Sheet Metal and Flashing Trim AHA (Activity Hazard Analysis / Job Hazard Analysis)
Updated 2026-06-23
A Sheet Metal and Flashing Trim AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps the crew installing sheet metal and flashing trim safe from the at-height roof-edge and fall, from the sharp metal-edge cut and laceration, and around the fabrication, fastening, and soldering. Sheet metal and flashing trim installs sheet-metal trim and flashing — combining the at-height-roof-edge and fall hazard, the sharp-metal-edge-cut and laceration hazard, and the fabrication-fastening and soldering hazard. This guide walks through building a Sheet Metal and Flashing Trim AHA that names the at-height-roof-edge/fall, sharp-metal-edge-cut/laceration, and fabrication-fastening/soldering hazards and assigns the fall, cut, and tool/soldering controls that hold up in the field.
Why sheet metal and flashing trim needs its own AHA
Sheet metal and flashing trim is the installation of sheet-metal trim and flashing — the sheet-metal trim, edge metal, fascia/drip edge, coping trim, and flashing trim installed at roof edges, fascia, and transitions to complete and weatherproof the roof edge and details. This closes the flashing/sheet-metal group. The defining feature is the same as flashing and sheet metal — trim work concentrated at the exposed roof edge and fascia (the fall line) with sharp cut metal edges — and it commonly involves soldering (soldering the seams/joints of metal trim and flashing, a hot-soldering burn hazard). The hazards combine the at-height-roof-edge and fall (working at the roof edge/fascia — the fall hazard), the sharp-metal-edge-cut and laceration (the sharp cut metal edges — the laceration hazard), the fabrication-fastening and soldering (fabricating, fastening, and soldering the trim — the tool, fastening, and soldering-burn hazards), and the eye. The at-height-roof-edge/fall and the sharp-metal-edge- cut/laceration justify a dedicated AHA.
Breaking sheet metal and flashing trim into steps
The steps for a Sheet Metal and Flashing Trim AHA follow the work:
- Assess the roof edge/fascia (fall exposure, access)
- Set up roof-edge/fascia fall protection
- Measure, cut, and form the trim (sharp edges, tools)
- Position and fasten the trim
- Solder the joints where required (hot soldering)
- Manage the fall, cut, and soldering hazards
- Complete
Each step carries a hazard, and the at-height-roof-edge/fall, the sharp-metal-edge-cut/laceration, and the fabrication-fastening/soldering are where the most significant risks concentrate.
The hazards step by step
At-height-roof-edge and fall
Working at the roof edge/fascia — the fall hazard. The controls are roof-edge fall protection (sheet-metal trim and flashing trim is installed at the roof edges, fascia, and transitions — the most exposed fall locations, right at the fall line — so fall protection at the roof edge (guardrails, personal fall arrest, warning-line systems as applicable) is especially critical, and safe access, recognizing the trim work puts the worker at the edge/fascia), and the fall controls. The at-height-roof-edge/fall is the primary defining hazard — trim work is at the roof edge, the most exposed fall location. (These follow the roof-fall fundamentals.)
Sharp-metal-edge-cut and laceration
The sharp cut metal edges — the laceration hazard. The controls are sharp-metal-edge and laceration controls (cut and formed sheet-metal trim has very sharp edges (freshly cut/sheared edges are like blades — a serious laceration hazard, and handling long trim pieces means the sharp edges can drag across hands/arms), so cut-resistant gloves and sleeves, careful handling, and deburring/hemming edges where practical), and the laceration controls. The sharp-metal-edge-cut/laceration is a defining hazard — cut metal trim edges cause serious lacerations. (These follow the sharp-edge fundamentals.)
Fabrication-fastening and soldering
Fabricating, fastening, and soldering the trim — the tool, fastening, and soldering-burn hazards. The controls are fabrication-fastening and soldering controls (fabricating the trim involves cutting (snips/shears/powered metal- cutting — the cut hazard) and bending/forming (brakes/forming tools — pinch), fastening (fastening tools), and soldering the joints/seams of metal trim and flashing (soldering irons/torches and molten solder — the hot- soldering burn hazard, the soldering-flux fumes, and, where a torch is used, the open-flame fire hazard — so burn protection, ventilation for flux fumes, and fire protection for torch soldering)), and the tool/soldering controls. The fabrication-fastening/soldering is a defining hazard — soldering trim is a burn and fume/fire hazard. (These follow the tool-safety and soldering fundamentals.)
Eye
The eye (metal cutting, soldering, flux) carries the eye hazard. The controls are eye protection (metal cutting chips/swarf, soldering splatter, and flux), and the eye controls. (These follow the eye-protection fundamentals.)
A simple Sheet Metal and Flashing Trim AHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Assess | Fall | Assess the roof edge/fascia (fall exposure, access) | project |
| Fall protection | Fall | Set up roof-edge/fascia fall protection | OSHA 1926.501 |
| Cut/form | Sharp edge / cut | Measure, cut, and form the trim (sharp edges, tools) | project |
| Fasten | Fastening | Position and fasten the trim | OSHA 1926.302 |
| Solder | Burn / fire | Solder the joints where required (hot soldering) | OSHA 1926.352 |
| Manage | Fall / cut | Manage the fall, cut, and soldering hazards | project |
Roof-edge fall protection and sharp-metal-edge/laceration control
A Sheet Metal and Flashing Trim AHA centers on roof-edge fall protection and sharp-metal-edge/laceration control. The roof-edge fall protection addresses the edge/fascia work — controlled by roof-edge fall protection (fall protection at the edge, safe access). The sharp-metal-edge/laceration control addresses the cut metal edges — controlled by sharp-metal-edge and laceration controls (cut-resistant gloves and sleeves, careful handling, deburring). And the fabrication, fastening, soldering, and eye get tool/soldering and eye controls. An AHA built on roof-edge fall protection and sharp-metal-edge/laceration control, with tool/soldering controls, addresses the hazards that define sheet metal and flashing trim.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, sheet metal and flashing trim installs the sheet-metal trim, edge metal, fascia/drip edge, coping trim, and flashing trim that complete and weatherproof the roof edge and details, and it closes the flashing/sheet-metal group with the same edge-and-sharp-metal profile as flashing work, plus soldering. The at-height-roof-edge and fall hazard is a primary defining concern — sheet-metal trim and flashing trim is installed at the roof edges, fascia, and transitions, the most exposed fall locations, right at the fall line, so fall protection at the roof edge (guardrails, personal fall arrest, warning-line systems as applicable) is especially critical, and the trim work puts the worker at the very edge or fascia. The roof-edge fall is the defining hazard.
The sharp-metal-edge-cut/laceration and the fabrication-fastening/soldering are the other defining hazards. On the projects I have run, cut and formed sheet-metal trim has very sharp edges (freshly cut or sheared edges are like blades — a serious laceration hazard, and handling long trim pieces drags the sharp edges across hands and arms — cut-resistant gloves and sleeves, careful handling, deburring/hemming where practical). And the fabrication- fastening/soldering hazard is that fabricating the trim involves cutting (snips, shears, powered metal-cutting) and bending/forming (brakes and forming tools — pinch), fastening (fastening tools), and soldering the joints and seams of metal trim and flashing — soldering irons or torches and molten solder are a hot-soldering burn hazard, the soldering flux gives off fumes, and where a torch is used there is an open-flame fire hazard, so burn protection, ventilation for flux fumes, and fire protection for torch soldering matter. The eye hazard rounds it out. The AHA built on roof-edge fall protection and sharp-metal-edge/laceration control is the one that protects the trim crew.
The bottom line
A Sheet Metal and Flashing Trim AHA names the at-height-roof-edge/fall, the sharp-metal-edge-cut/laceration, and the fabrication-fastening/soldering hazards with specific controls — roof-edge fall protection (fall protection at the edge/fascia where the work concentrates, safe access), sharp-metal-edge and laceration controls (cut-resistant gloves and sleeves, careful handling, deburring/hemming edges), and fabrication-fastening and soldering controls (safe cutting/bending/fastening, soldering burn protection, flux-fume ventilation, torch-soldering fire protection). The roof-edge fall protection and the sharp-metal-edge/laceration control are the defining concerns. The AHA that manages both is the one that protects the crew.
Frequently asked questions
Why is the roof-edge fall the defining hazard?
Sheet-metal trim and flashing trim is installed at the roof edges, fascia, and transitions, the most exposed fall locations, right at the fall line, so the trim work puts the worker at the edge/fascia. Controls are roof-edge fall protection (fall protection at the roof edge — guardrails, personal fall arrest, warning-line systems as applicable; safe access), and the fall controls.
Why are sharp metal edges a serious hazard?
Cut and formed sheet-metal trim has very sharp edges — freshly cut/sheared edges are like blades (a serious laceration hazard), and handling long trim pieces drags the sharp edges across hands/arms. Controls are sharp-metal-edge and laceration controls (cut-resistant gloves and sleeves, careful handling, deburring/hemming edges where practical), and the laceration controls.
What fabrication, fastening, and soldering hazards apply?
Fabricating the trim involves cutting (snips/shears/powered metal-cutting) and bending/forming (brakes/forming tools — pinch), fastening (fastening tools), and soldering the joints/seams (soldering irons/torches and molten solder — the hot-soldering burn hazard, flux fumes, and open-flame fire hazard where a torch is used). Controls are fabrication-fastening and soldering controls (safe cutting/bending/fastening, soldering burn protection, ventilation for flux fumes, fire protection for torch soldering), and the tool/soldering controls.
What is sheet metal and flashing trim?
Sheet metal and flashing trim is the installation of sheet-metal trim and flashing — the sheet-metal trim, edge metal, fascia/drip edge, coping trim, and flashing trim installed at roof edges, fascia, and transitions to complete and weatherproof the roof edge and details. Because the work concentrates at the exposed roof edge/fascia (fall), the cut metal edges cause serious lacerations, and the trim is fabricated, fastened, and soldered, those hazards apply.
Related AHAs and JHAs
- Flashing and Sheet Metal AHA — the flashing and sheet-metal fundamentals
- Sheet Metal Roofing AHA — the related sheet-metal roofing
- Roof Specialties AHA — the related roof specialties
- Roof Flashing Installation JHA — the roof-flashing fundamentals
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.