Had casement and slider windows installed in the 90s. to replace aluminum windows. noticed condensation problem on replacements; called Tri-State to have those defective windows replaced for free (under 10 year warranty) a couple of times because condensation gets between the panes and the window isn't clear anymore (dirty looking); the warranty has expired now and i'm stuck with the condensation problem. called them up to ask about this but was told would have to pay to get them replaced. would not recommend since these replacement windows need to be replaced; bad home improvement investment.
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