Metal roofing is a popular choice for both residential and commercial properties due to its durability, energy efficiency, and modern look.

However, the installation process can be tricky, especially when it comes to cutting the metal sheets to fit specific dimensions and shapes. In this guide, we will walk you through everything you need to know about how to cut metal roofing, including:

  • The tools you’ll need
  • Step-by-step instructions
  • Safety tips

Understanding Metal Roofing

Before we get into the cutting process, it’s essential to understand what metal roofing entails. Metal roofing materials usually come in sheets or panels and are made from various metals, including steel, aluminum, copper, and zinc. Each type of metal has its own benefits and cutting considerations:

  • Steel Roofing: Often coated with a protective layer of zinc (galvanized) or a mixture of aluminum and zinc (Galvalume), steel is strong and less prone to rust.
  • Aluminum Roofing: Lightweight and resistant to rust, making it ideal for coastal areas.
  • Copper Roofing: Offers an aesthetic appeal with its natural patina over time but can be more expensive.
  • Zinc Roofing: Known for its self-healing properties and long lifespan.

With this knowledge, you can choose the right metal for your project and understand how different metals might affect the cutting process.

Tools You Will Need

snippers metal roofing

Cutting metal roofing requires specific tools to ensure clean cuts and proper installation. Here’s a list of essential tools:

Must-Have Tools

  • Tin Snips: Ideal for making small cuts or cutting around obstacles. Available in straight-cut, left-cut, and right-cut designs.
  • Metal Shears: Electric or pneumatic shears can speed up the process and make longer cuts more manageable.
  • Nibblers: These tools cut small, circular pieces out of the metal, allowing for precise and intricate cuts without warping the material.
  • Circular Saw with Metal Cutting Blade: Suitable for straight cuts on thicker metal. Ensure you use a blade specifically designed for metal.
  • Chalk Line: To mark straight lines on the metal sheets where cuts will be made.
  • Measuring Tape: For precise measurements to ensure accuracy.
  • Safety Gear: Including gloves, goggles, and ear protection to prevent injuries.

Optional Tools

  • Angle Grinder: Can be used for cutting and finishing edges.
  • Drill: To make holes for fasteners if necessary.
  • Clamps: To hold the metal sheet in place while cutting.

Preparing for the Cut

Preparation is key to achieving precise cuts in metal roofing. Follow these steps to set up your working area:

  • Choose a Safe Workspace: Ensure you have a flat, stable surface to work on, and clear the area of any debris that could interfere with cutting.
  • Set Up Your Tools: Gather your tools and safety gear, making sure everything is in working order.
  • Measure and Mark the Metal: Use your measuring tape and chalk line to mark the cut lines on the metal sheet. Double-check measurements to avoid errors.
  • Secure the Metal Sheet: Use clamps to hold the metal sheet firmly in place, preventing it from moving during cutting.

4 Step Instructions for Cutting Metal Roofing

green metal cutting

Cut metal roofing perfectly every time, by following these steps.

1. Cutting with Tin Snips

Best for: Small cuts, curves, and detailed work.

  • Select the Right Snip: Use straight-cut snips for straight lines, left-cut snips for counter-clockwise curves, and right-cut snips for clockwise curves.
  • Position the Snip: Start at the edge of the metal sheet, aligning the snip blades with the marked line.
  • Make the Cut: Apply steady pressure and work slowly along the line, ensuring the snips are cutting cleanly through the metal. Use your free hand to support the sheet and guide the snips.

2. Cutting with Metal Shears

Best for: Long, straight cuts.

  • Align the Shears: Position the shears at the beginning of the marked line.
  • Start Cutting: Turn on the shears and guide them along the line, keeping them aligned for a straight cut.
  • Maintain Pressure: Keep consistent pressure to avoid jagged edges.

3. Cutting with a Nibbler

Best for: Intricate cuts and corners.

  • Setup the Nibbler: Attach the nibbler to a power source if needed and ensure the cutting head is sharp.
  • Begin Cutting: Position the nibbler at the start of the line and slowly guide it through the metal, following the marked path.
  • Remove Debris: Clear away the small metal pieces as you cut to maintain a clean line of sight.

4. Cutting with a Circular Saw

Best for: Thick metal and straight cuts.

  • Select the Blade: Use a metal cutting blade and attach it to your circular saw.
  • Secure the Metal: Ensure the sheet is clamped down securely to prevent shifting.
  • Adjust the Saw Depth: Set the blade depth so it’s just slightly deeper than the thickness of the metal sheet.
  • Cut Carefully: Start the saw and guide it along the marked line with steady, controlled pressure.

Safety Tips

Working with metal roofing involves risks, so always prioritize safety:

  • Wear Protective Gear: Use gloves, goggles, and ear protection to prevent injuries from sharp edges, flying metal pieces, and loud noises.
  • Work in a Well-Ventilated Area: Cutting metal can produce fumes and dust, so ensure your workspace has proper ventilation.
  • Keep Fingers Clear: Always be aware of the blade’s path and keep hands away from cutting areas.
  • Inspect Tools Regularly: Check tools for wear and damage before use to prevent accidents.

Finishing Touches and Installation

After cutting your metal roofing, follow these steps to complete the installation:

  • Deburr the Edges: Use a file or angle grinder to smooth any sharp edges created during cutting.
  • Check Fit and Adjust: Dry-fit the panels to ensure they align correctly and make any additional cuts if necessary.
  • Install the Panels: Secure the metal panels onto the roof structure using appropriate fasteners. Follow installation guidelines for the specific metal type.
  • Seal Joints and Edges: Apply a sealant to seams and joints to prevent water infiltration.

We’ll Install Your Metal Roofing Panels

cutting metal shingles

Cutting metal roofing may seem daunting, but with the right tools, preparation, and technique, you can achieve professional results. Whether you’re a DIY enthusiast or a professional roofer, this guide provides the knowledge and steps needed to cut and install metal roofing effectively.

Remember, taking the time to measure accurately and cut carefully will save time and prevent costly mistakes during installation. Now that you’re equipped with this comprehensive guide, you’re ready to start your metal roofing project.

For those who want to ensure flawless execution, choose Young Construction to get personalized advice and ensure a successful installation. Happy roofing!

company icon