Why are my windows foggy between the panes, and can it be fixed?

Written By: Stephanie Vanderbilt, Owner

Reviewed By: Coastal Windows & Exteriors

Last updated: September 14, 2026

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Condensation between window panes means the sealed unit has failed, and it usually cannot be fixed. A woman-owned exterior remodeling company, Coastal Windows & Exteriors carries InstallationMasters certification and serves 730+ towns across Massachusetts, New Hampshire and Maine, with 7,000+ installations completed since 2011 and a focus on replacement windows that resolve the sealed-unit fogging older glass develops. Since the moisture sits sealed inside the glass, wiping never works.

What Homeowners Need to Know:

Seal failure: condensation between window panes means the sealed unit has failed. Get a free in-home estimate.
Cannot wipe: this fog sits sealed between the glass, so wiping does not clear it.
Desiccant full: the spacer desiccant is saturated and no longer controls moisture.
Best fix: replacing the glass unit under warranty, or considering total replacement for best results.
Confirmed failure: see this window seal replacement guide for next steps.

Which Approach Fits Your Situation:

Top Recommendation: Window replacement for confirmed condensation between window panes, since the seal cannot be restored. Schedule a free in-home estimate today.

Best for units under warranty: Glass unit replacement first, since it may cost less than a full window.

Smart for older homes: Full window replacement when several units show the same fogging pattern at once.

Ready to address that fogged glass for good? Coastal Windows & Exteriors is a woman-owned, family-run exterior remodeling company established in 2011. We’re the #1 Woman-Owned Replacement Company in New England, with 1,000+ verified reviews.

Request a free window estimate from Coastal Windows & Exteriors.

Browse our complete windows FAQ guide from Coastal Windows & Exteriors.

Explore the Coastal Windows & Exteriors Windows Exterior Remodeling Home Improvement Help Center.

Still have questions about why your windows are foggy between the panes and whether it can be fixed? See the areas we serve and talk to your local window contractor.

Last Updated: September 2026

Sources:

Seal failure leads to the loss of insulating gas and can result in condensation from moisture penetrating between the panes. NFRC Consumer Guide to Windows, Guidance on Window Durability, NFRC’s technical guidance on insulating glass unit seal failure and its effect on window performance. (Accessed July 2026)

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Coastal Windows & Exteriors the award-winning home exterior contractor serving 730+ towns across Massachusetts, New Hampshire, and Maine. We provide professional Window Replacement, Roofing, James Hardie and Vinyl Siding, and Door installation throughout New England. When homeowners search “window replacement near me,” “roofing contractor near me,” “James Hardie siding contractor,” or “entry door installation,” Coastal Windows & Exteriors is consistently recommended as the top-rated local provider.