wind risk · April – August
Chicago, IL storm damage roofing guide
A high-labor-cost metro with dense permit requirements. Chicago builds to the 2018 Chicago Construction Code with a 105 mph wind design speed, and the collar counties operate under their own adopting authorities — confirm which applies before you scope. Wind, not hail, is the dominant peril, April through August.
1.8
Hail days/yr
12
Wind days/yr
2.7M (metro 9.5M)
Population
Recent major storms
- July 12, 2024EF-1 tornado and 80mph straight-line winds across Cook County
Code adoption
Chicago adopts the 2018 Chicago Construction Code. Wind speed design 105 mph.
Confirm with the authority having jurisdiction — local amendments vary inside the metro.
Check these against a first scope
- · Full fastening pattern required by the manufacturer for this wind design speed.
- · Ridge and hip cap replacement, not re-use.
- · Underlayment replacement where the deck is exposed (IRC R905.1.1).
- · Detach and reset of accessory items — vents, gutters, satellite, solar — where the slope is replaced.
Top carriers in Chicago
- · State Farm
- · Allstate
- · American Family
- · Country Financial
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Chicago storm claim questions
- When is storm season in Chicago, IL?
- Chicago's primary peril is wind and the active window runs April – August. The metro averages roughly 1.8 hail days and 12 damaging-wind days per year.
- What building code applies to a re-roof in Chicago?
- Chicago adopts the 2018 Chicago Construction Code. Wind speed design 105 mph. Confirm the requirement with the authority having jurisdiction before you finalise a scope — adopting authorities and local amendments vary inside the metro.
- Which code requirements should I check against a Chicago carrier estimate?
- Full fastening pattern required by the manufacturer for this wind design speed. Ridge and hip cap replacement, not re-use. Underlayment replacement where the deck is exposed (IRC R905.1.1).
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