Wood eating insects that superficially resemble ants in size and general appearance, and live in colonies.

- A ceramic material molded into masonry units.

Thermal conductance is the same as thermal conductivity except it is based on a specified thickness of material rather than on one inch as used for conductivity.

The rate of heat flow through one square foot of Btu per hour when a temperature difference of one degree Fahrenheit is maintained between the two surfaces.

A finish plaster used to produce rough, textured finished surfaces.

A thermal conducting material that conducts heat through an insulated assembly of materials.

The process of heat transfer through a solid by transmitting kinetic energy from one molecule to the next.

Material with a low thermal conductivity that is inserted between materials, such as metal with high thermal conductivity, to slow the passage of cold or heat through the highly conductive material.

A finish-floor material made up of concrete and an aggregate of marble chips that after curing is ground smooth and polished.

A hard unglazed clay tile used for ornamental work.

All materials expand and contract to some extent with changes in temperature. The Thermal Coefficient of Linear Expansion is expressed in "Inches Per Inch Per Degree Fahrenheit." Example: gypsum board has a coefficient of 9.0 x 10-6 in. per in. per °F. This means that with an increase in temperature of 50°, a gypsum board wall 100 ft. in length will have a linear expansion of .54" or an excess of 1/2". The expansion characteristics of some other building materials are more pronounced; a 50° temperature increase would produce expansion in a 100' length of approx. 3/4" in aluminum, 3/8" in steel and 1/2" in concrete.

The behaviour of a material when subjected to a change in termperature.

A process in which heated plastic sheets are made to assume the contour of a mold by using the force of air pressure, vacuum, or mechanical stretching.

Resistance of a material or assembly to the flow of heat. It is the reciprocal of the heat transfer coefficient: (1/C, or 1/U)For insulating purposes, low "C" and "U" values and high "R" values are the most desirable.

Heat transmission by the circulation of a liquid or heated air or gas.

Cured plastics that are chemically cross-linked and when heated will not soften but will be degraded.

Plastics that soften by heating and reharden when cooled without changing the chemical composition.

Exterior laminated sheathing nailed to the exterior side of the exterior walls. Normally ¼ " thick, 4 X 8 or 4 x 10 sheets with an aluminumized surface.

A material that has a high resistance to heat flow.

The transmission of heat from a hot surface to a cool one by means of electromagnetic waves.