Anhydrite grades for Abingdon-on-Thames apartments and plots
On a set of drawings, a calcium sulphate screed appears as a short code. Read CA-C25-F5 from left to right. The letters CA mean calcium sulphate, C25 is 25 N/mm2 in compression and F5 is 5 N/mm2 in bending, both figures defined by the European standard that covers screed materials.
Three grades cover most work. Lightly used domestic floors get CA-C20-F4. Houses, flats and offices normally take CA-C25-F5, and floors that will work harder take CA-C30-F6. We pour the grade the specification names, not a near equivalent.
Alpha hemihydrate screeds are a separate option. A specifier picks one when the floor has to dry quicker or go down thinner, and its depth, drying and heat-up all come from that product's own data sheet.
Why calcium sulphate for an apartment floor? Because it hardly moves as it dries, one pour can cover a big bay with few joints, and it runs round heating pipes and across acoustic layers without leaving gaps. Before pumping we mark where the bays and joints go, so that any joint lands at a doorway or where one heating zone meets the next.
Conversions need the same care. The old gaol in the town is now flats and shops, and in any converted building the existing structure decides what depth and grade will work. If you are comparing this with other flowing screeds, the anhydrite screed guide explains the material, and flow screed over heating pipes covers depths above a wet system.
Sanding, testing and priming anhydrite in Abingdon-on-Thames
Pouring the screed is only half the job. Three steps decide whether the flooring on top stays down.
Laitance comes first. As the material cures, a thin and weak skin builds up on top. Once the floor is dry, that skin must be sanded off and vacuumed, or adhesives and compounds will grip the skin instead of the screed and can fail. Our floor preparation service covers this if your own trades are not doing it.
Moisture testing is next. Flooring makers are often stricter about moisture in calcium sulphate than in cement, so the pass mark is lower than most people expect. A hygrometer test shows where the floor stands. If the flat has underfloor heating, it can normally be run from around day 7 to speed the drying, which helps when the handover date is close.
Priming is last. Once sanded and dry, the floor gets a primer that suits calcium sulphate before any cement based adhesive or compound goes on.
One rule sits above all three. Keep calcium sulphate away from wet rooms, plant rooms, outside areas and anywhere else water may sit. Those spaces take a flowing screed with a cement binder instead, and both can be poured on one job. Our drying and laitance advice comes to you in writing.
Anhydrite & Flow Screed prices in Abingdon-on-Thames
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 Abingdon-on-Thames
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 Abingdon-on-Thames
Abingdon-on-Thames is about 29 miles west-north-west of our Slough base as the crow flies, with postcodes including OX14. The nearest towns to it are Didcot (4.7 miles), Oxford (5.7 miles), Wantage (8.4 miles) and Kidlington (10.5 miles).
More on anhydrite screed, part of our screeding services.
