Screen opening in a foundation wall to allow ventilation under a structure so that moisture and condensation are kept to a minimum amount.
Foundation wall
Wall that extends from the footing to the first floor.
Fountain
(1) A natural spring of water. (2) An artificial spring or jet of water, often over a structure.
Fountainhead
Surfacing material with a solid color and the appearance of soft textured stone, which is often used on countertops.
Four-way switch
Switching device that uses three switches to permit an outlet to be operated from all three switches. Also called a double-pole reversing switch, this electrical switch is used in conjunction with two three-way switches in cases where three points for controlling an electrical circuit are needed.
Fourpenny
Designation of a nail size; a 1-1Ú2 inch long nail.
Foyer
Entrance hall. A gathering place for people either before exiting or upon entrance, as in a movie theatre.
Fraction
Part of the whole.
Fractional horse power motor
An electric motor rated at less than one horse power (hp).
