Key numbers
39 verified hail storms with stones of 1.75 inches or larger reached Boulder County, which includes Louisville, from 1990 to 2025 in the storm records we keep; the largest measured 4.5 inches (softball size) on July 13, 2011 (NOAA NCEI).
| Hail storms by decade, 1990 to 2025 | 1990s: 2, 2000s: 18, 2010s: 13, 2020s: 6 Source: Storm library: Denver metro hail history |
|---|---|
| Largest hail | 4.5 in. (softball), July 13, 2011 Source: NOAA NCEI |
| Costliest hail storm | $625 million insured losses (1990 dollars), July 11, 1990 Source: Rocky Mountain Insurance Information Association |
| $756,300 | The median value of owner-occupied homes in Boulder County was $756,300 in 2020-2024. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 |
A storm counts when the library lists Boulder County among the areas it hit. Each hail size is the storm's largest report, which may have fallen in a neighboring county, and insured losses cover every area the storm hit.
Hail history by ZIP (NOAA reports since 1996; linked ZIPs have a full page, method)
| ZIP | Area | 1 in.+ reports | Largest |
|---|---|---|---|
| 80027 | Louisville | 15 | 3 in. |
Roofers in Louisville need a current City of Louisville contractor license and must be listed on the permit application, and since January 21, 2026 Louisville’s fire hardening code requires a Class A roof covering on permits for new construction, additions and replacement of building materials. The good news is that the paperwork is quick: Louisville lists a re-roof as a same-day permit, reviewed the same day or the next business day, through the city’s online portal. The real decision is choosing a Class A roof that fits the house.
Class A roof options for a Louisville home
Class A is the highest fire rating under the ASTM E108 and UL 790 tests, for roofing expected to resist severe fire exposure and not to create flying embers.
- Asphalt shingles. Most standard fiberglass shingles are Class A. Impact-resistant lines add hail protection.
- Metal. Standing seam and stone-coated steel; strong on fire and hail.
- Tile and slate. Noncombustible and long-lasting; check the framing for weight.
- Synthetic cedar. Many products are listed Class A, often as part of a specific assembly. Confirm the listing before you choose one.
Real wood shakes do not meet Class A on their own; our article on the fire hazards of cedar shake roofs explains why.
Permits and licensing in Louisville
- License. Any contractor or subcontractor on the job needs a current Louisville contractor license and must be listed on the permit.
- Online only. Permit applications go through the city’s online portal.
- 2024 codes. Louisville’s current residential and commercial code checklists are for the 2024 codes.
- Account first. You or your contractor need an account in the city’s portal before applying.
Hail, wind and insurance
If a storm damaged your roof, the fire hardening rules can shape what a replacement must include. The claim stays yours; our photos document the damage and make sure nothing gets missed in the scope. Louisville saw 3-inch hail on June 18, 2018; see hail damage roof repair in Denver and Denver storm damage repair.
Nearby
We also work in Broomfield to the east and Golden to the southwest. See all Denver-area towns we serve.
We are veteran-owned, family-run since 1990, an Owens Corning Platinum Preferred contractor, with 650+ Google reviews, and we reply the same business day. Call our Centennial office at (303) 209-0152 or book a free roof inspection.
Sources: City of Louisville, Fire Hardening Code; City of Louisville, Get a Building Permit; City of Louisville, Marshall Fire Rebuilding.
