Direct Answer
Yes, you can take temporary steps to control a commercial roof leak yourself, but you should generally avoid attempting repairs directly on the roof unless you have the appropriate training, equipment, and fall protection. The safest immediate response is to protect the building’s interior, contain the water, document the damage, and contact a qualified commercial roofing contractor.
Temporary measures such as buckets, plastic sheeting, and interior water diversion can limit damage while you wait for professional assistance. Emergency tarping or temporary roof patching may also help in appropriate circumstances, but exterior work should be performed by qualified personnel when access and weather conditions permit.
The Occupational Safety and Health Administration’s fall-protection requirements address the hazards associated with roofing work. For employees performing roofing work on low-slope roofs, OSHA generally requires appropriate fall protection when unprotected edges are 6 feet or more above a lower level, subject to the applicable requirements and permitted alternatives.
A temporary fix is intended to limit immediate damage, not replace a professional diagnosis and permanent repair.
Who This Applies To
- Commercial property owners
- Property and facility managers
- Commercial real estate investors
- Retail center and warehouse managers
- Condominium and commercial building associations
- Business owners dealing with an active roof leak
- Maintenance teams responsible for commercial properties
Not for: This guidance is not a substitute for professional roofing services, electrical safety procedures, or emergency assistance when a building’s structure or occupants may be in danger.
1. Make the Interior Safe First
Before attempting to locate the roof defect, protect people and the affected building areas.
- Keep employees, tenants, and visitors away from the leaking area.
- Move inventory, furniture, documents, and equipment away from the water.
- Place warning signs or barriers around wet floors.
- Use buckets or sturdy containers to collect dripping water.
- Cover nearby items with plastic sheeting when appropriate.
- Notify building management or the designated maintenance team.
If water is near electrical fixtures, outlets, exposed wiring, or electrical equipment, keep people away and contact a qualified electrician or emergency responder as appropriate. Do not touch wet electrical equipment or enter a flooded electrical area.
If a ceiling is visibly sagging, bulging, or showing signs of possible collapse, clear the area immediately. Do not stand underneath it or attempt to investigate the space above it yourself.
2. Contain the Water Without Going onto the Roof
You may be able to reduce interior damage without touching the roofing system.
Depending on the situation, you can:
- Position a bucket or waterproof container beneath the drip.
- Use plastic sheeting to protect floors and nearby equipment.
- Use absorbent materials to control small amounts of water on safe walking surfaces.
- Arrange a safe temporary water-diversion method if water can be redirected without contacting electrical systems or creating another hazard.
- Check collection containers regularly so they do not overflow.
Remember that the location where water appears inside may not be directly beneath the roof defect. Water can travel along insulation, roof decking, structural members, and other components before reaching the ceiling.
These measures contain water; they do not repair the source of the leak.
3. Document the Leak Before Cleaning Up
Take photographs and videos when it is safe to do so. Documentation helps the roofing contractor understand the problem and can support an insurance claim if the damage is covered.
Record:
- The date and approximate time the leak was discovered
- The location of the interior leak
- Visible ceiling or wall damage
- Water accumulation and affected contents
- Recent weather conditions, if relevant
- Any previous leaks in the same area
- Temporary measures taken to control the water
Keep receipts for emergency supplies and retain any contractor reports or invoices. If the leak followed a storm, preserve relevant storm-damage evidence and notify your insurance representative when appropriate.
4. Should You Climb onto the Roof to Patch the Leak?
Generally, no—not if you are an untrained property owner or maintenance employee without appropriate roof access and fall protection.
Commercial roofs can present hazards that are difficult to recognize from the ground, including:
- Wet or slippery membranes
- Unprotected roof edges
- Fragile skylights and roof openings
- Hidden areas of weakened decking
- Electrical equipment and rooftop mechanical systems
- Loose roofing materials
- Wind and lightning exposure
OSHA explains that roof repair workers face fall hazards and that roof integrity and suitable protective measures must be considered before repair work begins.
Read the official OSHA roof-repair fall-protection fact sheet for additional safety guidance.
Never climb onto a roof during a storm, in strong winds, or while the surface is wet and slippery to attempt an emergency repair. A qualified roofing contractor can determine whether temporary exterior protection is appropriate.
5. Can You Use a Tarp as a Temporary Fix?
A properly installed waterproof covering may help reduce water entry when a roof has sustained damage, but its effectiveness depends on the roof system, the location of the opening, weather conditions, and how the covering is secured.
For a commercial building, the safer approach is to arrange professional emergency tarping when exterior protection is necessary.
Do not:
- Climb onto a wet roof to install a tarp.
- Attempt to secure a tarp in high winds.
- Attach a tarp by drilling or fastening through the membrane without an appropriate repair plan.
- Assume a loose tarp will remain secure during another storm.
- Block roof drains or create new areas where water can accumulate.
Temporary coverings must not introduce additional hazards or damage the existing roof system.
6. Should You Apply Roofing Cement, Caulk, or Sealant?
Not without identifying the roof system and understanding the repair requirements.
Commercial roofs may use TPO, PVC, EPDM, modified bitumen, built-up roofing, metal panels, or coated systems. Each system may require different materials and repair methods.
An unsuitable sealant or patch can:
- Fail to bond to the existing roof material
- Provide only short-lived protection
- Conceal the actual source of the leak
- Complicate subsequent professional repairs
- Potentially affect warranty coverage
For these reasons, avoid applying random household caulk, adhesive, or roofing products to an unidentified commercial roof system.
If a manufacturer warranty applies, review its requirements and consult the original installer or an authorized roofing professional before making a permanent repair.
7. Identify the Likely Cause Without Taking Unnecessary Risks
You can document visible clues from a safe location without attempting to diagnose or repair the roof yourself.
Common causes of commercial roof leaks include:
- Open or damaged membrane seams
- Punctures or tears
- Deteriorated flashing
- Failed seals around rooftop equipment
- Blocked drains or drainage problems
- Storm-related damage
- Loose or deteriorated metal roof components
- Previous repairs that have failed
Share any observations with the roofing contractor. Do not assume the visible interior drip identifies the exact location of the roof defect.
8. When Should You Call a Commercial Roofing Contractor?
Contact a qualified commercial roofing contractor promptly when:
- Water continues entering the building.
- The leak is spreading or affecting multiple rooms.
- The roof has visible damage following a storm.
- Water is affecting machinery, electrical systems, inventory, or critical operations.
- You suspect damaged seams, flashing, or membrane materials.
- The roof has a manufacturer warranty that may be affected by unauthorized repairs.
- The source of the leak cannot be identified safely.
- Temporary measures have not controlled the water.
For a serious or rapidly worsening leak, ask about emergency service and temporary weatherproofing. Do not wait for a routine inspection if water is actively threatening people, equipment, or building operations.
You can also review The First Hour: An Emergency Response Plan for a Leaking Commercial Roof for additional guidance on immediate response and containment.
9. What Should You Do After the Immediate Leak Is Controlled?
Once the immediate situation is safe, arrange for a professional inspection to determine the actual cause and scope of the damage.
Ask the contractor to document:
- The suspected source of water entry
- The affected roof areas
- The condition of the membrane, seams, and flashing
- Any drainage deficiencies
- Possible concealed moisture damage
- The recommended permanent repair
- Whether further investigation is necessary
- Any warranty or maintenance considerations
Request a written scope of work and retain photographs, invoices, inspection reports, and repair documentation. If insurance may be involved, contact the insurer or broker and follow the policy’s reporting and documentation requirements.
10. Temporary Repair vs. Permanent Repair
| Action | Purpose | Limitation |
|---|---|---|
| Bucket or interior water containment | Limits interior water damage | Does not stop the roof leak |
| Plastic sheeting over contents | Protects equipment and inventory | Does not repair the roof |
| Professional emergency tarping | Provides temporary exterior protection when appropriate | Requires follow-up inspection and permanent repair |
| Temporary professional patch | May reduce water entry while a permanent repair is arranged | May not address concealed damage or the underlying cause |
| Permanent roof repair | Corrects the identified roof defect | Requires an appropriate diagnosis and repair method |
11. How Can You Prevent Future Emergency Leaks?
A preventive maintenance program can help identify roof deficiencies before they develop into major leaks.
Commercial property owners should consider:
- Scheduling regular professional roof inspections
- Keeping drains and scuppers clear
- Documenting recurring leaks
- Monitoring flashing and membrane conditions
- Recording rooftop equipment work
- Inspecting after significant storms
- Maintaining roof warranty and repair records
- Establishing an emergency response procedure
For additional guidance, read How Often Should Commercial Roofs Be Inspected in Florida?
Bottom Line
Yes, you can temporarily manage a commercial roof leak yourself by protecting the interior, containing water, and documenting the damage. However, climbing onto the roof, applying incompatible sealants, or attempting an unfamiliar repair can create additional safety, roofing, and warranty problems.
Prioritize safety, arrange professional emergency protection when needed, and have a qualified commercial roofing contractor identify and permanently repair the underlying defect.
Related Questions
- What should you do during the first hour of a commercial roof leak?
- How quickly should you respond to a commercial roof leak?
- How do you find the source of a commercial roof leak?
Sources
- OSHA — Construction Fall Protection Requirements
- OSHA — Reducing Falls During Roof Repair
- ShieldLine Roofing — Emergency Response for a Leaking Commercial Roof
- ShieldLine Roofing — Can I Temporarily Fix a Commercial Roof Leak Myself?
Last reviewed: October 2026
Related Resources
How Is a Commercial Roof Leak Investigated to Find the Root Cause?
Need Commercial Roofing Help?
If your commercial building has an active leak, ShieldLine Roofing can help investigate the source, recommend appropriate temporary protection, and determine the permanent repair needed to protect the building.
Disclaimer: This information is provided for general educational purposes and does not constitute a site-specific roof diagnosis, engineering opinion, insurance determination, or code-compliance advice.
Commercial Roof Leak Detection & Repair
