First, describe the work and worksite
A roofing crew will install a specified fully adhered EPDM membrane on a released low-slope roof using the system’s adhesive and seam products. This fictional learning example records planned controls; it supplies no actual inspections or work authorization.
- Substrate support, moisture condition, material loading and installation documents are released.
- The actual adhesive and primer hazards determine ventilation, ignition control and exposure protection.
- This excludes TPO/PVC heat welding, torch roofing and roof insulation installation.
Questions before work
- What confirms substrate readiness and permitted material loading?
- Which adhesive and primer hazards affect roof and building occupants?
- How will large membrane sheets be controlled in the actual wind conditions?
Build the analysis one step at a time
What will the worker do? How could someone be harmed? What prevents or reduces that exposure? Who checks the control, and when?
1. Accept the roof and system
Hazard: An unsuitable substrate or overloaded roof can cause installation failure or collapse.
Control: Supervisor confirms support, substrate release and the specified membrane, adhesive and seam system. Hold wet, damaged or unapproved substrate conditions.
Verification: Compare actual materials and roof conditions with the installation documents.
Why this belongs in the analysis: A membrane label does not establish substrate readiness.
2. Establish protected access and material zones
Hazard: Workers can fall or trip while moving rolls and sheets.
Control: Maintain the planned fall, opening and access protection and stage loads only at released locations. Keep exits and drainage clear.
Verification: Lead checks access and material zones before delivery to the work area.
Why this belongs in the analysis: Roof loads and pedestrian routes must remain controlled together.
3. Prepare chemical application
Hazard: Adhesive or primer can expose workers to vapor, skin contact or ignition.
Control: Review each product label and SDS and use the specified ventilation, ignition and protective measures. Address intakes and building occupancy; open only the needed containers.
Verification: Lead confirms product controls and exposure response before use.
Why this belongs in the analysis: Water-based and solvent-based products may require different measures.
4. Unroll and position membrane
Hazard: Large sheets can catch wind, pull workers or obstruct a protected route.
Control: Use a coordinated handling method, limit exposed sheet area to what can be controlled and secure material by the system method. Stop when wind defeats control.
Verification: Leader checks sheet movement and crew positions continuously.
Why this belongs in the analysis: The membrane’s surface area changes the handling exposure.
5. Apply adhesive and complete seams
Hazard: Wet adhesive, cutting tools and kneeling work can cause contact injury, slips or strain.
Control: Follow product application and flash-off instructions with protected working positions, safe cutting and workable pacing. Maintain fall protection and keep others out of the wet application area.
Verification: Lead checks product method, footing and seam readiness against system instructions.
Why this belongs in the analysis: The JHA provides no universal flash-off time.
6. Secure products and release access
Hazard: Residual product, uncured seams or loose sheets can expose the next shift.
Control: Close and secure chemicals, collect compatible waste and identify cure, access and weather restrictions. Maintain protection until the roof is handed over by the designated authority.
Verification: Supervisor checks containers, sheet security and actual completion status.
Why this belongs in the analysis: A finished-looking membrane may still have product restrictions.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Be careful around the equipment. | Review each product label and SDS and use the specified ventilation, ignition and protective measures. Address intakes and building occupancy; open only the needed containers. |
| Check the area before starting. | Supervisor confirms support, substrate release and the specified membrane, adhesive and seam system. Hold wet, damaged or unapproved substrate conditions. |
Decisions that change the analysis
What membrane systems does this example cover?
It covers the specified fully adhered EPDM system. TPO/PVC heat welding, mechanically attached membranes and other methods introduce different equipment and operating conditions and require their own analysis.
What must be recorded before this example is used on a job?
Replace the scenario with the actual work, identify additional hazards with the crew, and record the applicable instructions, responsible people, inspection findings, unresolved actions and required authorization. A planned verification is not an inspection result.
Agree when the crew will pause
- System products, substrate or adhesive method changes.
- Wind, vapor control, occupancy or footing changes.
- Roof loading or fall/opening protection is uncertain.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting. Keep unresolved actions visible.
Download the worked example and free template
No account or paid membership required. The worked example contains planned controls. The blank template is for your own work; neither includes fabricated inspection results, signatures or approval.
Your editable working copy
Build and download your draft
Start blank or load the learning example. Replace its assumptions with your actual conditions and involve the people doing the work. Your entries stay in this browser tab; download a copy before leaving or refreshing.
1. Describe your work and site
2. Work through each task
Describe an observable step, how someone could be harmed, and the control that acts on that hazard. Identify who checks it and what evidence is needed.
3. Record changes, checks, and open actions
Walk the work area, review with the crew, and resolve missing controls. Follow the required approval process. This tool does not judge completeness, verify signatures or authorize work.
Open the downloaded file in a browser, then use Print → Save as PDF for a printable copy.
Training needs to confirm
- Actual membrane, adhesive and seam-system instruction.
- Chemical hazards, large-sheet handling and roof fall protection.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support crew discussion; they do not establish competence.
Common questions
Can this be used as a JSA?
Use the Task | Hazard | Control structure if it meets the employer’s format. Adapt the boundaries, controls, verification and records to the actual job.
Does this provide a completed USACE AHA?
No. Use the project’s required AHA process, risk method, supporting fields and acceptance requirements. The existing formwork AHA explains the additional structure.
Are these resources part of a paid course?
This walkthrough, browser draft builder and downloads are free public resources, separate from Academy course enrollment.
References and source note
- OSHA Protecting Roofing Workers
- OSHA 1910.1200 Hazard communication
- OSHA 1926.59 Hazard communication in construction
- OSHA 1926.501 Duty to have fall protection
- OSHA 1926.503 Fall protection training
Original worked example developed for the stated scenario. Primary references support the planning framework; the actual equipment manual, product instructions and project design must supply applicable operating and acceptance criteria. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.