If you smell gas nowLeave the building without using switches, flames, or phones indoors. From outside, call 911 if there is immediate danger and call your gas utility. Contact a private-side contractor only after the area is declared safe.
The short answer
Diagnosis should distinguish equipment controls from exposed gas piping, valves, regulators, and connections. Roof work may require coordination with the roofer so supports and penetrations do not compromise the roof system.
What matters in this situation
Commercial and multi-unit gas work adds operational consequences: multiple occupants, shared piping, equipment schedules, inspection coordination, and the need to document what can safely remain in service.
Details that help define the next step
- Affected unit and symptoms
- Roof access and fall-protection rules
- Visible corrosion or support damage
- Weather and business shutdown constraints
These details help establish scope; they do not replace an emergency response, onsite inspection, utility decision, permit requirement, or manufacturer instruction.
How a careful service process is organized
- Start by documenting affected unit and symptoms and roof access and fall-protection rules.
- Confirm visible corrosion or support damage and weather and business shutdown constraints before the scope is finalized.
- Have unit model and roof plan and facility contact ready for the onsite team or authority.
- Use the findings to define the appropriate commercial gas line repair scope, required testing, and any next authority or trade.
What to have ready when requesting service
- Unit model and roof plan
- Facility contact
- Roofer/warranty requirements
- Prior service findings
What not to do
Do not walk a restricted roof or disturb roofing around piping without authorization. Keep relevant tags, notices, equipment information, and safely obtained photos available for the people handling this specific situation.