Many of Fasto’s customers use bimetal self-drilling screws in places where the fasteners stay exposed for a long time — metal roofing, wall cladding, HVAC structures, or small utility stations near the coast.
As project lifespans get longer, one question keeps coming back: what actually happens to these screws after years of sun, rain, and temperature swings?
The answer is simpler than it looks. Instead of sudden failure, long-term exposure usually brings slow, predictable changes. This article walks through what typically happens over time, what buyers tend to look at during inspections, and what field usage tells us about durability.
