Grades and products on Brighton and Hove specifications
Open the floor specification for a scheme like Preston Barracks and the screed is written as a short code under the European materials standard. Read it left to right: CA for calcium sulphate, then a C figure for crushing strength and an F figure for bending strength, each in N/mm2. A quiet domestic room can take CA-C20-F4. The everyday grade for a house, flat or office is CA-C25-F5. Anywhere that takes a beating gets CA-C30-F6.
On a mixed scheme, one development can call for more than one grade. Preston Barracks, granted permission in 2017, brought 369 homes, student rooms, academic buildings and a 55,000 sq ft building for start ups and high tech manufacturing; Circus Street added 211 homes and 450 student rooms. Apartments, offices and shared circulation on schemes like these do not all carry the same loads, and the engineer sets the grade for each. Whatever the engineer writes down is what goes in; we do not swap brands.
Sometimes an alpha hemihydrate product is named instead, to dry faster or to keep the floor thinner. That product's own data sheet then sets the minimum thickness and drying, and it is the sheet we follow.
Because the material barely shrinks, a whole open-plan apartment can go down in big bays with hardly any joints. The design still places some, at door thresholds and between heating zones, and we set out the bays on plan before the first pour. Homes built since 2015 are 6% of the city's stock, and on those new blocks the specification sheet is the starting point for every floor. How the binder itself behaves is covered in our anhydrite screed guide.
Laitance and moisture checks on Brighton and Hove floors
As it cures, the top of a calcium sulphate floor grows a fragile crust called laitance. Tile adhesive, primer and levelling compound all grip it badly. Once drying allows, the crust is sanded off, the dust vacuumed up, and a primer matched to calcium sulphate rolled on.
Moisture testing comes before any finish. Flooring makers often hold calcium sulphate to a stricter moisture figure than cement, so a Circus Street style apartment floor can look ready and still be too damp for timber or LVT. A hygrometer gives the answer, and we write the result down. If the floor is heated, running the system from about 7 days speeds up the drying.
Wet areas need a different screed. In a shower room, wet room or a utility that could flood, go for a cement based flowing screed or sand and cement laid to falls, not calcium sulphate. On converted flats, see also floor levelling in Brighton and Hove for older floors, and for sites in Worthing, anhydrite screed in Worthing.
Anhydrite & Flow Screed prices in Brighton and Hove
Liquid flowing screed (which includes anhydrite): £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 anhydrite and flow screed in Brighton and Hove
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.
Anhydrite & Flow Screed from Slough to Brighton and Hove
Brighton and Hove is about 53.6 miles south-south-east of our Slough base as the crow flies, with postcodes including BN1, BN3, BN2 and BN41. The nearest towns to it are Southwick (4.2 miles), Shoreham-by-Sea (5.7 miles), Peacehaven (6.7 miles) and Lewes (7.6 miles).
More on anhydrite screed, part of our screeding services.