If you have old wood windows, their sap is unappealing to termites, and your steel windows have strong hardware and quality functioning systems. The wood or steel windows you have don’t have all the little plastic parts that break on new windows and they can be made to last for decades with little care. Why pay a fortune and fill up landfills, buying lower longevity new windows, when you have original windows that fit the style of your home? It is cheaper, and greener to fix the ones you have than buying new out- gassing vinyl windows!
A word about your EXISTING VINYL WINDOWS: After 10-25 years your vinyl windows can be overhauled to have inner mechanical plastic parts (springs and rollers) replaced, bringing another 10-25 years of life to your window.