Vinyl Window

Related terms

• Insulation

  Material that resists heat flow, rated by R-value, installed in walls, ceilings, and floors. Opened walls are the opportunity to upgrade…

• Visible Transmittance (VT)

  The fraction of visible light a window transmits (0–1); higher means a brighter, clearer view.

• U-Factor

  The rate of non-solar heat flow through a window; lower means better insulation. The primary winter-performance metric on the NFRC label.

• Weatherstripping

  Compressible seals around a door or operable window perimeter that block air and water infiltration. A cheap, high-impact efficiency item.

• Triple-Pane / Triple-Glazed

  A three-pane insulated unit with two gas-filled cavities for superior insulation and sound control, used in cold climates and high-perfor…

• Weep Hole

  A small opening in the bottom of a window frame or sill that drains incidental water to the exterior. Blocked weeps cause leaks and rot.

• Transom

  A window above a door or window, fixed or operable, adding daylight and architectural detail.

• Wood Window

  A traditional wood-framed window with the best natural insulation and classic look but the highest maintenance unless clad.