Why Windows Develop Condensation

Condensation forms when warm, humid indoor air contacts a cold surface. In Newberg, winter mornings bring exterior temperatures into the 30s and 40s, which cools window glass. When warm air inside your home touches that cold glass, moisture condenses and drips onto the sill. This happens most often in bathrooms, kitchens, and bedrooms, where humidity is naturally higher. Older single-pane windows and poorly sealed frames make the problem worse because they allow more heat transfer.

How Window Condensation Causes Mold

Water that condenses on windows does not evaporate quickly in winter because indoor humidity stays high. The moisture soaks into wood sills, drywall, and any porous material near the window. Once those materials stay damp for more than 48 hours, mold colonizes them. You'll notice black spots on sills, staining on drywall below windows, or peeling paint. Mold releases spores into the air, which can cause respiratory symptoms and allergic reactions.

How to Reduce Indoor Humidity

Run exhaust fans in bathrooms during and after showers. Use range hoods when cooking. Vent clothes dryers outside, not into the home. Run a dehumidifier in winter to keep indoor humidity below 50 percent. Open windows briefly on warmer days to exchange humid indoor air with drier outdoor air. Check that your HVAC system is properly sized and functioning. Oversized systems cycle too quickly and do not remove enough humidity.

Professional Mold Remediation and Humidity Control

We inspect windows, measure indoor humidity, and locate mold growth on sills, frames, and surrounding drywall. Then we remove contaminated materials, treat surfaces with antimicrobials, and dry everything thoroughly. We also assess your ventilation system and recommend upgrades if needed. If humidity issues are severe, we can install a whole-home dehumidifier that integrates with your HVAC system and maintains optimal levels year-round.

Insurance and Condensation Mold

Mold from condensation is usually excluded as a maintenance issue. However, if condensation resulted from a sudden event like HVAC failure or a roof leak that allowed humid air to accumulate, there may be coverage. We document the timeline, photograph all findings, and provide a detailed scope. If any part of the loss is covered, we handle the claim.

If condensation is causing mold around your windows, call for a free inspection. We'll remove the mold, fix the moisture source, and restore your home to safe, healthy condition.