Metal Roofing Specialists
Metal roof repair demands correct materials — wrong metal combinations cause galvanic corrosion, wrong fasteners cause backing-out. Our licensed metal roof specialists match every panel, fastener, and sealant to your specific system. All residential and commercial metal systems.
Free Metal Roof Inspection & Estimate
Panel-matched materials · Correct fasteners · 5-yr warranty
Every metal panel system has a different profile, fastening method, thermal movement behaviour, and failure mode. Select your system to see the correct repair approach.
Standing Seam Cross-Section
Standing seam is the premium metal roofing system. Concealed clips allow thermal expansion without fastener holes in the panel face — eliminating the primary leak path of screw-down systems. The most durable residential and commercial metal system available.
Repair approach
Critical note
Standing seam panels must float freely to accommodate thermal movement (±1.5” per 100 ft). Any fastening through the panel face — including repair screws — will cause buckle and seam failure within 1–2 thermal cycles.
Corrugated Panel Cross-Section
Corrugated panels use exposed fasteners (screws with neoprene washers) driven through the panel at the crest of each wave. The neoprene washer creates the seal. Most common on agricultural buildings, barns, and budget residential. Primary failure mode is fastener deterioration — washers flatten, crack, and allow water entry after 10–15 years.
Repair approach
Most common mistake
Over-tightening replacement screws is the #1 corrugated repair error. Flattening the neoprene washer destroys the seal. Torque to snug — the screw head should compress the washer no more than flush with the panel surface.
R-Panel / PBR Cross-Section
R-Panel (also called PBR Panel) is the most common commercial metal roof system in the US. Exposed lap screws are driven at the major rib during overlap, keeping fasteners out of the panel flat and reducing leak paths vs. corrugated. Very easy to repair and replace individual panels.
Repair approach
Dissimilar metal note
R-panel is almost always galvanised or Galvalume steel. Never use copper or bare aluminium flashings on a steel R-panel system — galvanic reaction will rust the steel at every contact point within 3–5 years.
5V Crimp Cross-Section
5V Crimp is a classic panel profile with 5 V-shaped ribs per 24” panel, common in the Southeast US — particularly Florida, Georgia, and the Carolinas. It can be re-roofable over with newer metal systems without tear-off. Unlike standing seam, fasteners are in the panel flat, creating more potential leak points as washers deteriorate.
Repair approach
Florida hurricane note
5V Crimp in Florida requires Miami-Dade approved fastener patterns for hurricane compliance. Any repair must use approved fasteners at code-required spacing — confirm current FBC requirements before repair.
Metal Shingle Cross-Section
Metal shingles mimic the appearance of asphalt shingles, wood shake, or tile while offering the longevity of metal. Interlocking panels conceal fasteners. Stone-coated variants (DECRA, Gerard) have a granule coating that can chip on impact. Individual panel replacement is possible but requires sourcing exact-match product.
Repair approach
Sourcing note
Discontinued metal shingle products are the most difficult repair scenario. We work with all major manufacturers and distributors to source close-match replacement panels. Always bring a sample or photo of the existing panel when requesting a quote.
When two dissimilar metals contact each other in the presence of moisture, an electrochemical reaction causes the less noble metal to corrode accelerated. In roofing, this means using copper flashing on steel panels, or aluminium nails in a steel panel, causes the steel to rust rapidly at every contact point — far faster than it would without the mixed-metal repair.
Common incorrect material combinations we fix
| Roof Metal | Wrong Pairing | Effect | Correct Material |
|---|---|---|---|
| Galvanised steel | ✗ Copper flashing | Zinc stripped, rapid steel rust | Galvanised flashing |
| Galvalume steel | ✗ Copper gutters | Aggressive galvanic attack | Galvalume or powder-coat Al |
| Aluminium panel | ✗ Steel fasteners | Aluminium corrodes at screw holes | Stainless or Al fasteners only |
| Copper panel | ✗ Steel or Al flashing | Adjacent steel rots rapidly | Copper or stainless only |
| Zinc panel | ⚠ Aluminium adjacent | Mild galvanic — use isolator | Zinc or butyl tape isolation |
The most common mistake: A general roofing contractor installs copper step flashing on a Galvalume steel panel system because “copper is premium quality.” Within 3–5 years, the steel panels rust aggressively at every point copper water runoff contacts them. The repair costs more than the original roof. We never mix metals on a metal roof system.
When two metals from this list contact each other, the metal higher in the list (more “active”) corrodes faster. Larger gaps between metals = more aggressive reaction.
Pair metals adjacent in this list for minimal galvanic risk. Never pair metals more than 2 positions apart without an isolator (butyl tape, EPDM gasket, or paint barrier).
Each failure type has a specific cause and a specific repair approach. Identifying the failure correctly before repair prevents the same problem recurring.
Exposed screws back out due to thermal cycling — the panel expands and contracts daily, gradually loosening fasteners. The neoprene washer below the head cracks, allowing water under the head.
● Repair This SeasonSealant at panel laps, trims, ridge caps, and penetrations hardens and cracks with UV exposure after 8–12 years. Cracked sealant allows progressive water entry under the panel edge.
● Repair Before WinterRust at cut edges (where coating is damaged), at scratches through the coating, and at galvanic contact points. Surface rust is treatable; through-thickness rust requires panel replacement.
● Treat Before It SpreadsHail dents dimple the panel surface and can crack protective coatings. Large hail creates punctures. Dented panels are often structurally sound but coating-compromised — requiring treatment or replacement.
● Inspect After HailstormWavy or buckled appearance in the flat area of metal panels — caused by thermal stress or inadequate clearance. Primarily aesthetic but indicates the panel is under stress and may cause seam fatigue.
● Inspect for Seam StressMetal roof flashings at chimneys, walls, skylights, and eave trim are the most common leak source. Improper installation using wrong-metal flashings or inadequate overlap creates immediate and long-term failure points.
● Highest Leak RiskMetal roof repair costs vary by panel system, damage type, roof pitch, and accessibility. Here are typical ranges — your free written estimate after inspection will be exact.
| Repair Type | Typical Range |
|---|---|
| Fastener replacement (per 100 fasteners) | $300 – $800 |
| Sealant strip re-application | $400 – $1,200 |
| Panel dent repair / re-forming | $300 – $900 |
| Rust treatment + coating (per section) | $500 – $1,800 |
| Flashing repair or replacement | $400 – $1,500 |
| Single panel replacement | $500 – $2,000 |
| Seam repair (standing seam) | $600 – $2,500 |
| Multi-panel section replacement | $2,000 – $8,000 |
Why metal roof repair is a specialist job
Using the wrong flashing metal, fastener material, or sealant causes accelerated corrosion at every contact point. Correct metal matching is not optional — it’s the difference between a 5-year repair and a 6-month one.
A general contractor who screws through a standing seam panel face to “secure” it has destroyed the entire thermal movement system. The repair costs more than the original installation of that section.
We identify the exact panel profile, gauge, and finish before arrival. If exact-match panels are unavailable (discontinued products), we discuss options with you before scheduling — not after arrival when you can’t change course.
Commercial property managers and building owners receive certificates of insurance for their files, commercial invoices with project codes, and can arrange payment on NET-30 terms for qualifying accounts.
A properly maintained metal roof is the last roof a building will ever need. When something does fail, it’s almost always a localised, repairable issue — not a system-wide failure. The economics are completely different from asphalt.
Metal Roof Longevity by Material
"Two previous contractors both tried to fix my standing seam leak with lap sealant and screws — one of them actually drilled through the panel face. RoofRepair.co re-formed the seam properly with a hand seamer, replaced the damaged section with matching panels, and explained exactly why the previous repairs had failed. Two winters later, completely dry."
"We have a 40,000 sq ft warehouse with a 20-year-old R-panel roof that needed a full fastener replacement on two sections and rust treatment on the south face. RoofRepair.co scheduled the work over three weekends to avoid disrupting operations. Quoted fairly, delivered exactly what was scoped, and issued the commercial invoice the same week. Will be using them for annual maintenance."
"My 12-year-old corrugated steel roof took a bad hailstorm. RoofRepair.co documented 200+ impact dents and provided insurer-ready photos. Allstate approved the full panel replacement claim. The crew matched the Galvalume panels exactly, replaced all fasteners with new neoprene washers, and the whole job was done in two days. Premium discount applied — saving $320 per year."
Correct materials · Correct technique · 5-year warranty · Commercial & residential