Key numbers
62 verified hail storms with stones of 1.75 inches or larger reached Douglas County, which includes Castle Rock, from 1991 to 2026 in the storm records we keep; the largest measured 4.25 inches (grapefruit size) on June 10, 2010 (NOAA NCEI).
| Hail storms by decade, 1991 to 2026 | 1990s: 1, 2000s: 26, 2010s: 25, 2020s: 10 Source: Storm library: Denver metro hail history |
|---|---|
| Largest hail | 4.25 in. (grapefruit), June 10, 2010 Source: NOAA NCEI |
| Costliest hail storm | $767.6 million insured losses (2009 dollars), July 20, 2009 Source: RMIIA |
| 78.8% | 78.8% of occupied housing units in Castle Rock were owner-occupied in 2020-2024. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 |
| About 7.2% | About 7.2% of Douglas County's housing units (10,347 of 144,432) were built in 1979 or earlier, the Census bin closest to the 1978 federal lead-paint ban. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 |
A storm counts when the library lists Douglas 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 |
|---|---|---|---|
| 80104 | Castle Rock | 30 | 1.75 in. |
| 80109 | Castle Rock | 9 | 2.5 in. |
Local building code: Castle Rock roof code data: IRC edition, reroof permits, ice barrier
Roofers in Castle Rock must pull a Town of Castle Rock building permit before replacing a roof, tear off 100% of the existing roofing (including the underlayment) down to the deck, pass a mid-roof inspection before the roof is closed up, and keep the job moving, because the permit expires if no inspection happens within 180 days. Since June 30, 2026, the Colorado Wildfire Resiliency Code may also apply, depending on your property’s wildfire hazard classification. Overlays are not allowed anywhere in town.
The Town’s re-roof checklist, in plain terms
- Permit first. A building permit is required before any roof replacement.
- Full tear-off. Remove the existing covering and underlayment to expose the deck. No overlays.
- Mid-roof inspection. Inspectors check the work before it is covered. If it gets missed, the Town’s fixes are uncovering 10% of each facet (with a possible $85 re-inspection fee) or an engineer’s or architect’s letter.
- Ladder and access. The permit holder provides a ladder set to OSHA standards. If an inspector needs to enter an occupied home, an adult 18 or older must be there, and fenced backyards need an adult present or written permission posted.
- Keep it moving. A permit with no completed inspection for 180 days expires.
Wildfire code in Castle Rock
Starting June 30, 2026, the Colorado Wildfire Resiliency Code may apply to a Castle Rock re-roof, depending on the property’s hazard classification on the state map. Where it applies, roof coverings must be Class A, and replacing 25% or more of an existing roof covering means replacing the whole roof to the new-construction standard. That can turn a large hail repair into a full replacement, so it belongs in your insurance scope; the claim stays yours, and our photos make sure nothing gets missed. Read more in our Castle Rock roofing codes article.
Materials for Castle Rock homes
We install asphalt shingles (including Class 4 impact-resistant lines), metal, tile and synthetic cedar. If your HOA limits colors or materials, bring the guidelines to the inspection.
Served from our Denver-area office
Castle Rock is served from our Denver-area office in Centennial, a straight drive on I-25, and calls go to our Denver line. Nearby: Centennial, Littleton, and Franktown, which is unincorporated and permitted by Douglas County instead of the Town. For leaks and small damage, see roof repair. 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 (303) 209-0152 or book a free roof inspection.
Sources: Town of Castle Rock, Re-Roof Checklist; Colorado Division of Fire Prevention and Control, 2025 Colorado Wildfire Resiliency Code.
Photos From Our Projects
