Where to Put Screws in Metal Roofing

Where to Put Screws in Metal Roofing: A Step-by-Step Guide for a Secure Install

If you’re installing a metal roof, one question is bound to come up: Where to put screws in metal roofing? It might seem like a simple detail, but getting it wrong can mean leaks, loose panels, or worse—your roof not holding up against high winds.

Many guides out there touch on the basics, but we’re going beyond that. We’ll cover not only the where but also the why, plus a few insider tips that most homeowners never hear about. And if you’re in the Buda, TX area, Coach Roofing is here to help with professional roofing services so you don’t have to worry about a single misplaced screw.

Let’s dive in.

Why Screw Placement Matters

You might think, “As long as the screws hold the panels down, what’s the big deal?” But improper screw placement is actually one of the leading causes of metal roof failure.

A study by the Metal Construction Association found that incorrect screw placement increases the chances of leaks by 25% within the first five years. That’s a major problem when you’re expecting your roof to last decades.

Here’s what happens when screws aren’t placed correctly:

• Leaks: Water sneaks in around the screws, causing rot, mold, and damage to your home.
  
• Loose Panels: If screws aren’t secure, strong winds can rip panels right off.
  
• Warping & Buckling: Metal expands and contracts with temperature changes, and bad screw placement can cause panels to warp over time.
  

Avoiding these issues starts with understanding the best places to put your screws.

Flat or Rib? The Big Debate

There are two common places to put screws on a metal roof:

1. On the Flat (aka “Pans”)
   
   • Pros: Creates a tighter seal since the screw sits flush with the panel.
     
   • Cons: Screws are more exposed to water flow, so they need extra sealing to prevent leaks.
     
2. On the Rib (aka “High Points” or “Corrugations”)
   
   • Pros: Keeps screws away from water, reducing the risk of leaks.
     
   • Cons: This can cause the panel to deform if over-tightened, leading to uneven surfaces.
     

So, which one is better?

Most roofing manufacturers recommend placing screws on the flat parts of the panel. This ensures a solid connection to the underlying structure and prevents screws from pulling out over time. However, if you live in an area with heavy rain, rib placement might be better for keeping water away from screw holes.

What Most Guides Don’t Tell You About Screw Placement

Beyond just “flat or rib,” there are some key factors that many people overlook when installing metal roofing. Here’s what you really need to know:

1. Screw Spacing is More Important Than You Think

A common mistake is placing screws too far apart. This leaves panels vulnerable to wind damage.

The general rule? Screws should be:

• 12-18 inches apart along the length of the panel
•  24-30 inches apart across the width

If you live in a high-wind area, closer spacing (like 12 inches) is a good idea.

2. Use the Right Type of Screws

Not all screws are made equal. Look for:

• Self-tapping screws (for easier installation)
  
• Neoprene washers (to create a waterproof seal)
  
• Corrosion-resistant materials (like stainless steel or galvanized coatings)
  

Cheap screws will rust fast, leading to roof failure long before you expect it.

3. Don’t Over-Tighten

One of the biggest mistakes homeowners make is cranking screws down too hard. This crushes the washer, which can lead to leaks over time.

A properly installed screw should be snug but not overly compressed. Using a drill with an adjustable torque setting can help prevent over-tightening.

4. Pre-Drilling Helps Avoid Mistakes

For thicker metal panels or wooden substrates, pre-drilling screw holes ensures:

• Perfectly straight screws
  
• No accidental metal shavings
  
• A cleaner, more professional finish
  

Pre-drilling might take a little extra time, but it makes the job look 10x better.

5. Thermal Expansion is Real

Metal expands when it heats up and contracts when it cools down. If screws are too tight or placed in a way that restricts movement, panels can warp over time.

To prevent this, make sure screws are tight but not crushing the metal, and follow the recommended spacing guidelines.

Step-by-Step Guide to Proper Screw Installation

Now that you know the why, here’s how to do it right:

1. Read the Manufacturer’s Guidelines

Every metal roofing system has slightly different installation requirements. Check the manual to avoid any surprises.

2. Choose High-Quality Screws

Avoid cheap, rust-prone screws. Invest in ones that will last as long as your roof.

3. Plan Your Screw Pattern

Use a chalk line to mark exactly where the screws will go before you start drilling. This keeps everything neat and consistent.

4. Drill Straight & Avoid Over-Tightening

Use a steady hand and apply consistent pressure. If you’re unsure, start slow and adjust as needed.

5. Inspect Your Work

Once all screws are in, go back and check that they’re snug but not over-compressed. A quick inspection can save you years of headaches down the road.

Why Homeowners in Buda Trust Coach Roofing

If all this sounds like a lot to remember, don’t worry—Coach Roofing has you covered.

We’ve helped countless homeowners in Buda, TX install perfectly secure metal roofs that stand the test of time. Our expert team knows exactly where to put screws, how to prevent leaks, and how to make sure your roof lasts for decades.

Whether you’re planning a DIY project or want a professional installation, Coach Roofing is here to help. We’re proud to be Buda’s go-to roofing experts, offering high-quality craftsmanship and exceptional customer service.

Key Takeaways

• Screw placement matters! Get it wrong, and you risk leaks, wind damage, and premature roof failure.
• Flat vs. rib placement depends on your climate and manufacturer recommendations.
• Screw spacing, screw type, and tightening technique all affect roof longevity.
  Thermal expansion is real—plan accordingly!
• Coach Roofing offers expert installation for homeowners in Buda, TX.

Ready for a Secure, Leak-Free Metal Roof?

Your roof is too important to leave to guesswork. Whether you need a new installation or want an expert opinion on your current roof, Coach Roofing is here to help.

• Get a free consultation from our Buda roofing experts
• Ensure your roof is installed with precision
• Protect your home with expert craftsmanship

Don’t take chances with your roof. Contact Coach Roofing today and let’s get your home covered—the right way!

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