Heated side return extensions in Dulwich and Nunhead
A side return extension on a Victorian terrace in Dulwich, East Dulwich, Peckham or Nunhead usually becomes an open kitchen and dining room, and underfloor heating is a natural fit for it. The difficulty is height. The new floor has to meet the existing house, and the original floor in these houses is often being dug out anyway because it has no membrane.
The build-up runs from the bottom: slab, insulation, heating pipes, then screed. Pipes under a liquid screed need cover of 25mm or more, and in these kitchens the finished layer then totals 45 to 50mm or thereabouts. Sand and cement, mixed by hand, needs close to 45mm over them. Where floor height is tight in an older house, the thinner liquid option can make the difference between meeting the hallway level and not, which is why liquid screed for Southwark homes can be the better choice for retrofits.
Whichever screed goes down, the pipes must be fully encapsulated with no air pockets, because voids cut heat output and weaken the floor. A perimeter strip along the walls gives the screed room to move as it warms up. Before pouring we look over the insulation, membrane and perimeter strip, and anything missing can be added through our insulation and membrane service. Once dry, the new kitchen floor is flat enough to take engineered wood, LVT or tiles.
When the heating goes on in Canada Water flats
Apartment work in Southwark, in blocks at Elephant Park, the Aylesbury replacement phases and Canada Water, often means liquid screed poured over underfloor heating on every floor. The screed and the heating then have to be brought up to temperature together, and rushing it is how floors crack.
On a calcium sulphate pour, the heating can normally go on after about 7 days. In these flats, sand and cement over heating pipes gets no heat until 21 days have gone by at the very least. In both cases the system is commissioned gradually: start low, raise the flow temperature in small steps, and hold it before going higher. You get a written heat-up schedule from us, which the heating engineer and the flooring fitter can both follow.
Running the heating speeds drying up, yet a moisture test still has to be done. Flooring goes down only once a hygrometer reading shows the screed is ready. Our drying time guide gives the detail on each period. Pricing a heated floor in an Elephant Park or Canada Water flat? Published trade rates put pumped screed over pipework at £20 up to £35 a m². For heated floors just across the borough boundary, see underfloor heating screed in Lewisham.
Underfloor Heating Screed prices in Southwark
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 Southwark
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 Southwark
Southwark is about 24.7 miles east of our Slough base as the crow flies, with postcodes including SE1, SE5, SE21 and SE22. The nearest towns to it are Lambeth (2.1 miles), Lewisham (3.2 miles), Tower Hamlets (3.5 miles) and Westminster (4.2 miles).
More on underfloor heating screed, part of our screeding services.
