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What fails on a house, why it fails, and what it should cost

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Windows · You can handle this one

Broken thermal seal still under warranty

Many insulating units carry long glass warranties that survive changes of ownership. Look for the spacer stamp between the panes before paying.

Quick answerIf a double-pane window has fogged, check for a warranty before you pay for glass. Many insulating glass units carry long warranties, and many of those transfer to a new owner when the house sells. The spacer between the panes often carries a stamp with the maker’s name or a date code. That stamp, the window brand and your closing paperwork are what you need to file a claim. You can handle this one yourself. No call needed.

People pay for glass they could have had for free, or for the cost of labor, simply because nobody checked the warranty. It takes a flashlight and a phone call.

1Why it’s often covered

  • Seal failure is the classic warranty claim. Glass warranties are written for exactly this.
  • Long terms. Glass coverage is often longer than coverage on the rest of the window.
  • Transferable. Many warranties transfer to a new owner, sometimes with conditions such as a registration step or a shorter term. Read yours.

2How to check

  1. Confirm it’s the sealIf fog stays after you wipe both sides of the glass, the seal has failed.
  2. Read the spacerShine a flashlight at the strip between the panes. Note any brand name, date or code printed on it.
  3. Find the window brandCheck the frame, the hardware or the glass corner for a logo or label.
  4. Gather paperworkClosing documents, the seller’s disclosures or the original installer’s invoice may name the product and warranty.
  5. Contact the makerCall or use the manufacturer’s warranty page with photos, codes and the window size.

3Getting it fixed

Do it yourself

  • Find the stamp and brand, and file the claim
  • Ask exactly what’s covered: glass, labor, or both
  • Keep a record of the claim and any reference number

Hire a pro

  • The warranty covers glass but not installation
  • No warranty applies and you want a glass-only replacement
  • The window is upper-story or very large
Get it in writing

If a contractor says the warranty doesn’t apply, ask for the reason in writing and check it with the manufacturer yourself.

4What drives the cost

Whether the warranty covers glass only or glass and labor, the size and type of the glass, and the height of the window. Without a warranty, glass-only replacement is still usually far cheaper than a new window.

Windows cost

5Questions

I bought the house used. Does the warranty still apply?

Often, yes. Many glass warranties transfer, sometimes with conditions. Check with the manufacturer.

What if there’s no stamp on the spacer?

Look for the brand on the frame or hardware, and check your paperwork. The manufacturer can often identify the product from photos.

Does the warranty cover labor?

Some do and some don’t. Ask before scheduling the work.

Written by Jaylan Jones. I Like To Exterior Services earns a referral fee when a call connects to a contractor. See our business-model disclosure.