How to Attach Metal Roof Panels: The Step-by-Step Guide

If you're looking to install a new metal roof, the first step is knowing how to attach the panels. There are two main ways to do this: exposed fastener and concealed fastener systems. In this blog post, we'll go over the steps for both types of systems, so you can choose the best one for your needs. We'll also discuss the importance of tightening the screws correctly and show you how to do it the right way. Plus, we'll tell you what tools you need to get the job done!
Building Code and Safety Standards to Know
Modern installations must comply with current IRC (International Residential Code) and IBC (International Building Code) requirements. Here’s what to keep in mind:
- Wind Uplift Requirements: Panel fastening patterns and clip spacing must meet regional uplift resistance per ASCE 7-22.
- Seismic Design Considerations: In earthquake-prone areas, fastening systems may require flexible connections that accommodate movement.
- Thermal Movement Compliance: Code updates emphasize allowing for panel expansion and contraction to prevent buckling and warping.
- OSHA Safety Guidelines: All roofing work must comply with fall protection rules, ladder safety, and personal protective equipment (PPE) regulations updated in the 2023 OSHA guidance.
Always verify your project meets local building code adaptations.
What's the Difference Between an Exposed and Concealed Fastener System?
Before you begin installation, it’s important to choose the right fastener system for your project.
Exposed fasteners are easier to install and are commonly used on agricultural, industrial, and budget-conscious projects. The screws are visible after installation. This system is ideal for DIYers or contractors who need a fast, cost-effective install.
You'll need the following basic tools to install an exposed fastener system:
Step-by-Step Process:
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Concealed Fastener System:
A concealed fastener system is a bit more difficult to install, but it has a cleaner finish and offers better weather protection. This requires more time and skill to install. Each has its place depending on the building type, budget, climate zone, and aesthetic preferences.
You'll need the following tools to install a concealed fastener system:
Step-by-Step Process:
Advanced Weatherproofing and Long-Term Performance
As climate conditions become more unpredictable, long-term durability starts with superior sealing practices:
- Use butyl tape and high-performance sealants at panel seams, flashing joints, and roof penetrations
- Choose gaskets and screws with UV resistance and 20+ year service life
- Apply tape or sealant in dry conditions at temperatures within the manufacturer’s recommended range
Proper installation isn’t just about strength, it’s about preventing future callbacks, leaks, and warranty issues.
Don’t Forget Expansion & Contraction
Metal expands and contracts with temperature shifts. If not accounted for, this can warp panels, damage fasteners, or even pull systems apart.
Best Practices:
- Use floating clips or slotted fastener holes for long panels
- Avoid over tightening fasteners—leave enough movement range
- Use thermal breaks or isolators in areas with wide temperature swings
- Refer to panel specs for exact expansion coefficients and joint spacing
Wrap-Up
Whether you're installing a basic agricultural roof or a sleek architectural system, proper fastener technique, code compliance, and modern tools make all the difference.
AMSI Supply offers a full range of exposed and concealed fasteners, sealants, tools, and accessories for professional metal roofing installers.
Contact us to learn more, or shop now for your next project.