Why metal roofs fail at the details, not the panels
Most metal commercial roofs we inspect in Indiana have decades of life left in the panels themselves. What's failing is everything around them: rusted fasteners, blown gaskets, separated seams, deteriorated penetration flashings, and surface oxidation. Restoration addresses those failure points directly, leaving the structurally sound panels in place.
The restoration process
1. Inspection and assessment
A thorough walk-over to identify fastener condition, seam integrity, rust areas, penetration condition, and panel deflection. This determines whether the roof is a restoration candidate at all.
2. Cleaning
Power washing to remove dirt, chalking, and loose oxidation so the coating system bonds to clean metal.
3. Fastener replacement
Backed-out screws are replaced with oversized stainless or coated fasteners with new neoprene-bonded washers. On a 60,000 square foot roof this can be 3,000 to 5,000 fasteners.
4. Seam and penetration treatment
Butyl tape and reinforcing fabric over panel seams, ridges, and around every penetration. This is where the coating system gets its long-term watertight integrity.
5. Rust control
Rust converter or primer on any areas with active corrosion to stop the spread before the coating goes on.
6. Reinforced coating system
A primer coat, base coat, and top coat applied at manufacturer-specified mil thicknesses. Silicone is the most common choice in our climate because it doesn't soften in the summer or get brittle in the winter.
What it costs versus replacement
Metal roof restoration typically runs $4 to $8 per square foot in Northern Indiana. A full metal roof tear-off and replacement on the same building can run $12 to $20 per square foot. On a 60,000 square foot industrial facility in Fort Wayne, that's the difference between roughly $300,000 and roughly $900,000.
Energy savings
Reflective silicone coatings dramatically reduce rooftop temperature. We've measured 60 plus degree differences between coated and uncoated portions of the same roof on hot Indiana afternoons. Owners with high cooling loads often see noticeable utility savings the first summer after restoration.
When restoration is not the answer
- Significant deck or purlin damage. The structure has to be sound.
- Widespread panel rust-through, not just surface oxidation.
- Severe panel deflection or movement.
- The roof has been coated previously and the prior system has delaminated.
Warranty
Properly installed restoration coating systems carry manufacturer warranties of 10, 15, or 20 years, including labor coverage on most premium systems. Annual inspections are typically required to keep warranties valid.
Real-world example
We restored a 60,000 square foot standing seam metal roof on a Fort Wayne manufacturing plant. The roof had 3,400 backed-out fasteners, seam separation across multiple panel runs, and visible rust at the laps. Replacement quotes were in the $700,000 to $900,000 range with multi-week production disruption. Restoration came in at roughly $320,000, was completed with no production interruption, and the building got a 15-year manufacturer warranty out of it. Five years in, no leaks. Owner is on schedule to amortize the savings across a roof that will go another 10 to 15 years before the next decision point.