(1) Any of various devices used to protect or screen from light. (2) Degree of darkness of a color. (3) A shadow where light is diffused.
Shading
A dark and light appearance that sometimes occurs in darker asphalt shingles, due to the slight differences in manufacturing combined with the diffusion of light.
Shading coefficient
A measure of window glazing performance that is the ratio of the total solar heat gain through a specific window to the total solar heat gain through a single sheet of double-strength glass under the same set of conditions; expressed as a number between 0 and 1.
Shadowing
(1) Defect, in a painted surface, which shows the shades being slightly changed when viewed from different directions. (2) Visible edges of wallboard joint tape.
Shaft
(1) The main, cylindrical part between the ends of a column or pillar. (2) A vertical opening passing through the floors of a building. (3) The long stem or body of a tool or weapon. (4) A bar that supports or transmits motion to a mechanical part of an engine.
Shaft lock
The shaft lock is a feature that locks a motor's output shaft into place, thereby making it easier to perform bit changes with one wrench.
Shaft wall
The walls around a vertical opening that passes through the floors of a building.
Shake
Thick wooden shingle, hand cut from logs, used for roofing or siding.
Shake painter
A rectangular-shaped flat pad with an attached handle that is used to paint shingles, shakes, and other special surfaces and areas.
