Commercial Roofing Contractor provides commercial and residential roofing, roof replacement, repair, and hail damage work in Commerce City, Colorado from our Denver office. Commerce City wrote its own climatic design table rather than adopting the standard one, and amended the drip edge requirement with its own dimensions. Every inspection we do in Commerce City is free and no-obligation.
Roofing Across the Industrial North
Commerce City covers a wide stretch of Adams County at about 5,160 feet, from the older residential grid west of Highway 2 out across the industrial and logistics landscape toward DIA and the refinery corridor. The roofing profile is unusually weighted toward commercial and industrial low-slope work as a result: large-footprint warehouse and distribution roofs where a single membrane covers acres, ponding is the primary failure mode, and a leak is a business interruption rather than a household inconvenience. Sitting out on the open plain, the city has the same unobstructed storm exposure as Thornton to the north, and Adams County records a high volume of reported hail. The residential side is concentrated in the established neighbourhoods and the newer growth around Reunion and Buffalo Run, where uniform subdivision roofs age in waves.
Roofing Codes and Permits in Commerce City
Roofing work in Commerce City is permitted and inspected by the Commerce City Building Safety Division. Colorado has no statewide roofing code, so requirements are set jurisdiction by jurisdiction and genuinely differ between neighbouring towns. The details below are taken from Commerce City's own published requirements.
Worth knowing in Commerce City: Commerce City replaced the IRC climatic design table entirely with its own values, and amended the drip edge section to require corrosion-resistant metal of at least 0.019 inch at eaves and rakes, lapped two inches, extending a quarter inch below the sheathing and two inches back onto the deck.
- Commercial path
- 2021 International Building Code, adopted as the Commerce City Construction Code
- Residential path
- 2021 International Residential Code, adopted as the Commerce City Residential Code
- Ice barrier
- Required.
- Design wind speed
- 115 mph
- Design snow load
- Ground snow load 35 psf
- Frost depth
- 36 inches
This is a summary to help you plan, not a compliance determination. The Commerce City Building Safety Divisionis the authority on what your specific roof requires, and we always confirm current requirements with them before we scope a job. Several Front Range jurisdictions changed their adopted codes during 2026, so we re-verify against each department's own published codes rather than working from memory. Source: City of Commerce City adopted 2021 IRC and 2021 IBC pages, including its replaced Table R301.2. Last verified July 2026.
Wildfire code: what changes on a reroof
The 2025 Colorado Wildfire Resiliency Code applies inside mapped wildland-urban interface areas. The code applies inside mapped wildland-urban interface areas. Each jurisdiction declares and maps those areas itself and publishes the map, so whether a specific address falls inside one is checked against the local map. Where it applies, the rule that matters most on a reroof is the 25 percent threshold: where an existing roof is replaced, or 25 percent or more of the roof surface area is replaced, the entire roof covering must be brought up to the new-construction wildfire standard, unless the existing covering already complies.
The new-construction standard means roofs must have a covering or assembly classified Class A when tested to ASTM E108 or UL 790. Where the covering profile leaves a space above the deck, that space must resist flames and embers by noncombustible firestopping, an ASTM D3909 cap sheet over the combustible deck, or a listed Class A assembly. That last requirement catches tile and metal profiles, not just shingles, so it reaches commercial work as well as homes. We check the Commerce City map before quoting, because it changes the scope rather than just the material.
For the full picture on storm-driven replacement, see our storm damage and insurance claim guidance.
Roofing Services We Provide in Commerce City
- Commercial roofing services - TPO, EPDM, metal, modified bitumen and roof coatings for retail, office and light industrial buildings, including low-slope drainage corrections.
- Residential roofing - asphalt shingle including Class 4 impact-resistant products, metal, tile, and synthetic slate and shake.
- Storm and insurance claim support - free damage documentation and adjuster coordination for both commercial property claims and residential homeowner claims, which are scoped and settled differently.
- Roof repair and full replacement - year-round, not only after storms.
Nearby Front Range Communities We Serve
Frequently Asked Questions
Which codes does Commerce City use?
Commerce City adopts the 2021 International Building Code as the City of Commerce City Construction Code and the 2021 International Residential Code as the City of Commerce City Residential Code. Where its code conflicts with a county health, state or federal regulation, the more restrictive provision controls.
Does Commerce City require ice and water shield?
Yes. Commerce City deleted the standard IRC climatic design table in its entirety and substituted its own, and that table records ice barrier underlayment as required.
What are the drip edge requirements in Commerce City?
Commerce City amended the drip edge section with its own dimensions: corrosion resistant metal of at least 0.019 inch nominal at eaves and rake edges, with adjacent segments overlapped not less than 2 inches, extending not less than a quarter inch below the roof sheathing and back onto the roof deck not less than 2 inches.
What design loads does a Commerce City roof work to?
From the city's own substituted table: ground snow load 35 psf, design wind speed 115 mph, frost line depth 36 inches, seismic design category B, and severe weathering. The table also records the city elevation at 5,160 feet, which is relevant to how hail behaves on the way down.
Do you handle large industrial roofs in Commerce City?
Yes, and that is much of the work here. Large-footprint warehouse and distribution roofs are where drainage geometry, ponding and seam integrity decide the outcome rather than impact damage. We install and replace TPO, EPDM, modified bitumen and metal, and use fluid-applied coatings where restoring a serviceable roof beats replacing it.
I want to add solar. Does that affect the roof permit?
It can. Commerce City amended its residential code to set photovoltaic array setbacks: at least an 18 inch clear setback on both sides of a horizontal ridge where the array occupies no more than 66 percent of the plan view roof area, and at least 36 inches where it occupies more. Sequencing the roof and the array together avoids doing the work twice.
Should I reroof before winter or can it wait?
It depends on what the inspection finds rather than the calendar. Commerce City's design criteria record severe weathering and a 36 inch frost line, and a roof that is merely tired in September can become an active leak once freeze and thaw cycling starts working on open seams and tired flashings. We document condition with photos so the decision is based on evidence.
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