Extending and rebuilding post-war floors in Corsham
When a post-war semi in Corsham is extended or its kitchen opened up, the ground floor sometimes has to be rebuilt as well. If the original floor lacks insulation, it is often dug out so insulation and a membrane can go in, with a new screed on top. Sand and cement is a sound choice for that work, particularly where the rooms are small, the floor is broken up by walls and doorways, or the screed needs to carry a load early.
It goes down in one of two ways. A floating screed sits over insulation and needs depth to resist cracking: 65mm in a house and 75mm in commercial buildings. A bonded screed is laid directly onto a sound concrete base and stuck to it, which allows 25 to 40mm where height is limited. We mix on site in batches, then compact and float each area to a dense, level finish.
We can tweak the recipe too. Fibres can be added to the mix, and rapid drying additives speed things up when the programme is tight. See our fibre reinforced screed page for when fibres are worth adding.
Where the extension is a large open room, the newer part may suit liquid screed in Corsham, with sand and cement used in the original house. Both can be laid in the same project, each where it works well, and the two floors levelled to meet at the doorway.
Older Corsham stone cottages, wet rooms and garages
Older stone cottages in and around Corsham's historic centre are a different case. Their floors are often lime or stone flags laid straight onto earth, and the building relies on moisture being able to escape. Laying a dense sand and cement screed over that without a plan for damp can push moisture into the walls. Sometimes a limecrete base is the right answer instead, and it is better to settle that before any floor is broken out. Our insulation and membranes page explains the layers that go under a modern screed.
For a wet room, you want cement under the tiles. Calcium sulphate softens if it stays damp, which makes it unsuitable under a walk-in shower or on a utility room floor. Working by hand, we can also slope the floor towards the drain.
Garages are another fit. Converting a garage usually means raising a low slab to the house floor level with insulation and screed, as set out in our garage conversion screed guide.
Expect a longer wait for it to dry than a pumped floor would need. A 65mm floor takes weeks, longer in cold weather, so allow for it in the programme.
Sand and Cement Screed prices in Corsham
Sand and cement screed: £18 to £25 per m² supplied and laid (MyJobQuote, August 2026), so £450 to £630 for 25 m². MyJobQuote does not say whether these figures include VAT. See our floor screeding cost guide or screed calculator.
Who lays your sand and cement screed in Corsham
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.
Sand and Cement Screed from Slough to Corsham
Corsham is about 66.8 miles west of our Slough base as the crow flies, with postcodes including SN13. The nearest towns to it are Chippenham (3.5 miles), Melksham (4.7 miles), Calne (7.8 miles) and Trowbridge (7.9 miles).
More on sand & cement screed, part of our screeding services.