Glossary of Industry Terms



Gauging trowel

The gauging trowel is larger than the pointing trowel but smaller than the buttering trowel. Tilesetters prefer the 31/4″ x 7″ size.

Gillmore needle

A device used in determining time of setting of hydraulic cement.

Glass mosaic tiles

Tiles made of glass, usually in sizes not over two (2) inches square and Y4 inch thick, mounted on sheets of paper. Usually sheets are twelve (12) inches square.


A ceramic coating matured to the glassy state on a formed ceramic article. The term glaze also refers to the material or mixture from which the coating is made. (ASTM C 242).

Bright glaze

A high-gloss coating with or without color. (ASTM C 242).

Clear glaze

A transparent glaze with or without color. (ASTM C 242).

Crystalline glaze

A glaze that contains microscopic crystals. (ASTM C 242).

Fritted glaze

A glaze in which a part or all of the fluxing constituents are prefused. (ASTM C 242).

Mat glaze

A low-gloss ceramic glaze with or without color. (ASTM C 242).

Opaque glaze

A nontransparent glaze with or without color. (ASTM C 242).

Raw glaze

A glaze compounded primarily from raw constituents. It contains no prefused materials. (ASTM C 242).

Semimat glaze

A medium-gloss ceramic glaze with or without color. (ASTM C 242).
Speckled glaze. A glaze containing granules of oxides or ceramic stains that are of contrasting colors. (TCA)

Glaze fit

The stress relationship between the glaze and body of a fired ceramic product. (ASTM C 242).


Process of filling tile joints with grout (TCA) Glazed ceramic mosaic tile. Ceramic mosaic tile with glazed faces. (ASTM C 242).  A glazed tile with a body that is suitable for interior use and which is usually nonvitreous, and is not required or expected to withstand excessive impact or be subject to freezing and thawing conditions. (ASTM C -242).

Glazed paver tile

See’ Pavers.

Glazed quarry tile

See Quarry tile.

Glazed tile

Tile with a fused impervious facial finish composed of ceramic materials, fused into the body of the tile which may be a nonvitreous, semivitreous, vitreous, or impervious body. The glazed surface may be clear, white, or colored. (ASTM C 242).

Glazed tile, extra duty glaze

Tile with a durable glaze that is suitable for light duty floors and all other surfaces on interiors where there is no excessive abrasion or impact. (ASTM C 242).

Glost fire

See Fire, glost.


A predetermined degree of slope that a finished floor should have.


A rich or strong cementitious or chemically setting mix used for filling tile joints. (TCA)

Grout, colored

See Colored grout.

Grout saw

The grout saw is a saw-toothed carbide steel blade mounted on a wooden handle. It is used to remove old grout. It also is used in patching work. Care should be used as it can easily damage adjacent tiles. The carbide steel blade is brittle, and it will shatter if it is dropped or abused. On front of the saw blade is a spring steel tip, used for scraping grout out of corners where the saw blade cannot reach.


Process of filling tile joints with grout. (TCA). Grout scrubbing pad. A nonscratch nylon pad impregnated with abrasive used for cleaning grout off tile. Hairline cracking. Small cracks of random pattern in an exposed concrete surface.