At some point, repairs may be too costly or time-consuming and replacement may make more sense. But, before you invest in a complete replacement of all components, consider some less-expensive alternatives:
The performance and durability of windows is tied closely to weather-stripping. Materials such as polyurethane, mylar, neoprene, and EPDM rubber are ideal for Minnesota’s climate because they remain flexible under temperature extremes.
As with windows, weatherstripping of doors is important, especially since most doors are opened and closed more frequently than windows. Materials such as polyurethane, mylar, neoprene, and EPDM rubber are also recommended for doors. Special attention should be paid to the threshold seal at the bottom of the door; subject to considerable wear from foot traffic, it should be durable and flexible.
In addition, since all weatherstripping will have to eventually be replaced, it is important to have materials that are easy to remove and install and are readily available.
Windows option - If the basic frame of the window is in good or repairable condition, a jamb and sash replacement may be an economical and efficient choice.