What Is Cement Screed Floor

A screed concrete floor is simply a layer of finer concrete laid on top of a pre existing and cured concrete base.

What is cement screed floor.

Screed is usually applied on top of the concrete slab and is most commonly used as a finishing layer on internal floors or to level the floor prior to final floor coverings carpet tiles natural stone linoleum wood flooring resin coatings etc. 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. A floor screed is usually a cementitious material made from a 1 3 or 1 4 5 ratio of cement to sharp sand. Screed is a thinner layer of concrete which s typically poured over a base floor to help form a smooth floor coating to provide a strong foundation for the top floor.

1 tonne of flooring grit or sharp sand mixed at 4 sand to 1 cement will cover approximately 15 square metres of floor when laid at 40mm thick. 3 sands or 1 portland cement. Laying a level floor screed over a large area is difficult and to do so by eye requires years of experience. Screeds generally follow a mix proportion of 1cement.

The screed is usually a simple cement aggregate and sand mix but proprietary screed mixes exist for specialist use. Screed is not concrete while the chemistry between the two isn t too dissimilar the concrete creation process is almost identical there are a few key differences that. There are many proprietary screeds on the market and information about these can be obtained from the manufacturer. Floor screed is a simple mixture of water ordinary cement and graded aggregate such as sharp sand to create a smooth hardwearing sub floor.

It usually laid to be about 75mm thick and should always be laid by a skilled professional. 3 coarse aggregate 10 mm maximum aggregate size should be considered if the floor screed thickness is greater than 40mm.