Dear Jim: I need to upgrade my old wood windows, but I like how the frames look. They don't stay open now and the single-pane glass is not efficient. How can I switch to double-pane glass and tighten ...

Windows are durable, but they do not last forever. The experts at This Old House say the life span of home windows is between ...

While there's no disputing the charm of original sash windows, if you've moved into a period property, due to their potential age, you may find them less energy efficient than other types of windows.