Roofing types · Metal Roofing
Metal roofing: decades of life — living in the details.
A metal panel can outlast every membrane on this site. But the roof isn’t the panel — it’s ten thousand fasteners, every seam, and every penetration, and those age on a much shorter clock than the steel.
Schedule My Free Roof Assessment01 · The system
What metal roofing is — and how it works.
Commercial metal roofing splits into two families: standing seam, where concealed clips let panels float through thermal movement, and exposed-fastener (R-panel, corrugated), where thousands of gasketed screws hold the roof down — and every one is a future maintenance item.
Thermal cycling is the engine of metal roof aging: panels grow and shrink daily, backing fasteners out, working seams, and fatiguing sealants. The panels themselves? Often good for half a century. Managing metal means managing everything attached to it.
System profile
- System
- Standing seam / exposed fastener
- Panels
- Steel (Galvalume) / aluminum
- Attachment
- Concealed clips / gasketed screws
- Typical service life
- 40–60 yrs panels; details less
- Surface
- Factory finish / field coated
- Infrared candidacy
- Different physics — moisture found by other means
02 · Straight talk
Where metal roofing excels — and what to watch.
Where it excels
Panel longevity
Well-finished steel and aluminum panels routinely serve 40–60 years.
Snow and shed performance
Slope and slick surfaces shed water and snow — a Minnesota advantage.
Restoration economics
Fastener programs plus seam sealing plus coating restoration regularly beat replacement by 60–70%.
Recyclability
End-of-life panels have scrap value; tear-off economics differ from membrane roofs.
What to watch
Fastener back-out
Thermal cycling backs screws out and ages gaskets — the #1 exposed-fastener leak source, on a predictable schedule.
Seam separation
Standing seams and end laps work open under movement; early detection is a walk-and-probe, not a guess.
Edge and cut rust
Corrosion starts at cut edges, scratches, and dissimilar-metal contacts long before the field shows it.
Condensation confusion
Many ‘metal roof leaks’ are interior condensation — a diagnosis distinction that saves owners real money.
Infrared plays a different role on metal — there’s usually no absorbent insulation above deck to hold a signature. So we find water the way the system demands: tracing, testing, and honest diagnostics.
03 · The lifecycle
How we manage metal roofing — from baseline to replacement.
A fastener, seam, and corrosion survey — plus leak tracing that distinguishes real leaks from condensation.
LionCare runs fastener checks, sealant renewal, and drainage clearing on the thermal-cycling schedule metal actually lives on.
Fastener replacement programs, seam mechanical re-locks and sealing, panel repair, and rust remediation — matched to the system.
Metal is the best restoration candidate there is: acrylic and reinforced coating systems re-seal every fastener and seam in one pass.
When section loss or structural corrosion ends the road, replacement or retrofit — including recover options that skip tear-off entirely.
04 · Questions
Frequently asked questions.
What owners ask about metal roofing roofs.
My metal roof leaks at hundreds of screws. Is it done?
Almost never. A fastener program — oversized replacement screws with new gaskets — plus a reinforced coating over every fastener head routinely delivers 15–20 more warranted years at a fraction of replacement. It’s the strongest restoration math in roofing.
Can you infrared-scan a metal roof?
Metal’s construction usually doesn’t hold the thermal signature infrared reads — so we say so, and use the right tools instead: leak tracing, seam probing, and water testing. The diagnosis is just as definitive.
Is it a leak or condensation?
On metal buildings, a meaningful share of ‘roof leaks’ are interior condensation on cold panels. The fix is completely different — ventilation and vapor control, not roofing. We diagnose before anyone spends money on the wrong problem.
Evidence first
Own a metal roof? Count the details before they count.
Fasteners, seams, corrosion, condensation — one survey separates the 40-year panel from its 10-year details, and prices the difference.
Schedule My Free Roof Assessment651-780-7663 · info@lionstarcommercialroofing.com