Which is better, a tin roof or shingles?
Short answer. What people call a tin roof today is usually exposed-fastener steel panels such as corrugated, 5V or R-panel. They can cost less than standing seam and last a long time on barns, cabins and farmhouse-style homes, but their thousands of rubber-washered screws need periodic attention, so for a typical suburban Georgia home architectural shingles are usually the better all-round choice.
What a tin roof really is
True tin plate roofing largely disappeared long ago. Modern panels are Galvalume or galvanized steel, often 29 or 26 gauge, screwed through the face into purlins or a deck. That through-fastening is the defining feature and the main weakness.
Where panels do well
- Barns, sheds, carports and porches.
- Mountain cabins and farmhouse-style homes in North Georgia, where the look fits.
- Low-maintenance outbuildings where an occasional drip is not a crisis.
Where shingles do better
- Leak risk. Every exposed screw is a penetration sealed by a rubber washer that ages in sun. Washers commonly need checking and some screws replacing after a decade or two. Shingles have far fewer penetrations.
- Neighborhood fit. Most HOAs and suburban streets expect shingles.
- Complex roofs. Valleys, dormers and many penetrations are harder to detail with exposed-fastener panels.
- Noise. Panels over open purlins without a solid deck are noticeably loud in rain. Over a deck and underlayment, the difference shrinks.
- Condensation. Panels without proper underlayment can drip condensation in humid weather.
Cost
Exposed-fastener metal often lands closer to shingle pricing than standing seam does, but quality installation with underlayment, closures and proper trim narrows the savings.
A fair verdict
For a home in a typical Georgia subdivision, architectural shingles. For a cabin, barn or farmhouse where you accept periodic screw maintenance, panels can be a sensible, long-lived choice.
See metal roofing in Georgia and architectural vs 3-tab shingles.