What Is Cement Screed Floor

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.

What is cement screed floor.

The screed is usually a simple cement aggregate and sand mix but proprietary screed mixes exist for specialist use. 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. Laying a level floor screed over a large area is difficult and to do so by eye requires years of experience. There are many proprietary screeds on the market and information about these can be obtained from the manufacturer.

3 coarse aggregate 10 mm maximum aggregate size should be considered if the floor screed thickness is greater than 40mm. 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. If the thickness of the floor screed does not exceed 40mm then the recommended mix is 1 portland cement. 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.

It may be applied onto either a solid in situ concrete ground floor slab or onto a precast concrete floor unit. Floor screed is a simple mixture of water ordinary cement and graded aggregate such as sharp sand to create a smooth hardwearing sub floor. A screed concrete floor is simply a layer of finer concrete laid on top of a pre existing and cured concrete base. A floor screed is usually a cementitious material made from a 1 3 or 1 4 5 ratio of cement to sharp sand.

It usually laid to be about 75mm thick and should always be laid by a skilled professional. Screeds generally follow a mix proportion of 1cement.