Panels: the unit of metal roofing

Unlike shingles, which go on one small piece at a time, metal roofing goes on as panels, long formed sheets that each cover a strip of roof from one to three feet wide and often the full ridge-to-eave run in a single piece. The panel profile, the shape rolled into the sheet, is the fundamental choice in any metal roof: it determines how the panels join, whether the screws show, how the roof handles water at low pitches, what the finished roof looks like, and a large share of what it costs. Two roofs of identical steel can differ by double in price and decades in service life purely on profile.

This guide is the panel menu. It sits under our metal roofing pillar and alongside the types of metal roofing overview, and it links out to the deep guides on each major profile. If you are comparing quotes that name panels like “PBR”, “5V”, “R-panel” or “snap-lock”, this is the page that translates them.

The panel types

Exposed vs hidden fastening: the great divide

Every panel profile falls on one side of a line that matters more than brand, color or even gauge. Exposed-fastener panels (corrugated, ribbed, 5V) are screwed through the face into the structure, thousands of gasketed screws whose rubber washers weather, shrink and loosen over 10 to 20 years as the panels thermally cycle, committing the roof to periodic re-screwing and gasket replacement. Hidden-fastener panels (standing seam, interlocking shingles) attach with concealed clips or locks, no washer ever sees sunlight, and the maintenance cycle largely disappears, at a price premium of roughly half again or more.

Neither side is wrong; they serve different buildings. A barn, shed or budget re-roof takes exposed fasteners knowingly and re-screws once a decade. A home you plan to keep deserves the hidden-fastener conversation, because the premium buys out the entire washer-failure mode for the life of the roof. Wherever a quote lands, make sure it says which side of the line it is on, and that you chose it on purpose.

Choosing the right panel

By building: homes lean standing seam or metal shingles (hidden fasteners, architectural looks); barns and outbuildings lean ribbed and corrugated (economy, speed, structural spans); porches and accents take corrugated or 5V for charm. By climate: hail country favors thicker steel; salt coast demands aluminum; heavy snow loves the clean shedding of standing seam with snow guards; hot sun rewards PVDF-finished reflective colors from our colors guide. By pitch: below about 3:12, exposed-fastener laps become leak risks and mechanically seamed standing seam becomes the safe metal answer.

By budget: the honest ladder runs 29-gauge corrugated, 26-gauge ribbed, metal shingles, snap-lock standing seam, mechanical-seam standing seam, each step buying fastening quality, finish and lifespan. Our metal cost guide puts numbers to the rungs.

Buying and installing panels

Buy panels cut to your actual roof, full-length wherever possible, with the trim package (ridge, eave, rake, valley, gable, boots) from the same system, mismatched or improvised trim is where panel roofs leak first. Confirm coating, gauge and paint in writing, insist on same-system screws with quality washers for exposed-fastener work, and use an installer fluent in metal: shears not abrasive saws, correct screw torque (snug the washer, never crush it), straight screw lines, and clean panel handling, the craft our metal installation guide walks through. Underlayment still matters under metal, high-temp synthetic and ice-and-water at the edges, as our underlayment guide explains.

Installed to that standard, panel roofing is the most durable mainstream roof there is, and the menu above means there is a panel for every building and budget on the property, from the house to the last shed. We supply and install every profile across our service areas.

Metal panel FAQs