Liquid screed for Crowborough extensions and knock-throughs
The classic Crowborough project is a single storey extension or a knock-through on a detached house from the 1960s to 1990s. Once the wall comes out, the old kitchen, the old dining room and the new extension become one floor, and that floor has to finish at one level with no step at the old wall line.
Pumped liquid screed handles that well. It flows across the whole area and settles flat, so surface regularity to SR1 or SR2 is readily achievable without ruling the floor in strips by hand. Since it barely moves as it sets, even a long through-room from the front of the house to the garden needs only a few joints, far fewer than sand and cement would.
It is also thin. Floated on insulation in a house, it can be as little as 35mm or so, against roughly 65mm for a hand-laid floating floor. When heating pipes go in, liquid screed needs at least 25mm over them, usually 45 to 50mm in total. That saving in depth is often what lets insulation, heating and screed fit under an existing threshold.
You will be offered one of two binders: calcium sulphate or cement. Calcium sulphate suits most dry rooms; cement based types are used where the floor may get wet. For the calcium sulphate option, grades and sanding are on our Crowborough anhydrite flow screed page, and our comparison of liquid and sand and cement screed sets out the trade-offs.
Pump access and drying on Crowborough driveways
Before anything is poured, the mixer and pump have to find a spot near enough to your extension for the hose to reach. Space off the road keeps the hose run short. Where the extension is at the back and the only route is along the side of the house, the hose can run through a side gate, so check that the path is clear and gates open fully.
Tell us about parking, gradients and any shared drive when you ask for a price, and we plan the lorry position around them. If a pump cannot reach at all, hand-laid screed is the alternative.
For the first day or two after pouring, shut the room up so no draught crosses the wet surface; then air it well. Expect around a millimetre's depth to dry out each day for the first 40mm, with the pace falling off beyond, and a calcium sulphate floor also has its laitance sanded away before flooring goes down. Humidity, depth and heating all change the timetable, as our drying times guide shows. Six or seven miles away, there is a page on pumped screed for Royal Tunbridge Wells.
Liquid Screed prices in Crowborough
Liquid screed: £24 to £31 per m² supplied and laid (MyJobQuote, August 2026), so £960 to £1,240 for 40 m². MyJobQuote does not say whether these figures include VAT. See our floor screeding cost guide or screed calculator.
Who lays your liquid 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.
Liquid 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 liquid screed, part of our screeding services.
