Weld County Roofing Codes: Permits, Inspections, and Requirements
Adopted building and energy codes, permit rules, and roofing requirements for Weld County, Weld County. Rows below reflect our reading of the jurisdiction's own published sources, linked at the bottom of the page.
Weld County roofing code requirements
- What this jurisdiction requires
- 2018 IBC and 2018 IRC
- What this jurisdiction requires
- 2018 IECC
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- 115 mph three second gust, Exposure C
- What this jurisdiction requires
- No
- What this jurisdiction requires
- Commonly required at 50% complete
- What this jurisdiction requires
- Per Code
- What this jurisdiction requires
- Per Code
- What this jurisdiction requires
- Per Code
- What this jurisdiction requires
- Per Code
- What this jurisdiction requires
- Both
- What this jurisdiction requires
- Either
- What this jurisdiction requires
- Either
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Yes
| Requirement | What this jurisdiction requires |
|---|---|
| Current building code | 2018 IBC and 2018 IRC |
| Current energy code | 2018 IECC |
| Building permit required | Yes |
| Minimum wind speed rating for asphalt shingles | 115 mph three second gust, Exposure C |
| Inspectors carry ladders for the final | No |
| Requires midroof (in progress) inspection | Commonly required at 50% complete |
| Maximum layers of asphalt shingles permitted | Per Code |
| Sheeting gap requirement | Per Code |
| Minimum drip edge size | Per Code |
| Underlayment required 4:12 and above | Per Code |
| Type of valleys allowed | Both |
| Valley material required for closed valleys | Either |
| Valley material required for open valleys | Either |
| Kick-out required on step flashing | Yes |
| Requires ventilation to meet code | Yes |
Last checked September 2, 2026. This reflects published sources at that date, not an official ruling. Code adoptions change, so confirm with the Weld County building department before you pull a permit.
What Weld County requires, in plain language
Weld County builds to the 2018 IBC and 2018 IRC. That edition, not the newest code published nationally, is the rulebook an inspector in Weld County holds your roof to. Energy work on the same permit follows the 2018 IECC.
Layer limit in Weld County: Per Code. This is the line item that moves a bid the most. If your existing roof is already at the limit, the deck gets stripped before new material goes down, and the labor plus dump fees belong in the written price.
Wind is what Weld County tests shingles against. Shingles need a 115 mph three second gust, Exposure C rating.
How Weld County inspects the job. Midroof inspection: Commonly required at 50% complete. Inspectors carrying ladders for the final: No. Permit: Yes.
Since January 1, 2022 unincorporated Weld County has enforced the 2018 International Building, Existing Building, Residential and Mechanical Codes. The county design criteria sheet sets a 115 mph three second gust wind speed at Exposure C countywide, which drives shingle wind rating selection.
Installation details above come from our building department field survey for Weld County, last updated 1/6/19. Code editions and contacts are refreshed from the department directly. Always confirm the details on your permit before work starts, since departments amend requirements on their own schedule.
Sources
- https://www.weld.gov/Government/Departments/Planning-and-Development-Services/Building
- https://www.weld.gov/Government/Departments/Planning-and-Development-Services/Building/Building-Codes-Design-Criteria-and-Fees
These links go straight to the jurisdiction, so you always have the real-time source. Adoptions and amendments change on their schedule, not ours. Always confirm before permitting.
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Nearby jurisdictions
Last checked September 2, 2026. This is our best read of published sources, not an official ruling. Confirm with the Weld County building department before you pull a permit.