Foggy Double Pane Windows: Repair or Replace in Germantown, MD?
Why Double Pane Windows Fog Up Between The Panes If the fog is between the panes, the window is telling you that the insulating seal has broken down. Wiping the outside will not solve it, and neither will indoor humidity control alone. A failed seal is common in older double pane windows, especially where the original sealant, spacer, or desiccant has aged out. Sun exposure, seasonal expansion and contraction, and poor installation all shorten the life of the unit.