When dealing with heavy snow and ice, the choice of exposed fasteners for metal roofing is crucial to ensure long-lasting performance and avoid leaks. The best fasteners are typically made from stainless steel or coated carbon steel with corrosion-resistant finishes like neoprene washers and EPDM gaskets. Stainless steel fasteners are highly resistant to rust and can withstand prolonged exposure to moisture from melting snow and ice. Meanwhile, fasteners with special coatings like zinc-aluminum alloys or ceramic coatings provide a durable barrier against corrosion but may cost less than stainless steel. The neoprene or EPDM washers create a tight seal around the fastener holes, preventing water infiltration even under heavy snow loads. When diagnosing whether fasteners are suitable for your climate, check for signs of rust, loose screws, or compromised washers around the roof. A simple DIY check involves carefully inspecting fasteners after winter storms for corrosion or backing out, and ensuring the washers still look intact and flexible.
It's important to call a qualified roofer if you suspect fasteners are failing or if you notice water stains inside your home after snow melts. A roofer can confirm if the fasteners installed are appropriate for heavy snow regions, and perform any replacement with upgraded materials if needed. When talking to a contractor, ask if they recommend stainless steel fasteners specifically designed for snow-prone climates, and whether they back their installations with a warranty that covers corrosion or leaks due to weather exposure. It’s also helpful to inquire how often exposed fasteners should be inspected or maintained to extend the roof’s life. Taking these steps will help keep your metal roof secure, leak-free, and resilient when winter weather hits hard.