Pipe cover in Sutton extensions and retrofits
Without the right screed on top, underfloor heating does not perform. It spreads heat from the pipes, protects them and gives the floor its strength, so the depth over the pipes is not something to trim to save a few millimetres of height or a little money.
Cover is the figure that counts. Liquid screed must bury the pipework by at least 25mm, making a layer of something like 45 to 50mm, and sand and cement wants close to 45mm of cover. On an extension to one of Sutton's inter-war houses, the whole build-up of insulation, pipes and screed has to fit between the slab and the finished level of the old suspended timber floor. When that height is tight, the thinner liquid screed option for Sutton often makes the difference.
Every pipe has to be wrapped in screed, with no trapped air anywhere. Liquid screed flows around them naturally. A hand-laid sand and cement screed has to be compacted carefully around the pipes to reach the same result, and it can suit smaller heated rooms or a system laid in a cement based build-up.
Before the pour starts in a Sutton extension, our crew checks that the insulation, a membrane and the strip around the walls are all present, and supplies whatever has not been fitted. That strip around the room lets the screed move as it warms. The finished floor is flat enough to take engineered wood, LVT or tiles.
Heating up new floors in Sutton town centre flats
Newer flats in Sutton town centre use underfloor heating with liquid screed, and a heated floor in a block follows the same rules as one in a house. Switch the heating on too early, or crank it up too quickly, and the floor suffers.
With calcium sulphate, warming can normally start around 7 days after pouring. Sand and cement gets 21 days or more with the heating switched off. Commissioning is then gradual: the flow temperature starts low and is raised in small steps, with pauses, until it reaches working temperature. Running it hot straight away is a common cause of cracking. We put the warm-up steps on paper for you, so the person commissioning your heating and the floor layer follow the same dates.
Warmth helps the screed dry, but the flooring still waits for a moisture test. For the timings, see our screed drying guide. In a town centre flat or a back extension with heating pipes, allow £20 to £35 a m² for liquid screed, going by published trade rates. Over the border, we also cover heated floors in Kingston upon Thames.
Underfloor Heating Screed prices in Sutton
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 Sutton
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 Sutton
As the crow flies, our yard in Slough is about 23.6 miles from Sutton, which lies to the east-south-east. Postcodes here include SM6, CR0, CR4 and SM2, and Ewell (3.6 miles), Croydon (3.7 miles), Merton (3.7 miles) and Epsom (4.7 miles) are close by.
More on underfloor heating screed, part of our screeding services.
