Heating a dug-out floor in central Hertford
A period terrace or cottage having its floor dug out already needs a membrane, insulation and a new screed. Adding heating pipes at that stage costs far less than lifting a finished floor later. The catch is height: the new floor has to finish at the old thresholds, so the dig depth has to allow for insulation, pipes and screed cover together.
Cover is the fixed part. Liquid screed has to bury the pipes under 25mm or more, which adds up to roughly 45 to 50mm of floor. Sand and cement has to cover them by about 45mm, which makes the finished floor thicker. In a cottage where every millimetre of dig costs time, the thinner liquid option often wins, though a small room with awkward access may still suit sand and cement laid by hand.
Whichever is chosen, the pipes must be fully encapsulated with no air pockets, the insulation boards tight together and an edge strip placed around every wall. We look over all of it before pouring, and if the insulation, membrane or edge strip is not in yet, we can provide it.
Pipes are pressure tested first. Leaks are cheap to fix before the screed goes on and expensive after it. It also helps to keep the system under pressure during the pour, so any damage shows straight away, and to photograph the pipe layout for future reference.
Extensions and newer homes in Bengeo and Foxholes
Semi-detached houses make up 26% of Hertford's homes, and post-war and late twentieth century houses are where extension slabs and kitchen refits come up most. A heated kitchen extension needs a correct depth over the pipes and a slow first warm-up, whether the house is in Bengeo, Rush Green, Pine Hurst, on the Foxholes Estate or at Horns Mill.
Newer homes may have heating designed in from day one. Of Hertford's homes, 11% were built since 2015, and a house of that age being extended may need the new heated floor matched to an existing system and floor height.
Most heated floor trouble starts on the day the heating first goes on. Calcium sulphate will generally accept low heat once about 7 days have passed; sand and cement is not ready for 21 days at the earliest. In both cases the temperature goes up gradually and is held, following a written schedule. Hurry it and the screed can crack, as our drying times guide explains. Keep rugs and boards off the floor during the first weeks, so moisture can leave the surface evenly.
If you are near the town boundary, we also lay underfloor heating screed in Ware.
Underfloor Heating Screed prices in Hertford
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 Hertford
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 Hertford
Hertford is about 30.5 miles north-east of our Slough base as the crow flies, with postcodes including SG14 and SG13. The nearest towns to it are Ware (2.2 miles), Hoddesdon (3.8 miles), Welwyn Garden City (5.6 miles) and Hatfield (6.5 miles).
More on underfloor heating screed, part of our screeding services.
