When sunshine hits a double-pane window, the air inside heats causing the sealed window unit to expand and push air out through th... Window Genie Show all Persistent Fogging: Condensation or fog trapped between the glass panes that cannot be wiped away from either side. Visible Water Droplets: Moisture or droplets often appearing first in the corners of the window during temperature shifts. Glass Distortion: A rainbow-like tint, oily appearance, or the panes bowing inward due to pressure changes from gas loss. Drafts and Noise: A noticeable chill near the glass or an increase in outside noise getting through the window. Unusual Dirt: Windows that look dirty or streaky despite being thoroughly cleaned on both the inside and outside. Window World of the Port City +8 Common Causes Solar Pumping: The daily cycle of the window heating up (expanding) and cooling down (contracting) puts constant stress on the sealant until it cracks. Age and Wear: Standard vinyl windows often last 15 years, while older or lower-quality units may fail in as little as 5 to 8 years. Improper Installation: If a window isn't perfectly square or the correct tools aren't used, uneven pressure can cause the seal to fail prematurely. Environmental Factors: Prolonged exposure to standing water at the frame's edge or harsh UV rays can degrade seal materials like silicone or polyurethane. Renewal by Andersen of Eastern NY +6 Repair vs. Replacement Glass Unit Replacement (IGU): In many cases, you can replace just the "insulated glass unit" (the panes and spacer) without replacing the entire frame, which is often the most cost-effective solution. Full Window Replacement: Recommended if the frames are rotting, warped, or if the window is very old and inefficient. Temporary Defogging: Some services drill holes to vent moisture, but this is a cosmetic fix that does not restore original insulation or gas. Window Genie +2 Check if your windows are still under
The most obvious symptom is condensation between the glass panes. This occurs when the desiccant is saturated, and the temperature of the interior glass surface drops below the dew point of the trapped moist air. This often manifests as a milky fog or mineral streaks (etching) left behind by evaporated water. broken window seal
To understand failure, one must understand the construction. A standard IGU consists of: When sunshine hits a double-pane window, the air
Here’s what happens: Double- or triple-pane windows have a sealed space (usually filled with argon or krypton gas) to improve insulation. When that seal fails, moisture gets in, condensation forms, and the gas escapes. Glass Distortion: A rainbow-like tint, oily appearance, or