Whole heated ground floors on St George's Hill
On a large detached house, underfloor heating may run under the entire ground floor rather than one room. That changes the job. The pour is bigger, heating zones meet at doorways, and the screed has to perform evenly across all of it.
Start with how much screed sits above the pipes. Liquid and anhydrite screeds need 25mm minimum there, for a total depth of 45 to 50mm, while sand and cement needs roughly 45mm of cover by itself. On a whole floor, the thinner liquid build-up saves height and weight, and it flows fully round the pipes with no air pockets, which helps the system respond quickly.
Joints matter more on a big floor. Where heating zones meet, or where a bay would otherwise be very large, joints are planned before the pour so the screed can move as it warms and cools. Each zone's manifold and pipe layout comes from your heating engineer's drawing, and we set the joints to match it rather than guessing on the day.
Pipe laying sits with your heating engineer. We still inspect the insulation boards, the membrane and the edge strip before the pour, and bring any your builder has left out. For the grade and finishing of calcium sulphate, see anhydrite screed over heating. Heated liquid screed comes out at £20 per m² up to £35 on 2026 UK figures.
Retrofitting heating in older Weybridge homes
Putting heating into a house that was not built for it is the awkward version. In Weybridge, 31% of homes were built between 1945 and 1972, and in Oatlands many houses are older still. Floors in houses like these were not built with room for insulation, pipes and screed on top, so laying over the old floor can raise it past doors and stairs.
The cleaner route is usually to dig out the old floor and rebuild at the right level, with the heating inside. Where that is not possible, the thinnest compliant screed over the pipes keeps the rise to a minimum.
When you can switch on depends on what was poured. Anhydrite is generally ready for warmth at around 7 days, whereas sand and cement waits 21 days or longer. The water temperature is raised slowly over several days on the commissioning schedule, never switched straight to full.
New homes are no exception: 6% of Weybridge homes date from 2015 or later, and rushing commissioning on a new floor can crack it just the same. Read screed drying times explained, or compare the Walton-on-Thames heating screed page.
Underfloor Heating Screed prices in Weybridge
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 Weybridge
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 Weybridge
Weybridge is about 13.6 miles south-east of our Slough base as the crow flies, with postcodes including KT13 and KT15. The nearest towns to it are Addlestone (1.5 miles), Walton-on-Thames (2 miles), Chertsey (2.4 miles) and Sunbury-on-Thames (3.7 miles).
More on underfloor heating screed, part of our screeding services.
