AutoGlassHammond.wikiA sourced reference on Low Price Auto Glass in Hammond and on car glass in Northwest Indiana

Winter windshield damage

From AutoGlassHammond.wiki, a sourced reference on Low Price Auto Glass, Hammond, Indiana, and on windshields in Lake County weather

Compiled by the Auto Glass Hammond Wiki editorial team · First published · Updated

In brief: Freezing water in chips, uneven heating from defrosters and rough roads spread windshield damage in winter. Near Hammond, Chicago Midway averaged about 59 freeze-thaw days a year from 2001 to 2025, mostly December to March[2][6].

Note on sources: AutoGlassHammond.wiki is an independent reference. Facts about the shop come from its website and public listings and are attributed; law, safety and weather facts come from statutes, federal standards and NOAA. Prices, hours and services change; confirm with the shop at (219) 224-6960. See the editorial policy.

Why do windshields crack in winter?

Laminated windshields are two sheets of glass bonded to a plastic interlayer[1]. A chip breaks the outer sheet, and in winter three things can turn it into a crack: water in the chip freezes and expands; the defroster heats the inner surface while the outside stays cold; and potholes and rough roads flex the body and the glass. Near Hammond those conditions come together often: Chicago Midway averaged 59 freeze-thaw days a year from 2001 to 2025, and about 12 a month from December to March[2].

How should I defrost a damaged windshield?

  1. Start the engine and let the cabin warm with the defroster on low before turning it up.
  2. Avoid pointing a heater at full blast directly at a chip or crack on a frozen windshield.
  3. Never pour hot water on a cold windshield.
  4. Use a plastic scraper and a de-icer spray rather than metal tools, keys or credit cards with hard edges.
  5. Clear all the glass before driving, not a peephole; Indiana requires working wipers and an unobstructed view[3][4].

Can scraping damage the glass?

Yes. Grit trapped under a scraper blade can leave fine scratches that scatter headlight glare at night. Metal blades and hard objects can chip the edge of the glass, where cracks start easily. The shop’s own blog has run posts on preventing Indiana winter windshield damage[5]. Worn wiper blades that drag across ice also scratch; replace them before winter. Indiana law requires wipers to be kept in good working order[3].

What should I do when I get a chip in winter?

Cover it with clear tape to keep water and grit out, avoid sudden temperature changes on that spot, and have it assessed soon. The industry’s Repair of Laminated Auto Glass Standard (ROLAGS) allows repair of bullseyes up to 1 inch across, star breaks up to 3 inches and cracks up to 14 inches, but rules out repairs of damage contaminated with impurities that cannot be cleaned out[6]. Water and road salt that work into a chip over the winter can make a repairable chip unrepairable. See chip repair or replacement.

Why is early spring a risk?

March is the peak month for freeze-thaw days at Midway, averaging 12.4[2]. The same cycles break up road surfaces and loosen gravel, so late winter and early spring bring both new chips and spreading cracks. The shop’s blog calls March “peak season for auto glass damage in Northwest Indiana”[5]; that is the shop’s view, but it fits the freeze-thaw pattern.

Can a windshield be replaced in freezing weather?

Yes, but adhesive cures more slowly in cold, dry air. The Auto Glass Safety Council says minimum drive-away times vary with the adhesive and the atmospheric conditions, and that the installer should tell you the time for your job[7]. Mobile winter jobs may need a garage or a warmer day. See safe drive-away time.

Questions and answers

Can the defroster crack a chipped windshield?

Sudden heating of a cold windshield adds stress at a chip; warm the glass gradually.

Why do windshield cracks spread in winter?

Water in the damage freezes and expands, and heating and road shocks add stress.

Can a windshield be replaced when it is below freezing?

Yes, with an adhesive suited to cold weather and a longer wait before driving.

Related articles

Notes

  1. ^ 49 CFR 571.205, Standard No. 205: Glazing materials. Electronic Code of Federal Regulations. Checked 9 November 2026.
  2. ^ a b c Global Historical Climatology Network daily (GHCNd), station USW00014819, Chicago Midway Airport. NOAA National Centers for Environmental Information. Checked 9 November 2026.
  3. ^ a b Indiana Code § 9-19-19-6, windshield wipers. Justia (Indiana Code). Checked 9 November 2026.
  4. ^ Indiana Code § 9-19-19-3, decals, signs, posters, sunscreens, or other nontransparent material. Justia (Indiana Code). Checked 9 November 2026.
  5. ^ a b Service Areas. Low Price Auto Glass (autoglasshammond.com). Checked 9 November 2026.
  6. ^ a b The Right Repairs at the Right Time (ROLAGS repair limits). National Windshield Repair Division. Checked 9 November 2026.
  7. ^ Minimum Drive-Away Times. Auto Glass Safety Council (SafeWindshields.org). Checked 9 November 2026.