Decision guide

Foggy or Broken Window: Repair or Replace?

Q: Should I repair or replace a foggy window?

Repair ($150–$400) makes sense for one isolated fogged unit on a solid frame. Replace ($400–$1,100) wins when the frame is old, several windows fail, or you're keeping the house.

By Sunny Park, Founder & EditorUpdated July 12, 2026

Sunny Park founded WindowQuoteGuide and researches replacement-window pricing across U.S. markets, turning contractor quotes and public cost data into plain-English guides homeowners can actually use.

Quick answer: Repair ($150–$400) makes sense for one isolated problem on a solid frame. Replace ($400–$1,100) wins when the frame is old, several windows are failing, or you're keeping the house — because cost-per-year, not cost-today, is what matters.

Repair or replace — the fork every aging window eventually forces.

The one question that settles it

Every foggy, drafty, or cranky old window forces the same fork in the road: patch it, or pull it. The honest answer isn't “always replace” (that's the installer talking) or “always repair” (that's denial). It's a simple cost-per-year calculation.

Don't ask “what's cheaper today.” Ask “what's cheaper per year I actually keep it.”

Repair vs. replace, by the numbers

Typical repair

$150–$400

Typical replacement

$400–$1,100

A repair looks cheaper — and sometimes it genuinely is. But a $250 reseal that buys you 3 more years costs about $83/year. A $700 replacement that lasts 20 years costs $35/year. The “expensive” option is often the cheaper one, stretched over time.

The decision box

🟢 Repair wins when

The frame is solid, it's one or two windows, the problem is isolated (just fog, or just a draft), and you plan to keep the house short-term.

🔴 Replace wins when

The frame is old or rotted, several windows are failing, you've got fog AND drafts, or you're staying put — where 20-year windows crush repair on cost-per-year.

The trap to avoid

Repairing one window a year, every year, for a decade. Homeowners do this because each repair feels small — but ten $250 repairs is $2,500 spent to keep decades-old windows on life support. At some point the drip-drip of repairs quietly outspends the replacement you kept avoiding.

If you're seeing failures spread from window to window, that's the signal. One bad window is bad luck. Three is a pattern — and patterns don't get cheaper.

Frequently asked questions

Should I repair or replace a foggy window?

Repair ($150–$400) makes sense for one isolated fogged unit on a solid frame. Replace ($400–$1,100) wins when the frame is old, several windows fail, or you're keeping the house.

Is repairing a foggy window cheaper than replacing?

Cheaper today, not always per year. A $250 reseal lasting 3 years is about $83/year; a $700 replacement lasting 20 years is about $35/year, so replacement often costs less over time.

What's the trap with foggy-window repairs?

Paying for repeated glass-only fixes on an old, failing frame. If the frame is near end of life, each repair buys little time and you replace anyway.

Get a replacement number before you sink money into another repair

60 seconds. Your ZIP. A regional range you can actually plan around.

Get your estimate →

Cost figures in this guide are compiled from publicly available 2026 U.S. pricing data — including ENERGY STAR, the U.S. Department of Energy, and national contractor cost guides (HomeAdvisor / Angi True Cost) — and are intended for planning only. Prices vary by region, brand, and installation method; always collect 2–3 local quotes.

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