Just to clarify, the warranty problem is not with double paned windows but with double pane "E-Glass" windows. BTW E-Glass windows already have a protective film/coating applied at the factory.
Some protective film is approved for E-Glass that will not void a manufacturers warranty or the film company itself will provide/extend the manufacturers warrany, while others are not. Window film can provide a great service to some people but this is not a case where you simply should not get the cheapest product out there. You need to ask specifics depending upon what type of windows you already have in your home..
|