Adding heating to finished rooms on Maltings Lane
Retrofitting underfloor heating into a recent house is mostly a question of height. The existing floor is taken up, and the new insulation, pipes and screed all have to fit beneath the same thresholds, skirting and bottom stair. There is rarely any spare depth.
So the screed you pick makes a real difference. A flowing screed needs at least 25mm of cover, which usually makes the finished floor 45 to 50mm deep. Sand and cement placed by hand needs roughly 45mm of cover, adding to the overall depth. On a retrofit where every millimetre counts, liquid is often the only way to keep useful insulation under the pipes.
Contact matters too. A flowing screed surrounds every pipe with no air gaps, so the heat reaches the surface quickly and evenly and the system responds faster. A hand-laid screed can achieve good contact, but it needs careful compaction along each run, and any voids left around a pipe become cool spots that cannot be fixed later.
12% of Witham's homes were built between 2000 and 2014, so a fair number of houses are recent enough to have modern ground floors. Houses of that age may already have an insulated ground floor, but check its depth and condition before planning the new build-up. Our liquid screed page for Witham describes the pour, and the screed thickness guide shows typical heated floor build-ups.
Heated rear extensions on Witham terraces
Behind a Witham terrace, a new rear extension makes heating in the floor simple to plan, since nothing existing limits the levels. The same applies to insulated garden rooms. The insulation, membrane and edge strip must be right before the pipes go down, since none of it can be corrected once the screed is poured.
Once the floor is laid, the heating has to wait. On calcium sulphate, warmth can normally be introduced from around day 7; on sand and cement, wait 21 days or more. First firing should begin with cool water, turned up step by step across several days. That plan is written down for you, and your heating engineer follows it.
Newer streets account for part of the town too, with 10% of homes dating from 2015 on. On those, heating is usually designed into the plots from day one, so the developer sets the order and we screed one plot after another.
In 2026 UK pricing, a pumped floor over heating pipes costs £20 to £35 a square metre. For a fuller picture of costs, read how much floor screeding costs.
Underfloor Heating Screed prices in Witham
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 Witham
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 Witham
On the map, Witham sits east-north-east of Slough, about 58.3 miles from our base in a straight line (postcodes including CM8), next to Maldon (5 miles), Braintree (6.6 miles), Chelmsford (8.4 miles) and Halstead (10 miles).
More on underfloor heating screed, part of our screeding services.
