General Description

McIntyre PIEDRAS TILES are formed from wet clay, hand finished and hand glazed and single fired to 2400 degrees F. Each tile has a flat back and cushioned edge.

Standard Specifications

McIntyre Tile conforms to ANSI 137.1 as Special Purpose Tile. Our tiles are produced, graded and packed to our stated specifications. When requested by the purchaser prior to production, a Master Grade Certificate may be issued certifying compliance with properties mutually agreed upon by purchaser and McIntyre Tile. Generally, a Master Grade Certificate should be requested when the tile is specified for a commercial floor or any exterior use.

How to Specify

Glazed, high fired McIntyre PIEDRAS TILES in actual size __________________ (specify actual size) and color ___________________ (specify glaze name) as manufactured by McIntyre Tile Company, Healdsburg, California. Tile shall have a flat back, a cushioned edge, and shall be fully vitrified (absorption less than 3%). Tile shall conform to ANSI 137.1 as Special Purpose Tile. Allow 6-10 weeks production time at time of purchase order was received to production completion.


This tile is made to order and are therefore subject to production limitations and order volume fluctuations. For purposes of specification please check with the factory or your local distributor for verification of delivery.

Color Variation

McIntyre Piedras glazes are layered and will vary from tile to tile. Variations are more pronounced than single glazed tiles. When specifying a McIntyre Piedras glaze, always work from a sampling of 3 or more tiles which represent the range of variations. Display samples show typical variations you can expect. The proportion of each variation is subject to the actual fire conditions and may vary somewhat from lot to lot.


Some crazing may occur after firing. All ceramic glazes are eventually subject to this effect.

Frost Proof

McIntyre Tile has a water absorption of less than 3% (vitreous) and is suitable for use in pools and spas for both interior and exterior applications.


Installation procedures should conform to the Tile Council of America "Handbook for Ceramic Tile Installation" (current edition). The layout should be evenly spaced on each surface and maximize the use of full tiles. Grout joints should align. Avoid grouping tiles of the same hue or value. Choose stacks of tiles from several different cartons to achieve the best overall blend of color.

Grout Space Allowance

McIntyre is sized modular with a square foot space, allowing a 3/16" grout joint throughout. A narrower grout spacing can be used including "tight", however, additional tiles will be required to cover a given area. Close grout spaces accentuate tile irregularities. When cutting tiles, use a diamond saw or if using the score-and-break method, cover the tool where it pushes against the tile with tape to protect against marking the tile.


Colored grout pigments can discolor the surface of any glazed tile. The hairline fractures in the PIEDRAS glazes may absorb grout pigments. A penetrating sealer may be used to minimize staining from colored grout pigments. Always test before using. Do not apply any materials to your tile without first satisfying yourself, by testing, that the result will be satisfactory.

Durability Considerations

Depending on specific site conditions, all glazed tile are subject to wear over time. To determine the suitability for specific applications, each McIntyre glaze has been tested and ranked on the MOHS scale and classified according to hardness and recommended use. Light colors and matte glazes are a better choice in heavy use areas rather than dark colors and gloss finished glazes because scratches on the tile surface are less apparent. A means must be provided for people to clean abrasive materials off their shoes before walking on a glazed tile floor.

Piedras Metallic Glazes

Some PIEDRAS tiles incorporate metallic glazes: 161 & 101. The glazes are non-toxic in both manufacture and usage. The glaze surfaces are sensitive to oxidation and must be protected. It is pre-sealed at the factory. Periodically the sealer must be renewed to protect the metallic quality. These glazes are NOT suitable for areas where abrasion, water and/or strong chemicals are present. Pre-test any sealers or grout releases before general use. Some products will discolor the glaze/metal surface. McIntyre Tile will not be responsible for discoloration to this tile from chemicals or moisture.


Minimal maintenance is required. Mild soaps should be sufficient for most cleaning. For persistent stains, stronger cleaners (even mild acids) may be used on the tile (except for Metallic glazes), but care must be taken to avoid contact with the grout, especially if a colored grout has been used. Test any cleaners before general use.