Anhydrite grades for Seaford apartments and new homes
Purpose-built flats are 16% of Seaford's homes, and 5% of all homes were built between 2000 and 2014. These are the floors where a designer will typically write a CA grade on the drawings.
The grade is a strength label set by the European screed standard. C stands for compressive and F for flexural strength, measured in N/mm2. A quiet domestic floor can be CA-C20-F4. Most flats, houses and offices are specified at CA-C25-F5. Busy shared corridors and other heavier use get CA-C30-F6. Where the drawings do not say, we suggest one to fit how the floor will be used.
Within calcium sulphate there is also a group of alpha hemihydrate products. They are chosen where a faster drying time or a thinner section is needed, and each has its own product sheet that sets depth and drying guidance.
Low shrinkage is the material's main practical advantage. It allows large bays with few joints, which is useful across a whole apartment level or a long open-plan ground floor. Doorways and changes in the structure still need joints, so the layout of bays is drawn up ahead of the pour.
Keep it out of anywhere that could get wet. A wet room or plant area takes a flowing screed based on cement, or hand-laid sand and cement, in its place.
Finishing anhydrite floors in Seaford before flooring
Pouring a calcium sulphate screed is half the job. While it cures, laitance forms on top, a thin skin with little strength that must be removed. When the floor has dried we sand that skin off, vacuum up the dust and prime with a product made for calcium sulphate. Cement based primers and adhesives are not automatically suitable, so the product choice matters.
Moisture testing comes before any flooring. Flooring makers often allow less moisture in calcium sulphate than in cement, so a reading that would pass for tiles on a cement floor can still fail here. A hygrometer test gives the answer, not a date on the programme. Where pipes are fitted, the heating can normally help dry the floor from around day 7.
On housing schemes, the written drying and laitance notes let the site manager and flooring contractor sign off each plot in turn. The floor preparation service covers any extra surface work, and our anhydrite screed explained guide goes into the material in more depth. For apartment schemes further along the coast, see anhydrite screed in Peacehaven.
Anhydrite & Flow Screed prices in Seaford
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 Seaford
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 Seaford
On the map, Seaford sits south-south-east of Slough, about 61.8 miles from our base in a straight line (postcodes including BN25), next to Newhaven (2.9 miles), Peacehaven (4.7 miles), Polegate (7.2 miles) and Eastbourne (7.8 miles).
More on anhydrite screed, part of our screeding services.
