Wall tile |
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A glazed tile with a body that is suitable for
interior use and which is usually nonvitreous, and
is not required nor expected to withstand excessive
impact or the capillaries.
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Warpage |
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A concave or convex curvature of a tile so that the
surface is not perfectly flat.
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Water absorption |
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The ability to take up and retain water.
Water-cement ratio. The ratio of the amount of
water, exclusive only of that absorbed by the
aggregates, to the amount of cement in a concrete or
mortar mixture; preferably stated as a decimal by
weight.
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Water level |
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The water level is a piece of clear plastic hose
3/8" to 1/2" in diameter and usually about 50' in
length. It is filled with water, from which all air
must be removed.
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Waterproof membrane |
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A membrane, usually made of built-up roofing, to
provide a positive waterproof floor over the
substrate, which is to receive a tile installation
using a wire reinforced mortar bed. (CTI)
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Wearing course |
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A topping or surface treatment to increase the
resistance of a concrete pavement or slab to
abrasion.
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Weathering |
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Changes in color, texture, strength, chemical
composition or other properties of a natural or
artificial material due to the action of the
weather.
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Welded-wire fabric |
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A series of longitudinal and transverse wires
arranged substantially at right angles to each other
and welded together at all points of intersection.
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Welded-wire fabric reinforcement |
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Welded-wire fabric in either sheets or rolls, used
to reinforce mortar and concrete.
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Well-graded aggregate |
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Aggregate having a particle size distribution which
will produce maximum density, i.e., minimum void
space.
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Wet areas |
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Interior or exterior tiled areas subject to periodic
or constant wetting. Examples: showers; sunken tubs;
pools; exterior walls; roofs; exterior paving and
interior floors. (CTI)
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Wet pressing |
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See Pressing, wet. Wet process. See Process, wet.
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Wetting |
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The thorough impregnation of a material by a liquid.
The more viscous a fluid, and the higher its surface
tension, the more difficult it is for the liquid to
"wet" materials. Certain additives, for example,
water softeners, reduce surface tension, or
viscosity and improve wetting properties, allowing
the material to flow out more.
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Wetting agent |
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A substance capable of lowering the surface tension
of liquids, facilitating the wetting of solid
surfaces and permitting the penetration of liquids
into the capillaries.
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Whiting |
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Calcium carbonate powder of high purity. (ASTM C
242).
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Wire mesh |
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See Welded-wire fabric.
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Wood float |
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The wood float is sometimes used in place of the
flat trowel for floating mortar. It is good for
smoothing small irregularities left on the mortar
bed, working the surface of the mortar before
troweling on the pure coat, or compacting floor and
deck mortar.
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Workability |
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The property of freshly mixed concrete or mortar
which determines the ease and homogeneity with which
it can be mixed, placed, compacted, and finished.
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Wrinkled sheets |
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Pertaining to ceramic mosaics mounted on paper. Due
primarily to rough handling in shipment. |
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