A Properly Installed Window Must…

Window Cross SectionThe installation of a window into a wall must:

  • Protect the structural integrity of the window in that, the window should not support any load other than its own weight.
  • There must be an air tight seal around the window.
  • There must be continuous and unbroken thermal insulation between the frame of the window and the wall.
  • There must be some allowance for differential movement between the window and the wall opening.
  • And finally, that installation must serve to maximize the performance of the energy-efficient features of the window.