Window replacement in Hobart, IN for homes fighting condensation

Condensation forms when humid indoor air meets a surface cold enough to pull the moisture out of it. Your glass is almost always the coldest surface in the room, so it collects water first and gets the blame.

Hobart has its own version of this. Lake George sits in the middle of town, held back by the dam at its outlet, and air on the streets nearest the water carries more moisture than air a mile inland. Add a full basement with its own damp load, and the indoor humidity your windows fight starts higher than elsewhere in Lake County.

Whether the window is causing it or your house is causing it is worth sorting out before you spend money. The window is the problem when moisture sits between the panes rather than on the room-side surface, which is a failed insulated unit that ventilation will never clear; when the glass edges frost while the center stays clear, pointing at a conductive metal spacer; or when single-pane glass or an aluminum frame runs cold enough to condense in almost any weather.

Your house is the problem when every window wets up at once, including the newer ones; when bathrooms have no working exhaust, or the kitchen vents into the room instead of outside; or when rooms with the doors shut are worst overnight and the basement smells damp.

Often it is both. An older home near the lake with original double-hung sash and no bath fan has a cold-surface problem and a humidity problem in the same rooms.

Condensation runs down the glass and pools where the sash meets the sill, and wood does not survive that. Paint blisters, the sill checks and softens, and the bottom rail of the sash goes spongy at the joint. In the early-1900s homes near historic Third Street and the downtown district, the plaster below the window shows it too — staining, chalking, then a soft patch under the apron. Left long enough, moisture reaches the framing inside the wall, and a wiped sill becomes carpentry.

The point of window replacement here is a room-side surface warm enough that your indoor air stops condensing on it. What moves that number: warm-edge spacers instead of conductive metal, keeping the glass perimeter — where condensation starts — closer to room temperature; low-conductivity frames and multi-chamber profiles, so the frame itself is not a cold bridge; insulated glass with a low-e coating and an inert gas fill to slow heat loss through the pane; weatherstripping that compresses properly, so cold air is not washing down the glass; and full-perimeter insulation with an interior air seal behind the trim, keeping the wall around the opening warm.

New windows raise your glass temperature. They do not remove moisture from your air. If your home generates more humidity than it can exhaust, better windows move the condensation elsewhere — a wall corner, a closet, the coldest spot in the basement — rather than end it. We will say so when ventilation is the larger half of the problem.

Around the lake and through downtown, original wood sash, brick and vinyl exteriors and full basements are the norm under maple and oak shade. In the newer subdivisions south and east — toward Deep River County Park and the Wood's Historic Grist Mill, past Festival Park and the Oak Savannah Trail — the windows are newer, but sealed units still fail and the same window installation questions come up.

Our shop is in Gary, a short run from Hobart. A visit lets us see where the moisture is collecting, how the house is venting, and which windows need replacing now versus which can wait.