Cricket - A second roof built on top of the primary roof to increase the slope of the roof or valley. A saddle -shaped, peaked construction connecting a sloping roof with a chimney. Designed to encourage water drainage away from the chimney joint.

Balusters - Vertical members in a railing used between a top rail and bottom rail or the stair treads. Sometimes referred to as 'pickets' or 'spindles'.

Grid - The completed assembly of main and cross tees in a suspended ceiling system before the ceiling panels are installed. Also the decorative slats (munton) installed between glass panels.

Throat - The opening at the top of a fireplace through which smoke passes enroute to the flue.

Buy down - A subsidy (usually paid by a builder or developer) to reduce monthly payments on a mortgage.

Square - A situation that exists when two elements are at right angles to each other. Also a tool for checking this. An area of roofing which is 10' square or comprising 100 square feet.

Compressor - A mechanical device that pressurizes a gas in order to turn it into a liquid, thereby allowing heat to be removed or added. A compressor is the main component of conventional heat pumps and air conditioners. In an air conditioning system, the compressor normally sits outside and has a large fan (to remove heat).

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