To screw corrugated metal roofing, you need to use the right fasteners, proper spacing, and correct technique to keep water out and secure your roof for decades. Corrugated metal roofs are strong and can last 40 to 80 years, according to RubyHome (2025). They are popular because they cost between $5.50 and $11.50 per square foot installed. Getting the screws right is the most important part of a long-lasting metal roof. Bad screw placement leads to leaks and rust. This guide shows you how to do it correctly.
What Type of Fasteners Do You Need?
Use self-tapping metal roofing screws, not regular nails or bolts. These screws have a pointed tip that cuts through metal. They also have a rubber washer underneath to seal the hole and stop water from leaking in.
The washer is critical. It keeps rain out and prevents rust at the screw hole. Choose screws that match your metal roof color. This protects the metal from UV damage.
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How Far Apart Should Screws Go?
Space your screws 12 to 18 inches apart along each ridge. In high-wind areas, use 12-inch spacing. Place them at the top of each corrugation wave.
Always screw through the high point, not the valley. The high point creates a better seal and keeps water out. According to ServiceTitan (2025), metal roofing is growing in popularity because it resists fire, weather, and lasts 40 to 80 years. Proper fastening makes this lifespan possible.
| Fastener Type | Best For | Spacing |
|---|---|---|
| Self-tapping metal screws (5/8″) | Metal to metal | 12-18 inches |
| Self-drilling screws (1″) | Metal to wood | 12-18 inches |
| Stainless steel screws | Salt air, wet climates | 12-18 inches |
What Is the Right Screwing Technique?
Pre-drill holes if your metal is very thick. Use a drill bit slightly smaller than your screw diameter. This stops metal from splitting or tearing.
Screw at a 90-degree angle straight down. Do not tilt or angle the screw. Tilting causes the washer to sit crooked and lets water slip in.
Tighten screws firmly but do not over-tighten. Over-tightening crushes the rubber washer and creates gaps where water enters. The washer should be snug but not squeezed flat.
Why Does Metal Roofing Matter?
Metal roofs are chosen by homeowners for their durability. According to RubyHome (2025), corrugated metal costs $5.50 to $11.50 per square foot and lasts 40 to 80 years. For a 1,700 square foot roof, installation ranges from $9,350 to $19,550.
Proper screw placement ensures your metal roof stays watertight and avoids costly leaks. Each screw protects your home from rain, snow, and wind. Taking time to screw it right saves money on repairs later.
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Contact a qualified roofing contractor for expert guidance on roof repair, replacement, or installation.