How to Make Terrazzo Floors

Terrazzo flooring consists of small marble chips, glass pieces or colorful stones embedded in a concrete base and polished to a high shine. Terrazzo floors are labor-intensive to create and time-consuming to install. In the past, trained artisans usually installed terrazzo floors. Today, however, if you have the patience and talent, it is possible to install one on your own. The project will, however, require some special tools.

Things You'll Need

  • Polyurethane sheeting
  • Cement
  • Marble chips, glass pieces or small stones for aggregate
  • Cement trowel
  • Planetary concrete grinder
  • 50-, 100-, 200-, 400-, 800-, 1,600- and 3,200-grit diamond grinding disks
  • Wet/dry vacuum
  • Right-angle grinder with diamond grinding disks
  • Terrazzo seal

Instructions

    • 1

      Have your floor evaluated by a structural engineer to make sure that the subflooring is strong enough to withstand the weight of the terrazzo. Terrazzo is made of concrete and is much heavier than other types of flooring.

    • 2

      Lay plastic or polyurethane sheets over the subfloor to protect the wood from warping or rotting from the moisture in the concrete. Even after the cement is dry, moisture can continue to deteriorate the wood.

    • 3

      Pour cement over the sheeting covering the subfloor. While the cement is still wet, scatter whatever aggregate you have chosen over the top. Spread the aggregate and then trowel the cement with the embedded aggregate to a smooth, even finish. Allow the cement to dry for at least two days.

    • 4

      Start the grinding process with 50-grit diamond grinding disks attached to the planetary grinder and begin grinding off the top of the cement and aggregate. Keep the area wet while grinding and work in small sections at a time. Vacuum the slurry created by the grinding using a wet/dry vacuum before moving on to a new section. Repeat this process using progressively finer grinding disks until you finish the final polishing with 3,200-grit disks.

    • 5

      Use a right-angle grinder, starting with 50-grit disks, to grind and polish the edges and corners of the floor where the planetary grinder cannot reach. Continue polishing with the right-angle grinder using progressively finer disks until the edges and corners have been polished to the same degree as the rest of the floor.

    • 6

      Follow the floor polishing by applying a coat of terrazzo sealer to protect the floor. Allow the sealer to dry according to the manufacturer’s recommendations before allowing foot traffic.

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References

  • “1001 Ideas for Floors: The Ultimate Source Book: Flooring Solutions for Every Room”; Emma Callery; 2008
  • Photo Credit Сement floor, great for backgrounds and textures image by Andris Daugovich from Fotolia.com

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