Windows in Vermont face a long cold and a lot of interior moisture from cooking, bathing, and wood heat. Single glass ices at the sill. Storms that do not latch trap water against the sash and rot it. Village houses have odd openings that have settled for generations. Farmhouse ells have windows on walls the heat barely reaches. Say which room and which wall, because a kitchen pane and a north ell pane fail for different reasons.
A soft sill, fallen putty, and a snapped cord are separate repairs. A stock unit forced into an old frame leaks at the foam when wind drives snow at the wall. Look at the apron. The stain means water or heavy condensation has already been at work. Fog between panes is a dead seal. Sweat on a single pane may be the stove and the lack of a fan, not a reason to tear out the elevation.
Large cold glass will always feel cold on a Kingdom night. That is not the same defect as rotten wood. Know which complaint you have. A window that is a way out of a sleeping room has to open after the repair. Weights and pockets are worth keeping if the wood is sound. If a key sinks into the sill, the opening needs carpentry, not a cord. Shutters screwed to the wall hide the damage and seal nothing.
Exterior trim and glazing have a limited season before the cold locks the work, but the call can still sort repair from replacement while the snow is on the ground. Say whether you can reach the outside now or only describe it from indoors. Brick and post-and-beam openings are often odd. Mention storms. A bath window in the splash zone is a rot factory in a house that already runs humid in winter.
List the bad openings and the rooms. Say repair or replacement. Have the town and whether the house is a village building or a farmhouse. Call the number on this page.