Vertical A term used to indicate when something such as a pole is at 90 degrees to a horizontal surface.
Vice versa A term used to indicate that it may be possible for a condition to be in two separate but opposite states at different times.
Visqueen vapor barrier A vapor barrier of poly ethylene plastic. The vapor barrier is usually black when used under concrete slabs.
Vitreous clay A clay with a glazed surface that will not absorb water. Vitreous clay tile liners are usually installed in fireplace flues of site fabricated fireplaces.
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