Grades on a Beam Park or Rainham specification
On a Rainham or Beam Park specification, an anhydrite screed is identified by a code from the European standard covering screed materials. Read the C number as how hard it resists crushing and the F number as how well it resists bending, each given in N/mm2. Most drawings name one of three:
CA-C20-F4, meant for lightly used domestic floors. CA-C25-F5, the general grade on most house, flat and office drawings. CA-C30-F6, for a floor expected to work harder.
Whatever grade the engineer has written for a new home is the grade that goes in; we do not swap it for something else. Now and then the drawing names an alpha hemihydrate product, chosen because it dries sooner or can be laid thinner. Depth and drying for those come from the manufacturer's own sheet, which we work to.
Apartment floors are where the material earns its place. In Havering, 20% of homes are purpose-built flats, and a flat is typically one large floor over insulation, often with an acoustic layer and heating. Because this material hardly moves as it cures, a whole flat can often go down as a few big bays with very few joints. Where a joint is unavoidable, we agree its line with you before the pour, normally across a doorway or along the edge between two heating zones.
For readers who want the chemistry, our guide anhydrite screed explained goes further. Delivery and placing are handled by our own team, and the screed pumping service page explains how.
Sanding and testing before Havering floors are finished
As the floor dries, a fine, crumbly film called laitance comes up to the surface. Glue spread over it only holds that film, and the flooring can let go months down the line. So when drying has gone far enough, we sand that layer off and apply a primer made for calcium sulphate.
Moisture is the other test. Many flooring manufacturers set a tighter moisture limit for calcium sulphate than for cement, so a reading that would pass on a cement screed can still be too high here. A hygrometer reading decides, not the calendar. Where heating pipes are in, running the system from roughly day 7 can speed the drying along.
New blocks around Beam Park run to tight programmes, and 6% of the borough's homes date from 2015 or later. Our drying and laitance steps are given to the flooring contractor on paper, so nothing gets skipped.
Keep it out of any room that could get wet. In Havering, a wet room, a shower you walk into or a utility floor that might see a leak should have a cement based flowing screed, or the hand-laid option on our Havering sand and cement page.
Anhydrite & Flow Screed prices in Havering
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 Havering
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 Havering
Havering is about 37.1 miles east of our Slough base as the crow flies, with postcodes including RM11, RM1, RM13 and RM5. The nearest towns to it are Barking and Dagenham (4.2 miles), Brentwood (5.4 miles), Redbridge (6.4 miles) and Chigwell (6.9 miles).
More on anhydrite screed, part of our screeding services.
