Heated floors in Great Ashby and SG1 new homes
On a new home, underfloor heating is designed in from the start. Only 7% of the town's housing went up from 2015 onwards, yet that slice is where heated floors are standard. New homes in the SG1 town centre scheme and the newer houses at Great Ashby call for underfloor heating screeds, and a new build is planned with insulation, pipes and screed as one build-up. The depth is set on the drawings, and the screed contractor's job is to pour it exactly.
What sits above the loops is the figure to watch. Pumped screed wants 25mm or more there, which typically comes to around 45 to 50mm overall, whereas a hand-laid mix needs about 45mm over the loops alone and so ends up thicker and weightier. On most new builds a pumped liquid screed is chosen because it encapsulates every pipe without air pockets, spreading heat evenly across the room.
Acoustic floors add a requirement of their own. They are part of the same picture for the SG1 scheme and Great Ashby, and on an acoustic floor the layers under the screed have to be complete and correctly lapped before any pour. We inspect those layers before pumping, and if the developer has left them to us, our insulation supply fills the gap.
Once the build-up is ready, the pour itself works like any other liquid screed pour in Stevenage. An SG1 specification calling for a CA grade means anhydrite, so see our page on anhydrite for Stevenage floors for its drying, sanding and first warm-up.
Adding heating to Stevenage extensions and garage conversions
Older houses usually get underfloor heating one room at a time, most often in a rear extension or a converted garage. Because those floors are new, the insulated slab can be designed to take pipes and screed and still finish level with the existing house.
Pour day is not switch-on day. An anhydrite floor can normally be warmed a week later, about 7 days, but sand and cement stays off for 21 days or more. From there your heating engineer follows our written plan, starting with a cool flow temperature and lifting it bit by bit across several days. Jumping straight to full heat is how plenty of new floors crack.
Fitting the loops is outside what we do, and that holds for a Chells extension just as much as a Great Ashby new build. They should be fixed and pressure tested before we arrive, and we agree the date with the installer so nothing holds up the pour.
What the job costs depends on area, depth, access and whether we supply the insulation and edge strip; the cost guide explains each factor.
Underfloor Heating Screed prices in Stevenage
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 Stevenage
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 Stevenage
Stevenage is about 31.9 miles north-east of our Slough base as the crow flies, with postcodes including SG1 and SG2. The nearest towns to it are Hitchin (4.7 miles), Letchworth (5.3 miles), Baldock (6.1 miles) and Welwyn Garden City (6.8 miles).
More on underfloor heating screed, part of our screeding services.
