tile and stone floors: UFH works best under tile, stone, and engineered wood. Thick carpet and solid wood are less suitable.
Our recommendation
UFH is excellent for new builds, extensions, and bathrooms during renovation. For whole-house retrofits, the disruption cost usually outweighs the benefit.