To fasten corrugated metal roofing, you need to use special fasteners that hold the metal sheets tight to your roof frame. Corrugated metal roofs are strong and can last 40 to 80 years, according to industry data on roof lifespan. The fasteners must go through the valleys, not the peaks, of the corrugated sheets. You will also need rubber washers and a drill with the right bit. Getting this right keeps water out and makes your roof last longer.
What Fasteners Do You Need?
Use metal roofing fasteners with rubber washers. The washers seal the hole so water does not leak in. Fasteners should be 1.5 to 2 inches long. You can use screws or pop rivets, but screws are easier for most people.
According to RubyHome, corrugated metal roofing costs between $5.50 and $11.50 per square foot when installed. Using the right fasteners protects that investment and helps avoid costly repairs later.
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Where Should Fasteners Go?
Fasteners must go into the valley of each corrugation wave. Never put them on the peaks.
Space fasteners 12 to 24 inches apart along each row. Use more fasteners in areas with high wind. The pattern should look like straight lines down your roof.
How Do You Install Fasteners?
Drill a pilot hole first. This prevents the metal from cracking. Place the rubber washer on the fastener before you drill.
Use a cordless drill set to medium speed. Do not drill too fast or the fastener may split the metal. Tighten fasteners snug, but not overly tight. The rubber washer should compress slightly.
According to This Old House, metal roofing can last 40 to 80 years with proper installation. Correct fastening is a key part of that durability.
Fastener Spacing and Pattern Guide
| Location on Roof | Fastener Spacing | Number per Row |
|---|---|---|
| Field (middle area) | 24 inches apart | 2-3 per row |
| Edge rows | 12 inches apart | 4-5 per row |
| High wind zones | 12 inches apart | 6+ per row |
Metal roofing holds about 17% market share in U.S. residential roofing, according to the Metal Roofing Alliance 2024 data. More homeowners are choosing metal because it is durable and energy efficient. Proper fastening keeps your metal roof performing well for decades.
Always use fasteners rated for metal roofing. Regular screws or nails will rust and fail quickly. Quality fasteners with rubber washers are worth the extra cost. Your roof will thank you for the next 50 years.
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Talk with a local roofing contractor to review your options and get a detailed estimate for your project.