A commercial pre-storm inspection should cover the roof and drainage, exterior openings, occupied interiors, loading areas, outdoor storage and the people responsible for response. Start with safe observations and records, then assign qualified contractors to investigate or repair defects. The goal is a prioritized work list and a usable response plan before heavy rain or wind disrupts operations.
Use these 15 topics for a Southern California office, warehouse, retail property, dealership or commercial campus. They are planning prompts, not instructions to access roofs, open electrical equipment or enter underground drainage structures. Adapt the checklist to the actual property and its operating procedures.
Building and drainage: inspection topics 1–6
1. Previous leaks and unresolved work orders
Review tenant reports, stain photographs, repair records and outstanding recommendations. Identify recurring issues, including leaks that appear only after sustained or wind-driven rain. Confirm whether previous work was temporary or permanent. Record the room and approximate location; do not assume the water's entry point is directly above the visible damage.
2. Roof condition and access arrangements
Arrange professional review of the roof where appropriate and provide available system and warranty records. Establish safe access, escorts and tenant restrictions. Keep untrained staff off roofs and away from skylights or openings. The commercial roof rainy-season checklist explains what to include in the contractor's scope.
3. Roof drains, scuppers and downspouts
Gather reports of overflow, persistent standing water or damaged downspouts. Have qualified personnel assess drainage openings and the connected route. Clearing a visible opening does not prove that a concealed leader is clear. Keep primary and overflow drainage functions intact; do not plug an opening or remove a strainer as an improvised fix.
4. Windows, storefronts and exterior doors
From accessible areas, document water staining, damaged weatherstripping or reported leaks around openings. Include tenant entrances and service doors. A qualified contractor can determine whether sealant, flashing, drainage details or another component needs attention. Avoid blanket resealing that could obstruct designed weep or drainage paths.
5. Walls, parapets and penetrations
Record visible deterioration and any history of water entering near wall penetrations or transitions. Include exterior conduits and recently added equipment connections. Elevated inspection and testing may require specialist access. Do not infer the repair method from a ground-level photograph alone; a wall or transition defect can resemble a roof leak indoors.
6. Interior evidence and vulnerable rooms
Check normal accessible spaces for existing stains or tenant-reported moisture. Identify sensitive equipment, records or inventory below known problem locations. Do not enter a ceiling void or remain under a sagging ceiling to investigate. Plan how the affected area would be isolated and who would assess it if water appears.
Site and outdoor operations: inspection topics 7–12
7. Parking-lot inlets and private drainage
Observe accessible inlet surfaces and known trouble spots without removing covers or entering a structure. Record debris, damaged grates and earlier flooding. Confirm maintenance responsibility for private versus public systems. San Diego County's drainage maintenance guidance explains why unobstructed conveyance matters.
8. Loading docks and low areas
Review where rainwater has previously collected near docks, ramps and below-grade areas. Consider the consequence for deliveries, tenant access and stored goods. Have drainage or pumping equipment assessed by the appropriate provider where present. Do not assume a portable pump is suitable or that its discharge can go into any available drain.
9. Runoff paths and neighboring property
Identify observed routes of water across paved and landscaped areas. Note erosion, recurring sediment deposits and obstructions. Drainage corrections may require design or jurisdictional review. Avoid improvised berms, discharge changes or barriers that redirect water toward a neighbor, block an exit or interfere with public drainage.
10. Outdoor materials and waste storage
Check whether supplies and waste containers are secured, covered and away from vulnerable drainage paths. Review outdoor chemical or liquid storage with the responsible staff. San Diego County's business preparedness guidance calls for attention to stored materials, containment, spill supplies and stormwater controls before rain.
11. Gates, fences, signs and loose items
Record visible damage or movement that merits professional assessment before wind arrives. Include tenant-owned items where responsibility is unclear. Have authorized personnel secure movable items when safe and practical. Do not climb, brace a damaged structure or approach unstable signage; isolate the area and request qualified help.
12. Exterior equipment and utility concerns
Document visible concerns from a safe distance and arrange review by the appropriate trade. Include equipment that has previously leaked or lost function during rain. Do not open electrical enclosures or touch equipment in wet conditions. OSHA's flood response guidance identifies electrical hazards among the significant risks after water intrusion.
Response planning: inspection topics 13–15
13. Tenant communication and safe access
Confirm how tenants report problems and receive operating instructions. Identify a contact for each occupied space and any access or escort restrictions. Keep entrances and designated exit paths in mind when planning containment or work areas. Emergency operating decisions should follow the property's established procedures and directions from authorities.
14. Contractor contacts and authorization
Verify current telephone numbers, the information each provider needs and who can authorize work. Confirm availability before relying on after-hours support. Keep instructions for urgent safety escalation separate from ordinary maintenance requests. A vendor list is useful only if contacts, coverage and approval responsibilities are current.
15. Incident records and follow-up
Prepare a simple location-based log for photographs, time of onset, observed symptoms and actions taken. Store it where authorized staff can reach it. Separate temporary containment, diagnostic work, permanent repairs and interior restoration so each can be tracked to completion. Document an unresolved condition instead of closing it because rain stopped.
How to turn the checklist into useful work
Assign each issue an owner and a next action. Immediate safety concerns require appropriate escalation, not a place at the bottom of a maintenance list. Active leaks and repeatedly blocked drainage deserve prompt assessment. Routine housekeeping and planned repairs can then be sequenced around access, approvals and weather.
| Field | What to capture |
|---|---|
| Location | Building, area and a photograph reference. |
| Observation | What was seen or reported, without guessing the cause. |
| Next action | Assessment, maintenance, repair proposal or authority notification. |
| Responsible person | Who arranges access, approves work and receives the findings. |
| Status | Open, scheduled, temporarily addressed, or completed with documentation. |
Review the list again after the work and after significant weather when conditions are safe. A dry day can conceal a symptom without resolving its cause. Compare new observations with the original reports and ask whether further investigation is appropriate.
Common questions
Can onsite staff perform the whole inspection?
Staff can collect records and make safe observations within their training and authorization. Roof work, electrical work, elevated access and entry into drains or pits need appropriate qualifications and controls. OSHA identifies storm drains among possible confined-space locations.
Is this a regulatory compliance inspection?
No. It is a practical property-maintenance planning checklist. Permit requirements, stormwater programs, life-safety systems and specialist inspections may require separate reviews based on the site and work.
Should every building on a portfolio use the same priorities?
Use a consistent record format but tailor priorities. Roof condition, prior leaks, inventory exposure, tenant operations, access and site drainage vary. A common template should make those differences visible.
Coordinate preparation across the property
Brady Construction Group can discuss commercial storm preparation, facility inspections and appropriate repair support for Southern California sites. Start with the location and known concerns. Request facility service or call 909-293-9861. See the commercial storm-services overview for preparation, response and follow-up options.