Heated kitchen extensions in Purley, Sanderstead and Kenley
Think of a heated Purley extension floor as a stack. At the bottom is the slab, with insulation and a membrane over it and an edge strip lining the walls. Next the heating engineer clips down the pipes and pressure tests them, and only then do we screed. Before the pour we inspect every layer, and we can provide the insulation, membrane and edge strip ourselves if they are missing.
Cover over the pipes decides strength and heat spread. A pumped liquid screed has to clear them by 25mm or more, making the floor about 45 to 50mm deep, while a hand-laid floor wants close to 45mm over the top. Liquid screed encapsulates the pipes fully with no air pockets and responds faster once the heating runs; sand and cement suits a specification that asks for it, or a floor that may get wet.
Detached houses are 12% of Croydon's homes, and the larger ones in Purley, Sanderstead and Kenley suit this kind of heated kitchen extension. Each one means a new heated floor meeting the old house at a threshold. We set the screed level to that threshold and plan any joints to follow the heating zones, so each zone can expand and contract without cracking.
A heated floor will take tiles, LVT or engineered wood, provided its surface is flat to the standard the finish asks for. Where a finish needs SR1, make sure the specification says so before the pour, not after. Ask the flooring supplier for its limits early.
Retrofits and warm-up schedules in Croydon's older homes
Retrofitting underfloor heating into an older Croydon house is harder than heating an extension, mainly because of floor height. Adding insulation, pipes and screed to an existing floor can lift it above door thresholds and the level of the hall. In a Victorian terrace in South Norwood or Selhurst, where the old solid floor may be coming out anyway because it has no membrane, digging a little deeper solves the height problem at the same time. Liquid screed's thinner build-up also helps; our liquid screed page for Croydon has the depths.
Commissioning is where new heated floors are damaged. Warm water may go through the pipes of a calcium sulphate floor from roughly day 7; under sand and cement, hold off for at least 21 days. In both cases the first runs should be cool, with the flow temperature lifted in modest steps spread over several days. We give written guidance, and your heating engineer runs the programme.
Since K & B never fits the heating pipes, it pays to line up your heating engineer and our pour date at the same time. The screed drying guide explains why a heated floor still needs time before flooring, and insulation and membranes covers the layers below the pipes.
Underfloor Heating Screed prices in Croydon
Liquid screed over underfloor heating: £20 to £35 per m² supplied and laid (trade2base, June 2026), so £700 to £1,230 for 35 m². trade2base gives these figures excluding VAT. See our floor screeding cost guide or screed calculator.
Who lays your underfloor heating screed in Croydon
K & B Screeding’s own team, led by director Donatas Bardisevicius. Founded 2019, company 12298780.
See what customers say in our Google reviews and on our testimonials page.
Underfloor Heating Screed from Slough to Croydon
As the crow flies, our yard in Slough is about 26.8 miles from Croydon, which lies to the east-south-east. Postcodes here include CR0, CR5, CR8 and CR7, and Sutton (3.7 miles), Caterham (5.7 miles), Bromley (5.8 miles) and Merton (6.3 miles) are close by.
More on underfloor heating screed, part of our screeding services.
