Heating a whole ground floor in Shenfield and Hutton
Retrofitting heating under an existing ground floor usually means lifting the old finish and, often, the old screed as well. Whatever goes back, insulation, pipes and screed together, has to squeeze into the gap from the slab up to a finished level that the doors, stairs and new extension already dictate. Post-war houses seldom have height to spare, so the screed you pick can decide whether the heating fits at all.
With liquid screed the pipes need 25mm or more above them, giving a floor around 45 to 50mm deep. A sand and cement floor needs around 45mm above the pipes on its own, which makes the whole build-up thicker. In a Warley semi with no height to give, pouring a flowing mix is frequently the only route to heating that leaves the thresholds where they are.
A flowing mix also wraps each pipe completely, leaving no air gaps, and its thinner, denser layer heats up more quickly. Sand and cement still earns a place, for instance where a wet room joins the heated floor. The pour itself is described on our pumped screed page for Brentwood.
Bigger houses bring bigger heated floors, and 24% of Brentwood homes fall in council tax bands F to H. Across that much floor, the insulation and edge strip need the same care as the screed, and our insulation and membrane service can supply or check both ahead of the pour.
Commissioning heated floors in Brentwood extensions
Do not turn the heating on the day after the pour. A calcium sulphate floor will usually accept warmth after roughly a week (about 7 days), whereas sand and cement asks for three weeks, 21 days, as a minimum. Then the flow temperature goes up in small steps across several days, is held, and comes back down, following the heating installer's commissioning plan.
Hurry this and the screed can crack or the finish can lift months later. A slow commissioning also draws moisture out, which helps before tiles or wood are laid.
Garden rooms and single-storey extensions in Brentwood often run on a separate circuit, and the rules do not change: proper cover, an edge strip round the perimeter to absorb movement and a controlled first warm-up. The pipes have to be clipped down, pressure tested and kept under pressure while we pour so that any damage shows straight away.
Dried out and taken through its heating cycle, the floor will be true enough to take tiles, LVT or engineered boards. In a Brentwood garden room the floor may be the only heat source, so patience at this stage pays back. A moisture test confirms the timing, and our drying times guide for screed explains what changes it. In a neighbouring borough, see heated floor screed in Havering.
Underfloor Heating Screed prices in Brentwood
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 Brentwood
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 Brentwood
As the crow flies, our yard in Slough is about 41.4 miles from Brentwood, which lies to the east. Postcodes here include CM15, CM14 and CM13, and Billericay (4.8 miles), Havering (5.4 miles), Basildon (7.2 miles) and Stanford-le-Hope (9.1 miles) are close by.
More on underfloor heating screed, part of our screeding services.
