Windows in Louisville fail in river air that swells wood and never quite lets it dry. Older sashes stick all summer, stream in the morning, and gap when a cold snap finally arrives. Builder vinyl in the eastern suburbs fogs when the seal dies and stays cloudy. A storm panel that rattles on a Victorian is noise, not a seal. If the room is clammy or drafty and the equipment is running, suspect the opening.
Tall plaster openings and brick surrounds show every gap. An insert in a punky, swollen sill leaves the rot. Full-frame work is worth it when the stool is mush and wasteful when the wood is sound. Many older fronts still have ropes or balances that quit. Painted-shut bath windows are common in shotguns and cottages. Say what the sill feels like, and keep chalking paint out of the room.
Windows under a tree canopy or over a low porch stay wet and rot first. Ask how the frame is flashed and what fills the gap so humid air does not sit in the wall. Interior stops and an outside cap finish the job. West walls take the storms that roll up the valley. North walls stay shaded and soft. Fog in one builder unit is a clue about that age, not a command to replace every opening sight unseen.
Hardware can be saved when the frame is solid. Forcing a swollen sash cracks the rail. Say the floor and whether the bad unit faces the street, the alley, or the backyard. Tight old lots change access. A hard freeze still happens, but the dominant damage is moisture, and the call should sound like that. Do not describe a Louisville sash as if it lived under months of lake ice.
Count the sashes that stick in humid weather or rot over a low porch, not every tall window on an older front. Say if the stool is soft from splash and river air rather than from weeks of ice. A cottage bath window is a different opening from a suburban back bedroom. Call the number on this page.