Most window problems after an install are small and can be fixed by the installer. Write down what you see, take photos, and contact the installer in writing first. Here is what common problems mean and what to do.
Why is my new window leaking?
A leak around a new window usually means a gap in the sealant, flashing that does not lap the right way, or blocked weep holes at the bottom of the frame. Water inside the glass is a seal failure. Note when the leak happens, such as in wind-driven rain or only when sprinklers hit the wall, and tell the installer in writing.
Is condensation on new windows normal?
Condensation on the inside surface of new windows on cold mornings can be normal. Tight new windows let less moist air escape, so moisture shows on the glass. Run bathroom and kitchen fans and open blinds. Condensation between the panes of a new window is not normal and is a seal problem.
What if my new window will not lock or close?
A new window that will not lock or close smoothly is often out of adjustment or was set slightly out of square. It should be fixed by the installer, not forced. Check that nothing is in the track. Do not leave a bedroom window that will not open, since it may be an escape route.
What if my stucco or drywall cracked after the install?
Small cracks in stucco near a full-frame window can come from cutting and patching, and hairline cracks in old stucco can open when an old frame comes out. Drywall can crack at the corners of the opening. Take photos, measure, and ask the installer how it will be repaired. Large or growing cracks may point to a framing problem.
Who covers a problem: the manufacturer or the installer?
The window maker's warranty covers defects in the product, such as a seal failure or broken hardware. Any installer warranty covers the work, such as leaks from poor flashing. Read both in writing. Register the product with the maker if it asks you to, and keep the invoice and the NFRC labels or order numbers.
Where can I file a complaint about a window contractor in California?
You can file a complaint with the Contractors State License Board. The CSLB says it will investigate any complaint filed against a license, and when it fits, it will try to mediate between you and the contractor. It can issue citations and order corrections, but it cannot guarantee you will get money back. Small claims court is another option.
What if the installer will not come back?
If the installer will not come back or does not respond, send a written request by email and certified mail, with photos and a date to reply. Keep copies of the contract, the invoice and every message. If that fails, file a complaint with the CSLB, contact the window maker for product issues, and consider small claims court.
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This is general information about California, Fresno-area and federal rules, not legal or tax advice. For your own home, check with the office named or a qualified professional.