Often a building has a history of unexplained glass breakage. The unexplained glass breakage could be caused by a wide variety of different factors.
If the amount of unexplained glass breakage exceeds 1% of the total amount of glass exposed, caution should be exercised. Window film should not be applied until the causes of the breakage can be logically identified and explained. Many of the causes of glass breakage can stem from conditions that are unique to the building and will continue or be enhanced with the addition of film.
Such items as surface and edge damage and shade patterns or interior shade devices may be the contributors to unexplained breakage and thus it is important to closely investigate each situation. Past building records should be sought to verify if any clues can be uncovered to ascertain the probable causes of the unexplained glass breakage.
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