On a coastal solar farm or a seaside roof, a cheap fastener is the most expensive part of your project. Most teams default to stainless steel, thinking it’s the safe bet against rust. But if the screw fails to install cleanly or needs replacing in five years, you’ve lost.
The real cost isn’t the price per piece—it’s the labor to install it, the downtime if it fails, and the nightmare of accessing it later for repair. This is why bi-metal screws are changing the calculus. They’re chosen not because they’re “better,” but because they control total cost where it matters most: in the field, over decades.