07931771952

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SAND & CEMENT SCREED FROM EXPERTS IN WORKSOP IN THE UK

Professional Screeding NATIONWIDE SERVICE
T: 07931 771952
E: [email protected]

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TYPES OF SAND AND CEMENT SCREED

We offer a wide range of sand & cement screeds to suite all residential and commercial applications. We specialise in supply and installed of both site batch screed and pre-mixed screed (batched in a screed plant).

Sand and Cement screed is commonly achieved by mixing cement with sharp sand. The most common ratios for sand and cement are 1:3, 1:4, 1:5 but modified cement can be mixed at 1:6, 1:7 and 1:8 ratios.

The mixed screed can be applied as:

  • Bonded: the screed is placed directly onto a concrete floor using a bonding agent or a slurry mix. 
  • Unbonded: A suitable damp proofing membrane is placed on the substrate and the sand & cement screed is then installed on to the membrane. 
  • Floating: this process similar to the unbonded method, but the screed is installed on the top of a floating insulation layer. This type of screed is installed in applications where underfloor heating systems. 

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    Polypropylene fibres are used when mixing the screed to minimise shrinkage and cracking. In some applications (most commonly in commercial), reinforcement is achieved by inserting a fine mesh constructed from metal or glass.

The two most common sub categories of Sand & Cement screed are:

  • Traditional Sand & Cement
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    • Fast Drying Sand & Cement
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    Advantages of Semi-Dry Screed:

  • Efficient Installation: Semi-dry screed is easily spread and levelled, leading to faster installation times.

     

  • Reduced Shrinkage: The controlled moisture content minimizes the risk of cracking and shrinkage.

     

  • Improved Workability: Contractors benefit from enhanced workability, allowing for precision during the application process.

     

  • Enhanced Thermal Conductivity: Well-suited for use with underfloor heating systems, providing efficient heat transfer.

     

  • Drying time: for this type of screed is 1 day for every 1mm of depth, up to 40mm and then 2 days for every 1mm after that depending on air temperature. For example, a 60mm traditional screed will take 80 days to dry fully.