Heating old and new rooms together in Crowborough
Running underfloor heating from a new extension back into the existing kitchen gives one warm, open floor, but it asks a lot of the screed. The old room may have less depth to play with than the new one, and the finished floor must be level across both.
A thin liquid screed laid over insulation usually solves that. With 25mm or more above the loops, it usually comes to 45 to 50mm, and because it fills every gap around them without trapping air, the room heats quicker and wastes less. A hand-laid cement floor wants around 45mm above the pipes and so ends up thicker, though it still has a place in wet areas and small rooms.
On the old side of the knock-through, the original floor may well need lifting to fit insulation and pipework. That is also the moment to check what is underneath. In houses from 1945 to 1972, which are 28% of Crowborough's homes, the original slab may be sound enough to build on or may need replacing.
Any gaps in the insulation, membrane or perimeter strip get picked up on our pre-pour check, and we can bring whatever is missing. Leave the loops pressurised while we pour, so a nicked pipe shows up there and then. For pumping and access, see liquid screed in Crowborough.
Commissioning a heated screed in Crowborough homes
In a Crowborough extension, the first few weeks after the pour decide how well a heated screed performs. Warm it slowly and the screed dries evenly instead of cracking.
Calcium sulphate will accept warmth after roughly 7 days, whereas cement mixes need three weeks (21 days) as a minimum. Whichever you have, begin with a low flow temperature and nudge it up daily for several days, as the commissioning schedule lays out. We pass that plan to both you and your heating engineer, so nobody is guessing.
Using the heating this way also helps the floor dry, which matters when a flooring fitter is waiting. The floor must still pass a moisture test before timber, LVT or tiles go down, and calcium sulphate needs its laitance sanded off first.
On the newer estates, snagging, levelling and screed repairs before flooring are more typical than a new heated screed. Where one of those floors needs attention, see screed repairs. Our guide on screed thickness shows full build-ups, and we also cover underfloor heating screed in Uckfield.
Underfloor Heating Screed prices in Crowborough
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 Crowborough
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 Crowborough
On the map, Crowborough sits south-east of Slough, about 47.8 miles from our base in a straight line (postcodes including TN6), next to Royal Tunbridge Wells (6.7 miles), Uckfield (6.9 miles), East Grinstead (8.6 miles) and Tonbridge (10.3 miles).
More on underfloor heating screed, part of our screeding services.
