Duraco Windows

I purchased Duraco windows in 2005 and received a Lifetime Warranty certificate covering the windows and sealed glass units. The windows have triple glazing, argon and Low E glass. Of 8 sealed units in the Duraco windows, 4 failed (leaked) and clouded up with condensation between the panes after 11 1/2 years. Duraco now says the warranty on sealed units is really only 10 years and refuses to replace the failed sealed units. Poor quality and very deceptive warranty promises. Would not buy again.