Heated extensions behind Crouch End and Muswell Hill houses
Most houses in the borough are joined to their neighbours. Only 4% of Haringey's homes are detached and 9% semi-detached, so a heated extension usually goes onto the back of a terrace, with limited space and one route in for materials. That route shapes how the screed is delivered.
The new floor's finished height is set by the old house, and the screed depth follows from that. Poured liquid needs a minimum of 25mm over the pipework, which totals about 45 to 50mm. A traditional mix needs nearer 45mm over the same pipes, so its floor comes out deeper. Both have to sit above insulation and a membrane, with an edge strip around the room to allow for movement.
Before anything is poured we inspect the layers below, the insulation, the membrane and the edge strip, or supply them ourselves. The screed then has to encapsulate the pipes completely. Air pockets around the pipes slow the heating and can leave weak spots in the floor, which is one reason liquid screed in Haringey is so often chosen over heating. Nothing needs compacting, because the mix finds its own way beneath and between every pipe run.
Flatness matters for what goes on top. Whether you choose tiles, LVT or engineered wood, the finish needs a flat base, which a heated screed laid well gives you with no extra levelling. Over heating pipes, 2026 UK prices for a poured liquid floor sit at £20 to £35 per m².
Commissioning the heating in a Haringey home
The most common mistake with a heated screed happens after we leave: switching the heating on too soon or too hot. Screed needs to cure first. A calcium sulphate floor is normally ready for gentle heat from about day 7. Sand and cement is different: the heating stays off for three full weeks, 21 days, and no less.
From there, commissioning is gradual. Your flow temperature begins low, is stepped up across several days, and is then held at that level before the floor finish goes on. Your heating engineer sets the schedule, and we give clear guidance on how it fits the screed.
Retrofits in older houses bring their own challenge, which is height. A Victorian or Edwardian ground floor that was never given a damp proof membrane may have to be dug out, so there is room for insulation, pipes and screed beneath the existing doors. That groundwork falls under our floor preparation work. For a comparison of the two screed types over heating, see liquid screed vs sand and cement. For a heated extension over the border, see underfloor heating screed in Barnet.
Underfloor Heating Screed prices in Haringey
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 Haringey
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 Haringey
Haringey is about 23.1 miles east of our Slough base as the crow flies, with postcodes including N22, N11, N2 and N10. The nearest towns to it are Islington (3.1 miles), Hackney (3.5 miles), Camden (3.5 miles) and Barnet (4 miles).
More on underfloor heating screed, part of our screeding services.
