Where metal makes sense
Metal belongs on roofs with enough slope to shed water: pre-engineered metal buildings, churches, retail with mansards, and low-slope roofs of about 1/4:12 and up with the right panel system. On a dead-flat roof, a membrane is the better answer. Standing seam panels run continuous from ridge to eave with raised, concealed-fastener seams, so there are few holes through the roof for water to find.
How much does a commercial metal roof cost?
| System | Installed cost / sq ft | Service life |
|---|---|---|
| Standing seam (new or replacement) | See costs | 40 – 70 yrs |
| Exposed-fastener panel | Lower | 20 – 30 yrs; fasteners need periodic attention |
| Metal restoration coating | See costs | Adds 10 – 20 yrs |
The up-front cost is the highest of the common systems. Spread across a 50-year life with minimal maintenance, the cost per year is among the lowest.
Aging metal roofs: restore before you replace
Many metal buildings in Kansas and Georgia are 25 to 40 years old with exposed-fastener panels. The usual problems are rust at laps and fasteners, backed-out screws and failed sealant at the seams — not failed panels. Re-fastening, sealing the seams and applying a restoration coating typically costs a fraction of re-roofing and resets the clock.
Metal and hail
Hail dents metal, and dents that break the paint film invite corrosion. Heavier gauges and profiles with stiffening ribs resist it better. After a storm, metal damage is usually easy to see and document — which makes claims more straightforward than on membrane roofs.
Frequently asked questions
How long does a metal roof last?
Standing seam systems commonly last 40 to 70 years. Exposed-fastener systems last less and need fastener maintenance along the way.
Is metal noisy in rain?
Over a properly insulated deck, no more than any other roof. The noise reputation comes from barns and sheds with no insulation.
Can metal go over an existing roof?
Often yes, with a sub-framing system, which avoids tear-off. We check the structure first.
Commercial metal roofing in: Kansas City · Topeka & NE Kansas · Metro Atlanta
