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Underfloor Heating Screed · Northamptonshire

Underfloor Heating Screed in Daventry

When a Daventry floor has wet heating pipes in it, we bury them in whichever screed that system needs, pumped or laid by hand. Heated floors are standard in the newest part of town: at Monksmoor Park and other recent phases, liquid screed with underfloor heating is the normal specification for an extension or refit, and 12% of Daventry's homes were built from 2015 onwards. We lay and finish the screed, and the heating engineer installs the pipes.

Heated screeds for Monksmoor Park extensions and refits

Where a Monksmoor Park house already has heating in a flowing screed, an extension or refit usually follows the same specification, so the new floor behaves like the old one. Your heating engineer puts the pipes down and tests them under pressure, then our pour fills in around them.

Everything hinges on the depth above the pipes. Pump it, and 25mm or more must cover the pipes, which in a Monksmoor Park extension usually gives a floor of 45 to 50mm. A hand-laid one wants nearer 45mm on top, so the floor ends up deeper and heavier. Liquid screed flows beneath and around each pipe, leaving no voids to block heat, and it warms up faster, which is why it is the usual partner for a wet system. More on the product is on the liquid screed page for Daventry.

Ahead of the pour we make sure boards, membrane and perimeter strip are down, bringing any that are missing, and that every pipe is clipped tight so it cannot float up. The edge strip matters more on a heated floor, because the screed expands and contracts as it warms and cools.

Getting the finished surface flat is part of the job too. Tiles, LVT and engineered wood all go down on heated floors, and each needs a flat, dry base. A heated floor that is out of level is expensive to correct once the heating has been commissioned.

Retrofitting heating into older Daventry houses

Adding underfloor heating to an existing Daventry house is harder than designing it into a new extension, because floor height is tight. Insulation, pipes and screed all add thickness, and raising the floor may clash with doors, stairs and kitchen units. Liquid screed at the minimum cover keeps the build-up as thin as it can be. Where even that is too much, taking up the existing floor and relaying it with the heating inside may be the way through, and floor preparation covers the breaking out.

Commissioning follows the pour. A calcium sulphate floor will normally take gentle heat after about 7 days, and the heating then helps it dry; a hand-laid cement floor needs 21 days as a minimum. In both cases the thermostat goes up a few degrees at a time over several days, never straight to maximum. We leave written guidance on the heat-up schedule for the heating engineer, so the first warm-up is handled the same way whoever switches it on. For homes nearer Rugby, see underfloor heating screed in Rugby.

Underfloor Heating Screed prices in Daventry

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 Daventry

Underfloor heating pipework laid through a doorway before the screed goes down
Underfloor heating pipework laid through a doorway before the screed goes down.

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 Daventry

As the crow flies, our yard in Slough is about 54.8 miles from Daventry, which lies to the north-north-west. Postcodes here include NN11, and Rugby (9 miles), Northampton (11.3 miles), Towcester (11.4 miles) and Lutterworth (13.7 miles) are close by.

More on underfloor heating screed, part of our screeding services.

FAQs

Underfloor Heating Screed in Daventry: your questions

How deep is underfloor heating screed in total?

Pumped over the pipes, it has to bury them by 25mm or more, so expect a layer between 45 and 50mm. With sand and cement, about 45mm goes over the pipes, making the layer noticeably thicker. Insulation sits beneath either one, so on a Daventry retrofit the whole build-up has to be checked against door and stair heights first.

Why does the heating have to be turned up slowly after screeding?

Freshly laid screed is full of water. Heating it hard and fast dries the surface before the body of the floor, which can cause cracking or curling at the edges. Raising the temperature in small steps, holding it, then lowering it lets the screed dry evenly. Our written warm-up plan means everyone in the house works to the same dates.

Who fits the pipes for a Daventry underfloor heating job?

That job belongs to the plumber or heating engineer, who fits the pipes and manifold and tests them under pressure; K & B never installs the pipes. We look over the boards, membrane and perimeter strip, fit any that are missing, and pour to the right depth above the pipes. Book both trades early so the pipe test is done before the pour date.

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A fixed price for your Daventry floor