Centennial enforces the 2021 IRC, and you need a permit once roof repairs total more than 100 square feet. Repairs over 25% of the roof force a full tear-off, an ice barrier is required on every roof, and every reroof gets a mid-roof inspection.
General information, read from the official sources listed below on 2026-10-28. Codes and local policies change, so confirm the rules for your address with the building department before work starts.
Centennial roof code data table
| Item | Centennial |
|---|---|
| Adopted IRC edition | 2021 IRC; existing roofs follow Chapter 9, Section R908. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Adopted IBC edition | 2021 IBC (Building FAQ, which also lists the 2018 IECC). Source: Centennial Building FAQ |
| Adoption or effective date | Not fully verified: Adoption date not stated in the sources read. |
| Roofing amendments and local policies | Repairs over 25% of the total roof area require a complete tear-off and reroof. Drip edge on all roof edges. Skip decking allowed only with gaps of 1/2 in or less. No used or harvested materials; products must arrive in manufacturer-marked packaging with a testing agency label. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Ice barrier rule | Required on all roofs. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Ground snow load | 30 psf non-reducible roof snow load (Sec. 18-2-30). A ground snow value is not stated in the sources read. Source: Centennial Building FAQ |
| Design wind speed | 115 mph (Sec. 18-2-30). Source: Centennial Building FAQ |
| Reroof permit trigger | Repairs totaling more than 100 sq ft on a roof or across combined slopes. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Layers allowed | Replacement follows IRC R908, which removes existing layers to the deck; repairs over 25% trigger that full tear-off. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Wildfire / WUI code status | Not fully verified: Not stated in the sources read for this page. Ask the building department. |
| Inspection requirements | Mid-roof on every reroof permit: tear-off and underlayment done, 25 to 75% of new material installed. Mid-roof and final may be done by photo under the Photo Submission Waiver. In person, the permit holder sets an OSHA ladder. Source: Centennial Residential Roof Repairs and Re-Roofing |
| Permitting office | City of Centennial Building Division. Source: Centennial Residential Roof Repairs and Re-Roofing |
What it means for a homeowner reroofing in Centennial
Centennial draws two lines. Over 100 square feet of repair needs a permit; over 25% of the roof means the whole roof comes off. On a 30-square roof, that second line falls at 7.5 squares, so a large repair can turn into a full replacement under city rules.
Every reroof gets a mid-roof inspection, timed after tear-off and underlayment but before the new roofing passes 75%. If a crew skips it, the city offers three ways out: photos with the waiver form, removing 10% of the shingles for an in-person look, or a stamped engineer letter.
Centennial bans harvested or reused roofing. Every bundle must be new and labeled, which matters if anyone suggests matching an old color with salvaged shingles.
Common inspection failures in Centennial
These are items the building department's own code or handouts say it checks or rejects. No public data ranks how often each one fails, so the order means nothing.
- Mid-roof inspection missed before the roof passed 75%.
- Salvaged or harvested shingles used for a color match.
- Skip decking gaps over 1/2 in left in place.
- Drip edge on eaves but not on rakes.
- Ice barrier left out.
Steps to permit a reroof in Centennial
- Total the repair area across all slopes; over 100 sq ft needs a permit, over 25% of the roof means a full tear-off.
- Order new, labeled materials only.
- Schedule the mid-roof at 25 to 75% installed, or file photos under the waiver.
- Close out with the final inspection.
Related pages
- Centennial roofing
- Colorado Wildfire Resiliency Code on a reroof
- Roof replacement
- Roof repair
- Hail damage repair
- Free roof inspection
- Compare roof codes by jurisdiction
Hail history by ZIP in Centennial: 80015 (Centennial)
Sources
Compiled by Integrity Roofing and Painting, roofing Colorado homes since 1990 (36 years in business). We are an Owens Corning Platinum Preferred contractor with 650+ Google reviews, and our repair scopes follow the local code and the manufacturer's installation and warranty requirements. We do not issue permits or rule on code; the building department does.
