Fog between panes + good frame = replace the glass only. Fog + rot/cracks = replace the whole window. Word count: ~750 For specific pricing, contact local glass shops or window repair specialists—prices vary by region and glass type (low-E coatings, tinting, etc.).
Double pane windows (also known as insulated glass units or IGUs) are a staple in modern energy-efficient homes. They consist of two panes of glass separated by a spacer and a layer of gas (usually argon or krypton) or air. This design drastically reduces heat transfer, lowers energy bills, and dampens outside noise.
However, double pane windows are not indestructible. When they fail, they rarely break the glass—instead, the seal fails. The most common sign is . Once that happens, the window loses most of its insulating ability.