Premfloor have experience over a wide variety of tiling projects. Terrazzo tiles mainly come in two different thicknesses, being 28mm or 20-22mm. The underside of the 28mm tiles is uneven, but since they are normally bonded into a fresh sand-cement screed, this unevenness is irrelevant. To achieve a uniform tile thickness, the backing can be ground off to produce calibrated tiles. These are generally around 22mm and can be laid straight into adhesive. Finishing of either system is by means of grouting, grinding and sealing.
Cementitous in-situ terrazzo is a hand finished screed laid between 10 and 25mm. It is a blend of pigmented cement, chippings and water. In-situ traditions came from Italy, dating back to the 12th century, and require specialist knowledge. Due to cement shrinkage, when designing an in-situ floor, control strips (or 'bays') must be planned in. Distances between control strips vary depending on thickness of screed, reinforcement and substrate. Most common materials for the strips are brass, stainless steel or aluminium. Cementitous in-situ terrazzo is suitable for indoor or outdoor use, although slip potential must be considered.
Resin Terrazzo (a.k.a Terroxy) is an alternative system using epoxy, polyurathane or MMA as the coloured binding matrix. Using resins as opposed to cement, gives the end user a different range of installation options. For example, resin terrazzo doesn't contain any water thus will not shrink meaning no regular expansion/control joints are required. Resin terrazzo is also very fast setting with the MMA option curing in up to 2 hours, allowing for fast track installation and foot traffic during the day over an installation. Resin also has a high chemical resistance and without regular joints makes it an ideal seamless option for pharmaceutical and factory usage.
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