What is terrazzo and how is it used?

Terrazzo is a composite surfacing material made by embedding decorative aggregates such as marble, glass or stone into a cement or resin binder, then grinding and polishing the surface. It is widely used in architecture and interiors for floors, worktops, wall cladding and precast elements because it combines durability, design flexibility and long-term performance in high-traffic environments.

Terrazzo is formed from chips of stone or other aggregates set within a binder and finished to create a hard, smooth or textured surface. Traditional terrazzo uses marble chippings in a cement matrix, while contemporary versions may use quartz, granite, glass, recycled materials or construction waste in either cement or resin.

The material has a long history, with references to early forms dating back to Roman or even Ancient Egyptian construction, and it became established in post-war UK building as a cost-effective alternative to solid marble or granite. Today it is specified for its resilience, ease of maintenance and wide aesthetic range, from subtle, fine-grained mixes to bold, large-chip designs. Terrazzo differs from monolithic stone because its appearance and performance can be adjusted by changing the aggregate type, size, colour and binder, giving designers extensive control over the final surface.

The production method depends on whether the terrazzo is cement-based or resin-based, and whether it is installed in situ or as precast elements. In all cases, aggregates are selected, graded and mixed with a binder before being placed, cured and mechanically finished.​

For traditional cement terrazzo, marble or other chips are combined with grey or white Portland cement, which may be pigmented. The mix is laid as a screed (for poured floors) or cast into moulds for tiles and precast components, compacted, allowed to cure, then ground back to expose the aggregate and polished or honed. Resin terrazzo uses epoxy or other resins with aggregates and pigments; the mix is lighter, can be laid thinner and achieves high strength after curing, with similar grinding and polishing stages.

Hand-cast terrazzo, such as bespoke mixes produced in London, is made using traditional casting skills and close supervision throughout the process, followed by intensive polishing to reveal the design. Mechanised production by specialist suppliers allows large sheets to be formed and compressed before cutting into slabs and tiles, providing consistency and efficiency for standard ranges. Grooves, insets and detailed cutting are typically completed using CNC or other precision machinery at the fabrication stage.​

Terrazzo is known for its high compressive strength and good abrasion resistance, making it suitable for high-traffic floors in commercial, public and residential settings. Cement-based systems offer robust performance and can be refurbished through re-grinding and polishing, while resin-based terrazzo provides additional crack resistance and lighter weight.​

Porosity and chemical resistance depend on the binder. Cement terrazzo is porous and requires sealing to protect against staining and moisture ingress. Resin terrazzo is much less porous and more resistant to cracking and crazing, though the binder can be sensitive to UV exposure and heat if used externally. Both types can achieve good longevity if correctly detailed and maintained.

Aesthetically, terrazzo offers a high degree of variability in colour, chip size and distribution. Designers can combine different aggregates, introduce coloured glass or metals, or use pigments in the matrix to control the overall tone. Surface finishes range from polished, which gives a reflective, smooth surface, to honed, brushed or sandblasted for more matte, tactile or slip-resistant effects. Terrazzo also has good thermal conductivity and works well with underfloor heating.

Terrazzo is widely specified for flooring in shopping centres, transport hubs, hotels, schools and healthcare environments because it delivers durable, easily cleaned, continuous surfaces. Poured-in-place terrazzo floors minimise joints and can integrate thresholds, skirtings and movement joints into a coherent finish.​

Precast terrazzo is used for countertops in bars, restaurants and residential kitchens, where the material can be cast into slabs, then fabricated with cut-outs, edge details and upstands. It is also used for vanity tops, reception desks, bar fronts and other joinery-style elements where appearance and robustness are both important.​

Architectural elements made from precast terrazzo include stair treads and risers, plinths for retail and gallery displays, seating blocks, tables and interior or exterior cladding panels. The ability to pour terrazzo into moulds allows complex profiles, curves and integrated features to be created, supporting bespoke design work in commercial and high-end residential projects.​

A key advantage of terrazzo is its combination of durability and design flexibility. Properly detailed and maintained, terrazzo has a long service life and can be refurbished rather than replaced, supporting lifecycle performance. Its continuous or large-format surfaces can reduce grout lines compared to traditional tiling, simplifying cleaning and contributing to a more seamless appearance.​

Terrazzo’s customisable mix design allows architects to control colour, texture and visual intensity in ways that are not possible with many natural stones. It can be tailored to reflect brand palettes, respond to heritage contexts or make use of recycled aggregates and even construction rubble, improving environmental credentials. Resin-based terrazzo also offers reduced thickness and weight compared to traditional cement systems, which can be helpful in refurbishment projects.

Terrazzo is relatively heavy, particularly in cement-based, poured systems, so structural capacity and floor build-ups must be considered at the design stage. Precast components, while more controllable, still require appropriate handling, lifting and fixing methods on site.​

Cement-based terrazzo is porous and can stain or be affected by aggressive cleaning agents if it is not adequately sealed and maintained. Resin terrazzo is more crack-resistant and lighter, but can be more sensitive to UV and temperature, making some systems better suited to internal rather than external use. Both types require skilled installation; poor detailing of joints, movement or substrates can lead to cracking or debonding.

Cost is another consideration. Standard or imported terrazzo ranges can be cost-effective relative to some natural stones, but complex bespoke mixes, thicker sections, intricate cutting or extensive precast work will increase costs. The price is influenced by depth, whether the material is poured, tiled or precast, the finish, edge treatments and installation complexity.

Compared with natural stone such as marble or granite, terrazzo is a composite rather than a monolithic material, and its visual character comes from the mixture of aggregates rather than natural veining. It can be engineered to achieve specific colours and patterns, whereas stone is constrained by geological formation. In many cases, terrazzo can offer a more controlled and repeatable appearance over large areas.

Versus concrete, terrazzo uses selected decorative aggregates and is ground and polished to reveal them, producing a more refined surface with higher design intent. Concrete often has a more uniform, mineral appearance and may not be ground to the same degree. Compared with porcelain terrazzo-effect tiles, genuine terrazzo is a solid material through its depth, allowing regrinding and repair; porcelain mimics the look in a sintered ceramic body but does not have the same inherent reparability.​

For cement-based terrazzo, sealing is essential. A suitable sealer should be applied after installation and periodically renewed to reduce absorption of liquids and staining agents. Routine cleaning typically uses neutral pH cleaners and soft pads or mops, avoiding strong acids, alkalis or abrasive tools that could damage the surface or sealer.​

Resin-based terrazzo is usually less porous but still benefits from careful cleaning with non-abrasive, neutral products. In all cases, spills from oil, wine, coffee and acidic substances should be cleaned promptly to minimise staining or etching. Periodic professional maintenance—such as re-polishing or honing—can refresh the surface and extend its service life, particularly in heavily trafficked commercial environments.

Slip resistance should be considered in wet or external areas, with honed, brushed or sandblasted finishes often preferred to high-gloss polish. Appropriate entrance matting and regular cleaning also help maintain surface performance.​

Because terrazzo performance depends on mix design, binder type, substrate preparation and detailing, specialist input is important from early stages of specification. A specialist can advise on the suitability of cement versus resin systems, thickness, jointing, movement control and compatibility with underfloor heating or external conditions.​

For bespoke terrazzo, expert guidance is essential when selecting aggregates, pigments and finishes, as some materials are too porous or reactive and may discolour or compromise integrity. Sample production and testing are standard practice before full manufacture. Fabrication of precast elements—such as stair treads, complex countertops, integrated furniture or cladding—also benefits from working with an experienced workshop equipped with appropriate cutting and finishing machinery, to ensure dimensional accuracy and durable detailing on site.