The Difference between Concrete and Screed - The Screed ...
Screed on the other hand is a thin layer of cement paste and sand/ fine aggregates, laid on to a concrete floor base or underfloor heating to act as a smooth flat levelling surface for taking on the final floor finish. Screeds generally follow a mix proportion of 1Cement: 3-5Sand (0-4mm washed sharp sand for levelling screeds).