Northglenn Roofing Codes: Permits, Inspections, and Requirements
Adopted building and energy codes, permit rules, and roofing requirements for Northglenn, Adams County. Rows below reflect our reading of the jurisdiction's own published sources, linked at the bottom of the page.
Northglenn roofing code requirements
- What this jurisdiction requires
- 2021 IBC and 2021 IRC, with a 2024 update pending
- What this jurisdiction requires
- 2021 IECC
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Class A
- What this jurisdiction requires
- Class A
- What this jurisdiction requires
- Class A
- What this jurisdiction requires
- Wind Exposure Category "B"
- What this jurisdiction requires
- ASTM D 3161 F
- What this jurisdiction requires
- No
- What this jurisdiction requires
- Yes, per manufacturer requirements
- What this jurisdiction requires
- No
- What this jurisdiction requires
- Yes, all roofs except asphalt shingle roofs require mid-roof inspection
- What this jurisdiction requires
- No
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- ½ inch gap
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Rake metal, only if exposed sheathing
- What this jurisdiction requires
- No
- What this jurisdiction requires
- No
- What this jurisdiction requires
- #15
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Both
- What this jurisdiction requires
- Metal, or two plies of rolled
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Yes, new construction only
| Requirement | What this jurisdiction requires |
|---|---|
| Current building code | 2021 IBC and 2021 IRC, with a 2024 update pending |
| Current energy code | 2021 IECC |
| Building permit required | Yes |
| Roof system fire rating (residential) | Class A |
| Roof system fire rating (commercial) | Class A |
| Roof system fire rating (multi-family) | Class A |
| Minimum wind speed rating for asphalt shingles | Wind Exposure Category "B" |
| ASTM standard for wind rating | ASTM D 3161 F |
| Requires a manufacturer wind warranty | No |
| Requires wind nailing | Yes, per manufacturer requirements |
| Inspectors carry ladders for the final | No |
| Requires midroof (in progress) inspection | Yes, all roofs except asphalt shingle roofs require mid-roof inspection |
| Requires a sheathing / decking inspection | No |
| Requires solid sheeting over spaced decking | Yes |
| Sheeting gap requirement | ½ inch gap |
| Requires drip edge | Yes |
| Minimum drip edge size | Rake metal, only if exposed sheathing |
| Requires rake / gable metal edging | No |
| Self adhering underlayment (ice and water shield) | No |
| Underlayment required 4:12 and above | #15 |
| Rolled roofing allowed on low slope over living space | Yes |
| Type of valleys allowed | Both |
| Valley material required for open valleys | Metal, or two plies of rolled |
| Kick-out required on step flashing | Yes |
| Requires ridge cap | Yes |
| Requires soffit / eave vents | Yes, new construction only |
Last checked September 2, 2026. This reflects published sources at that date, not an official ruling. Code adoptions change, so confirm with the Northglenn building department before you pull a permit.
What Northglenn requires, in plain language
Northglenn builds to the 2021 IBC and 2021 IRC, with a 2024 update pending. That edition, not the newest code published nationally, is the rulebook an inspector in Adams County holds your roof to. Energy work on the same permit follows the 2021 IECC.
Wind is what Northglenn tests shingles against. Shingles need a Wind Exposure Category "B" rating. Rating is proven under ASTM D 3161 F. Wind nailing: Yes, per manufacturer requirements. Manufacturer wind warranty: No.
Underlayment and edge metal are where roofs fail inspection. Ice and water shield: No. On 4:12 and steeper: #15. Drip edge: Yes. Minimum drip edge size Rake metal, only if exposed sheathing.
How Northglenn inspects the job. Midroof inspection: Yes, all roofs except asphalt shingle roofs require mid-roof inspection. Sheathing or decking inspection: No. Inspectors carrying ladders for the final: No. Permit: Yes.
Northglenn adopted the 2021 International Building Code by reference through Municipal Code Chapter 10. A 2024 update ordinance has been under council consideration, so confirm the edition in force.
Installation details above come from our building department field survey for Northglenn, last updated 11/27/18. 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.northglenn.org/government/departments/building/index.php
- https://municode.northglenn.org/ch10/content_10-2.html
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.
Keep going
Nearby jurisdictions
Last checked September 2, 2026. This is our best read of published sources, not an official ruling. Confirm with the Northglenn building department before you pull a permit.