Standing-seam metal,
built to last,
engineered for the storm.

Different Types of Roof Flashing

A metal roof relies on several distinct flashing types, each shaped for a different vulnerable spot on the roofline. Valley flashing sits in the V-shaped channel where two roof planes meet, one of the most exposed areas on any roof and a common leak point if the metal isn’t formed and lapped correctly. Drip edge runs along the eaves and rakes to direct water off the roof edge and into the gutter instead of behind the fascia. Step flashing and counter-flashing wrap chimneys and sidewalls, layered piece by piece so each course sheds water onto the one below it. Parapet flashing is its own category, built to cap and seal the low walls that rise above the roofline on many low-slope and commercial sections, where standing water and wind uplift put extra stress on the seams.

Penetration flashing, the boots and collars around vent pipes, skylights, and roof-mounted equipment, has to move with a metal panel’s thermal expansion without loosening. On a metal roof, all of these pieces are typically cut and bent from the same coil stock as the panels, so a Galvalume roof gets Galvalume flashing and a copper roof gets flashing that will develop the same copper patina as the field panels over time. That consistency in metal type matters more here than on other roofing systems, since mismatched metals at a flashing joint can drive galvanic corrosion. Homeowners comparing this level of flashing detail against a sloped alternative often look at our tile roof page, or at roof shingles if they want a lower-cost sloped option, before deciding which system’s flashing needs fit their home.

Do you install metal roofing shingles

No. What most people picture when they hear “metal shingles” is a stamped panel cut to look like individual shingle tabs, and that is not a product line we install. Our metal work is built around standing seam panel systems, which run in long vertical panels from ridge to eave rather than small interlocking pieces. The panels come in a standard width with a raised profile, and the seams between panels lock together mechanically, which is a different water-shedding approach than a shingle-style metal product relies on.

There is a reason for that focus. Standing seam panels have fewer seams and fastener penetrations across the field of the roof than a shingle-style metal system, since the panel runs the full slope length instead of stacking short overlapping pieces. That matters most in a place like South Florida, where wind uplift and wind-driven rain are the main things a roof has to resist. The panel gauge also matters here: a lower gauge number means a thicker, heavier panel, and we install panels at a standard gauge that holds up to that kind of load better than a thinner sheet would.

We also work across substrate types rather than one fixed product. Steel with a Galvalume coating, aluminum, and copper are all options, and each behaves differently over time. Homeowners drawn to the look of a distressed or textured metal surface are often really after the weathered look of natural copper patina, which is a substrate choice, not a shingle-shaped panel. If your roof has a lot of hips, valleys, or dormers where a shingle-style product might actually simplify cutting, it is worth a direct conversation with Istueta Roofing about whether standing seam still makes sense for that specific layout, or whether tile roof or roof shingles options fit the shape of your home better.

Where can I find 12 ft metal roofing panels

Twelve-foot panels are a standard long-panel length for standing seam and exposed-fastener metal roofing, and they’re typically ordered through a roofing contractor rather than picked up off a shelf at a home center. Most big-box stores only stock shorter, pre-cut panels in a handful of colors. A contractor who works directly with metal fabricators can order panels cut to the exact run length your roof needs, including 12 ft lengths, in the substrate and gauge that fits your project.

When you’re sourcing panels, the substrate and thickness matter more than the length itself. Steel panels are commonly coated with Galvalume, a metallic blend of aluminum, zinc, and silicon that protects the steel from corrosion, while aluminum panels are a separate option worth comparing if you’re near saltwater. Panel thickness is described by gauge, and it runs backward from what you’d expect: a lower gauge number means a thicker, heavier panel, so a 24-gauge sheet is noticeably sturdier than a 26-gauge sheet cut to the same 12 ft length. Ask whoever is supplying your panels which gauge they’re quoting before comparing prices, since two 12 ft panels can look identical but differ a lot in stiffness and dent resistance.

If you’re still deciding between materials before you get to panel specifics, it helps to compare metal against other systems side by side. Homeowners on flatter roofs sometimes look at epdm roofing instead, while those on sloped roofs weigh metal against a tile roof or standard roof shingles before settling on panel length and substrate.

Roof-To-Wall Flashing

Roof-to-wall flashing is the metal strip installed where a metal roof plane meets a vertical wall, such as a dormer, a second-story addition, or a parapet on a low-slope section. Its job is to bridge the gap between two different surfaces so wind-driven rain cannot work its way in behind the siding or up under the panels. On a metal roof this detail carries more weight than it does on shingles, because metal panels expand and contract with temperature swings, and the flashing has to accommodate that movement while staying sealed at the wall line.

There are two pieces working together at this joint. Step flashing (or continuous flashing on longer straight runs) sits under the wall covering and laps over the top of each panel course, while a counter-flashing or reglet cut into the wall material overlaps the step flashing from above. This layered, overlapping approach keeps water moving down and out even during heavy, sideways rain, which matters in a market like South Florida. The flashing itself is typically cut from the same substrate as the roof system, whether that’s Galvalume, aluminum, or copper, so it expands at a similar rate to the panels and doesn’t telegraph a different weathering pattern over time.

Walls aren’t the only place a metal roof needs this kind of transition detail. Valleys, where two roof planes meet, and parapets on flat sections both call for their own flashing approach, and getting any one of these wrong is a common source of leaks that has nothing to do with the panels themselves. If you’re comparing how metal handles these junctions against other systems, our epdm roofing page covers how flat roofs handle parapets and wall transitions differently.