Metal roofing is well known for its long service life. If it’s done correctly, a steel building in Arkansas can outlast the mortgage, the vehicles inside, and, in many cases, the original owner’s plans for the property . However, “done right” is doing much in that sentence since most early failures of metal roofs happen for a few reasons that are almost the same, with most of them being unrelated to the metal itself.
The material is rarely the problem. Installation decisions, product selection, and what happens at the details like the edges, the penetrations, the fasteners, are where metal roof problems start. Understanding those failure points before a roof goes up is how you avoid dealing with them five years after it does.
Fastener Problems on Exposed Fastener Systems
Exposed fastener roofing is the most common metal roof system across Arkansas, and it performs well when the fasteners are installed correctly and the right washers are used. The rubber or neoprene washer that seals each fastener penetration is the weakest point in the system.
Those washers have a finite life. UV exposure, thermal cycling through Arkansas summers and winters, and simple age cause them to harden, crack, and eventually fail. When that happens, water gets in at the fastener location in a way that’s not immediately obvious from inside the building. By the time a water stain appears on the interior, the moisture has usually been infiltrating for a while.
Two things prevent this from becoming a serious problem:
- Use quality fasteners and washers from the start rather than the cheapest option available
- Include fastener condition in any periodic roof inspection, because catching a deteriorated washer early means a simple replacement rather than dealing with damage that’s had months to develop
The standing seam alternative. Standing seam systems eliminate this issue entirely because panels attach through concealed clips rather than through the panel face. No exposed fastener penetrations means no washers to fail. For buildings where long-term low maintenance is the priority, standing seam is worth the higher upfront cost for that reason alone.
Poor Flashing and Trim Detailing
The metalwork at all places where the roof surface changes to another component, such as ridge caps, eave trim, rake edges, wall transitions, and curbs around skylights and penetrations, is known as flashing. These details are where the majority of metal roof leaks come from, not on the face of the panel but at the connections between the panels and any adjacent material.
The common failure modes:
- Trim pieces cut short and not fully covering the transition point
- Sealant used instead of proper overlap and mechanical fastening at critical joints
- Ridge caps left unsealed at the ends
- Pipe boot flashings around penetrations sized incorrectly or not integrated properly with surrounding panels
Flashing, when it’s done right, is almost invisible. It seals all transitions, guides water away from infiltration points, and allows for thermal movement with no gaps opening due to expansion and contraction of the metal. Poorly executed flashing can look good from the bottom up but tends to leak on the first heavy rain.
Metal Dreams fabricates custom trim and flashing for every build rather than using catalog pieces that approximate the right dimensions. Those transition points are where a roof either performs or doesn’t over the long term.
Panel Oil Canning
Oil canning is a waviness or rippling that occasionally occurs in metal panels, especially in low-angle light on flat roof sections. It has no impact on the structural performance but it is often a cause of concern for individuals who see it for the first time.
It happens because steel panels carry internal stress from the forming process. When that stress isn’t uniform across the panel width, the panel bows slightly between its attachment points.
What makes it worse:
- Wider panels with flatter profiles
- Panels attached too tightly without room for thermal movement
- Installation in conditions that don’t allow the panel to settle properly
What minimizes it:
- Narrower panels with more pronounced rib profiles
- Installing with appropriate tension rather than over-fastening
- Striations or minor ribs rolled across the panel face, which add stiffness and reduce bowing
Some degree of oil canning is considered normal in the metal roofing industry and doesn’t indicate a defect or performance problem. It’s most visible in certain light conditions rather than being a constant visual issue.
Coating Failure and Premature Corrosion
The metal roof’s paint system is the barrier between the steel substrate and the Arkansas environment. The coating will deteriorate over time due to UV exposure, humidity, biological growth on the shaded surfaces or the occasional acid rain event. The question now is how long this process takes and whether it gets to the steel before the roof has been able to serve its intended service life.
The visible signs of coating failure:
- Chalking across the panel surface
- Uneven fading in patches rather than uniform weathering
- Rust developing at cut edges where the coating doesn’t cover exposed steel
Cheap coatings fail faster. A panel from a low-tier producer with minimal coating weight looks identical on installation day to a panel with a quality Kynar-based paint system warranted for 40 years. The difference shows up three to five years later.
Metal Dreams uses domestic coil and creates panels in-state, guaranteed to last with a 40-year signed paint warranty against chalk, fade, chip and rust perforation. That warranty is not marketing boilerplate, but a true reflection of the quality of coating and is available because the supply chain is under control and not handed off to an anonymous distributor somewhere between an overseas mill and an Arkansas job site.
Cut edges deserve specific attention. The coating doesn’t cover the steel at a cut, which makes cut edges the most vulnerable point for corrosion on any metal panel. Proper trim installation covers most of them, but any cut edge that remains exposed benefits from a field-applied cut edge treatment to seal it against moisture.
What Happens When the Structure Moves and the Roof Can’t
Every building moves. Thermal expansion and contraction happen daily and seasonally. Wind load deflects framing slightly. Settlement over time shifts foundations. A roof system that can’t accommodate that movement develops stress concentrations at its fixed points.
How those stress concentrations show up:
- Fastener pull-through at over-tightened attachment points
- Panel cracking at connection locations
- Trim pieces opening at seams as thermal movement has nowhere to go
The attachment method matters as much as the panel itself:
- Standing seam panels attached through floating clips move longitudinally with thermal changes while staying securely attached to the structure
- Exposed fastener panels installed with appropriate spacing and torque give the system flexibility to handle movement without fasteners becoming stress risers
On larger structures like commercial buildings and wide-span shops across Fayetteville, Conway, Bentonville, Springdale, and Pine Bluff, the thermal movement calculation is part of the engineering process. A 100-foot steel roof panel can expand by a meaningful fraction of an inch between a cold January morning and a hot July afternoon. That movement needs somewhere to go, and the roof system needs to be designed to provide it.
Plan Your Building With a Clear Estimate
Metal Dreams builds across all of Arkansas with crew routes to every corner of the state. Every project starts with a written estimate, no deposit required, and no obligation to talk through what your building actually needs before committing to anything.
