Category 3 Water

As defined by the Institute of Inspection Cleaning and Restoration Certification, Category 3 water is grossly contaminated and can contain pathogenic, toxigenic or other harmful agents and can cause significant adverse reactions to humans if contacted or consumed....

Coping Flashing

The flashing detail placed over the top of an exposed wall at the roof or at horizontal interfaces between siding materials.  In the case of a wall cap it is usually composed of metal, used to cover or shield the top of the wall below and cover the top of the upper...

Weatherhood

The hood or deflector on a vent opening that is intended to prevent rain water and undesired unconditioned air entry.

Weir

A barrier across a stream of liquid that is used to divert or measure flow per unit of time.

Whisker coils

Whisker coils refers to air conditioning coils where there are no flat plate fins but heat transfer is accelerated by whiskers of metal attached to a tube carrying the liquid used for heating or cooling.