Pipe cover and depth in Wellingborough heated floors
Heat from the pipes travels out through the screed, which is why the cover above them is the figure to get right. With liquid screed that cover is 25mm minimum, so the layer normally ends up 45 to 50mm deep overall. Sand and cement asks for about 45mm of cover, which makes the finished floor noticeably thicker.
In a retrofit, that difference counts for a lot. In an older terrace near the centre, where the existing floor is dug out and rebuilt, every millimetre of height counts against the doorways and the bottom step of the stairs. A thinner pumped screed often makes heating possible without raising the floor. In a new house at Stanton Cross or Glenvale Park, the depth is normally set on the drawings and we pour to that figure.
Full encapsulation is the second requirement. Air pockets around pipes leave cold spots and weak areas. A flowing screed moves around every pipe on its own, while a hand-laid screed has to be worked in carefully around the loops.
Underneath, the build-up must be right: rigid insulation, a membrane with taped joints, and an edge strip around every wall so the heated screed can expand. We check or supply these through our insulation and membranes service. For a closer look at the pumped option, see liquid screed in Wellingborough. Fitting the pipes themselves is not something we do.
First heat-up after a Queensway or Kingsway extension
Owners on the overspill estates regularly add extensions, and when the new room includes a wet heating system, the screed goes in over the pipes before anything else. After the pour, though, nobody should touch the thermostat for a while.
With calcium sulphate the heating can normally come on from about day 7; with sand and cement, wait 21 days at the least. In both cases the start is gradual: the water temperature begins low and rises in small steps over a period of days, following the commissioning schedule your heating engineer and the screed supplier provide. Turn it straight up to full and the screed can crack and curl.
Warming the floor this way also helps it dry, but it does not replace testing. A hygrometer test still comes before any tiles, LVT or wood boards go down, and the floor only passes once the reading sits inside the limit the flooring manufacturer sets. How the depth of the screed changes that wait is covered in how long screed takes to dry.
Tiles and thin floors also need a flat base. If a heated screed is slightly out, a thin coat of compound can bring it to SR1 or SR2 before the flooring, as described under floor levelling in Wellingborough.
Underfloor Heating Screed prices in Wellingborough
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 Wellingborough
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 Wellingborough
As the crow flies, our yard in Slough is about 53.3 miles from Wellingborough, which lies to the north. Postcodes here include NN8, and Rushden (4.1 miles), Burton Latimer (4.2 miles), Kettering (6.9 miles) and Raunds (7.3 miles) are close by.
More on underfloor heating screed, part of our screeding services.
