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  • A metamorphic rock, slate forms from the low-grade metamorphosis of the sedimentary rock, shale (“mud stone”).
    Like its precursor, slate is a very fine-grained rock consisting of microscopic clay minerals combined with
    microscopic quartz and calcite. Some slates also contain a few of the minerals found in granite, resulting in iridescent
    or hard surfaces. The alteration of shale by heat and pressure produces the pronounced partings (cleavage) that give
    slate its layered characteristics.

  • Slate’s color originates from trace metals present during its formation. The colors visible in most slates are the result
    of splitting the stone along natural layers, exposing the metals to the atmosphere and allowing them to oxidize (rust).
    The natural color variations in slate enhance the beautiful details that make each installation a unique showpiece.

USES
  • • Interior and exterior flooring
  • • Walls
  • • Roofing materials
  • • other special applications

TYPES
  • • Natural Cleft (ungauged / uncalibrated): Cutting along the natural layers creates an uneven, undulating surface.
  • • Calibrated (gauged): Cutting each piece to a relatively uniform thickness.
  • • Tumbled: Rounding edges and corners achieves an antique look.

SPECIAL CONSIDERATIONS
  • • Natural shade variations are inherent in slate. Be sure to inspect multiple samples of the stone before selection to
    ensure satisfaction with colors and patterns.
  • • Shaling (material splitting from the surface) is possible. This will cease over time.

MAINTENANCE
  • ~Do clean slate with a dust mop and neutral cleaner to remove most dirt.
  • ~Do use a penetrating sealer to prevent staining. Because slate is quite porous, excessive water may cause reactions
    such as oxidation (rust), spalling, deterioration of dry veins, etc. “Special Impregnating” sealers are recommended to
    avoid these problems.
  • ~ Do clean natural stones with “special stone cleaners”, “pH balanced cleaners” or “neutral base cleaners.”
  • ~Do not clean any natural stone with acidic cleaners, including (but not limited to) vinegar or cleaners with “lemon” or
    “lime” on the label. These products will abrade the polish from the stone. Sealers DO NOT protect polished surfaces
    from these types of cleaners.
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