All IG units have a life cycle attached in which over time the Seal will breakdown causing moisture to develop between the two panes. Generally builder grade glass manufacturers will provide for a 10 year warranty for seal failure.
Window Films can cause glass breakage. Certain film types can absorb too much heat and cause a thermal crack on the interior pane of glass. Most films are tested and approved for IG Units however in some cases if there is a slight crack or imperfection in the glass some may cause thermal cracking.
Most film manufacturers will provide for a 5 year warranty against thermal breakage which is typically the time an imperfection if present will show itself.
← Window Films do not cause seal Failure on Insulated Glass (IG).