When is storm season in Denver, CO?

Denver's primary peril is hail and the active window runs April – September. The metro averages roughly 3.8 hail days and 16 damaging-wind days per year.

What building code applies to a re-roof in Denver?

Denver adopts the 2021 IRC. Class 4 impact-resistant shingles widely incentivized. 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 Denver carrier estimate?

Drip edge at eaves and rakes (IRC R905.2.8.5). Starter strip at eaves and rakes per manufacturer instructions. Ice barrier at eaves where the jurisdiction requires it (IRC R905.1.2).

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hail risk · April – September

Denver, CO storm damage roofing guide

Denver's hail season is unusually long, April through September, and the Front Range urban corridor can take repeat strikes in a single summer. Denver builds to the 2021 IRC, and Class 4 impact-resistant shingles are widely incentivized and increasingly specified by HOAs. When the insured upgrades to Class 4, fastening and underlayment requirements change with the product — price the upgrade as its own line rather than folding it into the shingle.

3.8

Hail days/yr

Wind days/yr

716K (metro 2.9M)

Population

Recent major storms

June 18, 2024
Baseball hail across Aurora and Centennial
August 3, 2023
EF-1 tornado + hail across Highlands Ranch

Code adoption

Denver adopts the 2021 IRC. Class 4 impact-resistant shingles widely incentivized.

Confirm with the authority having jurisdiction — local amendments vary inside the metro.

Check these against a first scope

· Drip edge at eaves and rakes (IRC R905.2.8.5).
· Starter strip at eaves and rakes per manufacturer instructions.
· Ice barrier at eaves where the jurisdiction requires it (IRC R905.1.2).
· Detach and reset of accessory items — vents, gutters, satellite, solar — where the slope is replaced.

Top carriers in Denver

· State Farm
· USAA
· American Family
· Allstate

Read the full CO supplement law guide

Storm-ready tools for Denver contractors

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Hail damage roof inspection

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Denver storm claim questions

When is storm season in Denver, CO?: Denver's primary peril is hail and the active window runs April – September. The metro averages roughly 3.8 hail days and 16 damaging-wind days per year.
What building code applies to a re-roof in Denver?: Denver adopts the 2021 IRC. Class 4 impact-resistant shingles widely incentivized. 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 Denver carrier estimate?: Drip edge at eaves and rakes (IRC R905.2.8.5). Starter strip at eaves and rakes per manufacturer instructions. Ice barrier at eaves where the jurisdiction requires it (IRC R905.1.2).

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