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70 PhotoIf you are planning to replace a window, you will need to obtain a permit. Plans are required. You may do the work yourself or hire a licensed contractor.

Are There Any Special Requirements?

Yes. If the window opening of a bedroom is being altered to accommodate a different size window, then emergency egress requirements must be met. The opening size must be at least 5.7 square feet. The opening must be a minimum of 20 inches wide and must be at least 24 inches in height. NOTE: The minimum height and minimum width do not equal 5.7 square feet. You must adjust the opening width or height to meet the minimum size requirements. The finished sill height cannot exceed 44 inches from the floor. A pre-inspection can be done to ensure that windows will meet egress requirements.

Safety Glazing is required in:

  • All sliding doors;
  • All windows within a 24-inch arc of either vertical edge of a door when in the closed position and where the bottom edge is less than 60 inches above the floor;
  • All bathroom windows in a shower or bathtub area that are less than 60 inches above the drain inlet;
  • Any window that has an exposed individual pane greater than 9 square feet and the exposed bottom edge is less than 18 inches above the floor and the exposed top edge is greater than 36 inches above the floor and there is one or more walking surfaces within 36 inches horizontally of the plane of the glazing.

Window Flashing

An inspection will be performed to ensure all window flashing has been installed properly before it is concealed. An inspection will then be done when all work is completed. If you are installing retrofit windows that do not require removal of the existing frame, then there is no flashing inspection required, only a final inspection.

Flashing of all exterior openings exposed to weather is required to make them weatherproof. Use 15 lb. asphalt-saturated felt whenever possible for flashing material. Caulk back of window frames before setting. Use windows that are watertight. Line wire, when use as backing to support water-resistant building paper or felt beneath lath for stucco should be installed according to industry standards and practice. Neither the attachment devices nor the wire backing should cover or penetrate flashing material. Peripheral flashing at all edges of wall openings must cover wire backing.