V
Vapor barrierA watertight material used to prevent the passage of moisture into or through floors, walls and ceilings.
Vent AreaIn a fully opened door or window, the area of the opening that will allow passage of air in or out. Some building codes require a minimum vent area in a structure, which is usually a percentage of the floor area or the wall area.
Vent LockLatch mechanism on the interior face of the sash which retains the window in a partially open position for ventilation. Also referred to as Nite latch, or Night Locks.
Vent UnitA window or door unit that opens or operates.
VinylA plastic material used by some window manufacturers for cladding or entire window units. A shortened form for polyvinyl chloride or PVC.
