Technical Data

Technical Data Of The Terra -Stone Slim Line Terrazzo Tiles

Calibrated in the Classic Polished and Lava Stone Ranges

Calibration of the underside of the tile, for the above listed ranges ensures a cement based ceramic tile adhesive can be used, saving time and costs in installation, compared to the conventional screed system which is much slower and requires bedding each tile individually for standard Terrazzo tiles.  Specialized expensive tile adhesives used for porcelain tiles are not recommended. See (VIII) below for the actual thickness of each range.

Approximately 50% less water absorption properties

The chemically modified formulation and the high pressure at which the tiles are compressed (excluding the Carpet Stone range) reduces water absorption prior to the application of any surface sealer to ±3% ensuring the tiles are far less likely to stain. With one essential coat of our approved sealer after installation, the tiles become resistant to stains, provided the sealant is reapplied from time to time in high traffic areas, as it shows signs of wear.

Pre-Sealed and Pre-Packed in protective cardboard boxes

The packaging ensures the tiles are protected during transport and on site handling with laying instructions detailed on the box. The factory applied sealant provides protection from on site trades during installation etc...

Textured Non-Slip Lava Stone & Carpet Stone Ranges

Terra-Stone is also available in a textured, non-slip finish for outdoor floor applications or wet areas.  Ask for our “Lava Stone” or “Carpet Stone” non slip, slim line ranges, which are comfortable under foot in wet or dry conditions and ideal for pool surrounds,
outdoor piazza areas, patios, corridors, landings and external staircases etc...

Quality Standard

Complies to EN 13748-1 for internal use and EN 13748-2 for external use of 2004 with regards to:-
*Thickness *Shape tolerances *Breaking strength *Abrasion *Slip/Skid resistance *Durability of slip/skid resistance *Weathering resistance *Water absorption *Fire performance *Thermal conductivity.

Laying Specifications

1.  Lay tiles on a clean stable concrete or masonary substrate, using a non marking rubber mallet to ensure tiles are laid evenly with the least lippage possible, using a quality guaranteed cement based ceramic tile adhesive. Ensure each tile is fully bedded and supported throughout, ensuring there are no unsupported areas. Lay tiles with a 3-5mm joint in the 300mm format and use a 5-8mm joint for the 600 and 800x800mm format. Tiles are to be laid in a grid format. Grouting provides support to the tiles after laying and this should take place between 24 and 48 hours after laying. For walls composed of wood or dry walling, a suitable paste tile adhesive
must be used. On exterior areas, ensure the tiles are laid to a fall, to allow adequate drainage and prevent pooling of rain water, which could cause problems later. We recommend Unilock ceramic tile adhesive (Porcelain tile adhesive should not be used).

Ensure after completing the tiling or grouting procedure, the tiles are left clean each day, wiping them clean with a damp sponge. No tile adhesive or grout is to remain on the face of the tiles for more than 1-2 hours prior to cleaning.

Prior to grouting, ensure the tile joints are clean and have been dampened. Mix UFT Terrazzo Grout in a matching colour or any other quality quarry grout, in small amounts with minimal water, to a crumbly almost semi-dry consistency. Then use a trowel to work the grout between the joints. Compress the grout into the joint using a round pointing or jointing trowel, leaving a smooth compressed joint finish. Ensure any excess grout is brushed clean, carefully removing any grout between the aggregates in the tile, soon after grouting. Wet the grout the day after installation, for best curing.

Allow movement joints on floors every 4,5LM or where there are existing construction or expansion joints in the substrate. On suspended floor slabs expansion joints must be provided every 3LM. Flexible joint fillers must have “no oil content”, as the oil is absorbed into the tile, leaving unsightly dark edges. Acrylic based silicon is recommended as the flexible filler. Where tiles are laid in a staggered bond system, this system should only be used internally due to thermal stresses in the external environment and ensure to provide expansion joints in both directions.

In a construction environment, cover the newly laid tiles with plastic or non-marking boarding until final handover, to avoid damage and soiling by following trades. Ensure red clay soil is not left on the tiles during construction.

Sealing procedure of the tile

Once laid and grouted, an additional coat of “SQT Union Sealer” for the “Rustico and Lava Stone ranges” is to be applied. Tile surface to be clean and dry prior to sealing with an even thin coat using a clean lamb’s wool roller.

Apply two thin even coats of SQT Tile Sealer with a clean lamb’s wool roller, to ensure ease of maintenance, for both the tile and grouted areas after installation. Tile surface is to be clean and dry prior to sealing.

For high traffic areas, such as restaurants and shopping malls, applying SQT Dresser on top of the sealers detailed in points 1 or 2, after the floor has been cleaned by the floor maintenance staff, will provide a buffable, protective sacrificial coating.  This further enhances the gloss finish and prolongs the life of the sealants beneath, and stain resistance of the tile. The SQT Dresser can be maintained by applying it using a trigger spray bottle and applying it to isolated worn high traffic areas or an area where the sealer may be scuffed and is then buffed removing any scuff marks using a white 3mm pad attached to a mechanical floor scrubber.

General Maintenance

Areas should be re-sealed from time to time depending on exposure to direct sunlight, and the extent of foot traffic in the area. Only neutral soap detergents should be used to clean and maintain the Terra-Stone tiles on a regular basis. We recommend SQT Natural Stone Detergent, a highly effective neutral degreasing soap, available from Union Tiles outlets. Dish soap must not be used to clean or maintain Terrazzo tiles!


Acid based cleaners, thinners, strong ammonia cleaning chemicals and acetone should never be used on the tiles. Acidic cleaning chemicals will corrode the surface of the tiles, while ammonia and acetone will damage the protective sealant! Ensure red clay soil is not left on the tiles during construction, as the fine clay particles may permeate the surface and stain the tiles. Paint spillages
should be avoided by covering the tiles with drop-sheets. Do not mix tile batches in one area, always keep different batches in separate areas.


Website designed by Moonstone Direct