First, describe the work and worksite
A roofing test crew will use Buckleys Wet Roof Pro2 in wet-roof mode to locate membrane defects in one defined low-slope roof area. The accepted assembly has an insulating waterproof membrane and a suitable conductive path to the identified substrate connection. Controlled surface wetting supports voltage-gradient mapping. This fictional learning example describes planned controls and records no actual inspection or authorization.
- The testing lead verifies membrane, underlying assembly, accessible connection and conductive-path suitability before water is introduced. The actual test plan and Wet Roof Pro2 instructions govern setup and evidence; unsuitable or uncertain assemblies are held.
- Protected roof access, bearing, edge and opening controls, drainage and adjacent electrical conditions are accepted. Wetting cannot flood-load the roof, contaminate sensitive spaces or expose workers to an uncontrolled electrical source.
- Low-slope commercial roofing 238160-28 and inspection/preparation 238160-05 are partial connections. This cycle excludes moisture-impedance scanning, high-voltage testing, wet-sponge upstand testing, flood testing, roof intrusion and defect repair.
Questions before work
- Who accepts the actual membrane/conductive assembly and safe substrate connection before wetting begins?
- How will the test boundary, wet surface and leads remain inside the protected roof-access arrangement?
- What evidence distinguishes a located defect, an excluded area and a test whose circuit or coverage is inconclusive?
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 assembly and bounded test method
Hazard: An unsuitable membrane or interrupted conductive path can produce misleading results while unnecessary water exposes the building and workers.
Control: Testing lead identifies membrane, underlying layers and proposed connection under assembly information and instrument instructions. Resolve insulating or conductive layers, inaccessible interfaces and limitations before wetting. Agree test boundaries and reporting criteria. Hold uncertain suitability; not every membrane roof supports this method.
Verification: Testing lead verifies documented suitability, connection basis and reporting scope.
Why this belongs in the analysis: A usable electrical test path is a prerequisite, not a test conclusion.
2. Prepare protected access and controlled water introduction
Hazard: Slippery surfaces, hidden openings, wet leads or water entering adjacent systems can create fall, trip and electrical hazards during the survey.
Control: Maintain accepted bearing, roof route, edge and opening protection. Coordinate water supply and drainage without accumulation or drain interference. Responsible site personnel control unrelated energized equipment and affected occupancy. Plan communication and withdrawal before wetting; the survey remains within accepted protected positions.
Verification: Lead verifies safe survey positions, drainage and controlled electrical interfaces.
Why this belongs in the analysis: The wetting method changes access conditions before readings are taken.
3. Arrange the circuit and verify instrument readiness
Hazard: Wrong lead connections, unsuitable substrate access or an unscreened metal penetration can create false indications or send the crew into an unsafe location.
Control: Check the battery-powered kit and arrange prescribed perimeter and permitted substrate connection, screening conductive penetrations. Refer building-electrical uncertainties to authorized personnel. Confirm equipment and circuit suitability before wetting, then complete required operational verification after establishing the controlled water film. Keep connection work within accepted access.
Verification: Operator records readiness, intended circuit and the prescribed verification results.
Why this belongs in the analysis: Suitability comes first; an operating check then verifies the arranged circuit.
4. Survey systematically from protected positions
Hazard: Following a direction indication blindly can draw a tester outside protection or produce incomplete coverage and an unsupported acceptance claim.
Control: Use wet-roof mode and the planned systematic route with consistent probe arrangement and lead control. Interpret indications under the manufacturer’s method without invented thresholds. Stay within protected access; stop at restricted areas. Record interruptions and inaccessible coverage rather than extending the route informally.
Verification: Testing lead checks route coverage, usable indications and maintained access protection.
Why this belongs in the analysis: A location method needs both valid indications and known coverage.
5. Resolve and document defect indications
Hazard: A conductive fitting or already located defect can dominate the circuit, hide another fault or lead to unnecessary membrane damage.
Control: Refine locations and screen identified paths under the manual before continuing. Mark and photograph evidence without damaging the roof, tied to fixed features. Refer ambiguous indications or failed verification to the testing lead and quality authority. Do not open the membrane or begin an unplanned repair.
Verification: Testing lead verifies location evidence, screening and unresolved indication status.
Why this belongs in the analysis: Evidence must distinguish an actual location from a circuit interference.
6. Remove the test setup and hand over limited findings
Hazard: Loose trace wire, residual wet conditions or an overstated report can expose the next crew or conceal untested roofing behind a blanket approval.
Control: Shut down and remove leads and perimeter wire by the safe route. Restore water and drainage arrangements and retain wet-surface restrictions. Record boundaries, circuit checks, locations and limitations for quality and repair leads. A later retest follows a separately accepted repair and test plan.
Verification: Lead verifies setup removal, remaining access state and bounded test report.
Why this belongs in the analysis: The report must preserve what was tested and what remains uncertain.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| No strong signal means the whole roof passes. | Testing lead checks circuit verification and actual coverage and reports inaccessible, unsuitable and inconclusive areas explicitly. |
| Keep following the indicator past the roof boundary. | Operator stops inside protected access and obtains a revised test and protection arrangement before changing the survey route. |
Decisions that change the analysis
Does a wet surface make an unsuitable roof assembly testable?
No. Surface moisture cannot establish a missing conductive path beneath the insulating membrane or validate an unsafe connection. The testing lead must resolve the actual assembly and circuit basis before wetting. If that prerequisite cannot be demonstrated, hold this method and obtain a technically accepted alternative; do not manufacture a leak or puncture the roof to create a test path.
What must the crew record for actual use?
Record roof and assembly identification, instrument and manual, accepted conductive-path and connection basis, tested boundary and protected access. Record water and drainage arrangements, circuit verification, coverage, screening, defect locations and photographs, interruptions and unresolved indications. Name receiving quality and repair leads and report limitations; this example is neither a warranty acceptance nor evidence that the roof is watertight.
Agree when the crew will pause
- Membrane identity, conductive path, connection access or metal-interface arrangement does not support the accepted method.
- Operational verification fails, indications are ambiguous or access conditions prevent the planned systematic coverage.
- Water accumulates, drainage or unrelated electrical conditions change, or protected roof access and communication are lost.
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 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
- Instrument-specific instruction on Wet Roof Pro2 wet-roof mode, assembly suitability, trace-wire arrangement, prescribed circuit verification and systematic defect location.
- Task instruction on protected wet-roof access, water and lead control, electrical-interface limits and evidence-based reporting without declaring untested areas defect-free.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support toolbox talks; they do not establish competence.
Common questions
Can this example be used as a JSA?
Adapt the Task | Hazard | Control analysis to the employer’s JSA and actual work. Confirm assigned checks and record real findings before use.
What changes if the project requires an AHA?
Use the governing project format, risk method and acceptance process. The published formwork AHA illustrates additional structure; this example supplies no project risk rating or acceptance.
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
- Buckleys Wet Roof Pro2 Instruction Manual, 11/24, wet-roof mode
- OSHA 1926.501 Walking/working surface and fall-protection duties
- OSHA 1926.21 Safety training and education
Original instructional scenario with planned controls. Primary references support hazard planning. Use actual equipment and product instructions, project design and employer requirements to establish field criteria. This example supplies no inspection findings or work authorization. Use actual equipment instructions and site requirements alongside these references. Reference review: October 12, 2026.