Construction Performance Guidelines
EXTERIOR AIR INFILTRATION THROUGH WINDOWS AND DOORS
Windows and doors shall meet the rating for weather tightness required by the Building Code.
One-Year - Work and Materials
Ensure the window or door has been tested to meet the required weather tightness rating. Adjust weather stripping and/or hardware to reduce air leakage by ensuring positive contact along the weather seal.
Doors and windows must be properly closed to ensure positive contact with weather stripping. Doors and windows are manufactured to meet specifications for weather tightness and are designed to withstand reasonable wind loads. Minor exterior air infiltration may occur during very windy conditions. Weatherstripping becomes worn with use and should be inspected and replaced by the homeowner on a regular basis. Interior air movement caused by convection should not be confused with actual air leakage through the window and doors. See Also: 8.7 INSUFFICIENT INSULATION