All screed material proportions are based on the use of the following materials.

a) Portland cement of strength class 42,5 N. If cements of other types and/or classes are used, then constituent material proportions might need to be adjusted in order to achieve screeds of similar strength characteristics to those recommended. Definitive guidance on their use in cement sand screeds is not available at the time of publication.

  • b) Dry aggregates. Due allowance should be made for the moisture content of any damp materials used.

Where the thickness of the levelling screed is 50 mm or greater, consideration should be given to the use of fine concrete to minimize water demand and hence drying shrinkage. However, there is a risk of a lower standard of fine closed finish when using 4/10 aggregate in the screed.

Interior Screed Ltd are the UK’s leading floor screeding contractors specialising in all types of floor screeding systems. Established in 2010 and working with many of the biggest and most prestigious names in the residential and commercial building sector’s we install screeds into building developments of all sizes. From complex large-scale commercial projects to residential and mixed-use contracts, we carry a comprehensive range of floor screeding products and services designed to offer our customers a one-stop floor screeding facility.

With 6 regional offices, we are uniquely positioned to provide a local service to our customers throughout the UK, promoting sustainable working relationships.

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