You put screws in metal roofing along the high points of the raised ribs, not in the valleys or low areas. The screws go through the metal panels into the structural framing below. This placement keeps water from pooling around the screw holes. Metal roofs are growing in popularity because they last 40 to 80 years, much longer than asphalt shingles which last only 20 to 30 years. According to RubyHome (2025), metal roofing costs between $10.00 and $17.05 per square foot installed. Getting the screw placement right is key to preventing leaks and keeping your roof strong.
Why Screw Placement Matters
Placing screws in the wrong spot can cause big problems. If you put screws in the valleys, water will collect around them and drip into your home. The high ribs are the best spot because water runs down the sides instead of pooling at the screw.
Metal roofing holds 17% of the residential roofing market share in the U.S., according to the Metal Roofing Alliance (2024). Homeowners choose metal because it resists storms and lasts decades. But proper screw placement is what keeps that protection working.
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Where to Put Your Screws
Always screw into the high ridges of the metal panels. These are the raised bumps that run across your roof.
The screws should go straight through the metal and into the wood or steel framing underneath. Space your screws about 12 to 24 inches apart along each rib. Use the right size screw, usually a number 10 or 12 hex head screw with a rubber washer. The rubber washer stops water from leaking through the hole.
| Screw Placement Guide | Details |
|---|---|
| Location | High ribs only, never in valleys |
| Spacing | 12 to 24 inches apart |
| Depth | Through metal into frame below |
| Washer Type | Rubber or neoprene washer required |
Common Mistakes to Avoid
Do not over-tighten your screws. Over-tightening can crack the rubber washer and let water in. Just tighten until the washer is snug but not crushed.
Never put screws in the low areas between the ribs. According to RubyHome (2025), improper installation can lead to higher long-term costs from water damage and leaks. Always follow the manufacturer’s guide for your specific metal roof. Different panels may have slightly different screw requirements.
Why Metal Roofing Wins
Metal roofs are fire resistant and can withstand extreme weather. According to This Old House (2025), metal roofing lasts 40 to 80 years compared to asphalt shingles at 20 to 30 years. When you place screws correctly in the ribs, your metal roof will protect your home for decades. Proper screw placement is a small step that makes a huge difference in roof life and performance.
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Connect with an experienced roofing company to discuss your roofing needs and schedule an inspection.