How to Install Metal Roofing: A DFW Cost & Step-by-Step Guide

Metal roofing installation in North Texas isn't a weekend DIY job — it's a system of fastening patterns, flashing details, and underlayment choices that have to hold up against hail, 100°F summers, and wind gusts that top 60 mph during a spring line of storms. At Wortham Brothers Roofing, we've mastered install metal roofing across McKinney, Frisco, Plano, and the greater Dallas metro since 1986, and the projects that fail early almost always trace back to the same two things: wrong fastener spacing for the panel profile, and flashing that wasn't built for our clay soil's foundation movement.

For a typical 2,000–2,500 sq ft North Texas home, a professionally installed standing-seam or Class 4 impact-resistant metal roof runs $12,000–$22,000 installed, with material-only DIY kits starting closer to $8,000 — before accounting for tear-off, decking repair, or code-required ice-and-water shield at eaves and valleys. Installation typically takes 2–4 days for a licensed crew, versus 1–2 weekends of trial-and-error for most homeowners tackling it solo.

Below, we walk through the exact steps our Account Managers and install metal roofing crews follow on every job — what tools you actually need, how to prep the deck correctly, and whether you can install over existing shingles (spoiler: it depends on your local building code and existing roof condition). If you'd rather skip the ladder time altogether, WBR offers free inspections and can usually quote your project same-week: 817-ROOFING.

Pre-Installation Prep Work:

Installing a metal roof could be a great way to save money and get a long-lasting, durable roof. But it’s not a project to take lightly. There are some important safety considerations to keep in mind before you start on the roof.

First things first, make sure you have the right safety gear. You’ll need safety goggles to shield your eyes from flying debris and a safety harness to keep you from taking a tumble off the edge. Don’t forget sturdy shoes with good traction, too.

Next, pay attention to the weather. You don’t want to be up on that roof in the middle of a thunderstorm or when there are rain possibilities. Plan ahead and choose a stretch of clear, dry days to tackle this project.

Before you start, take a look around for any obstacles or hazards. Are there any low-hanging tree branches that could get in your way? What electrical wires do you need to avoid? Take care of those before you start so you can focus on the task at hand.

Installing A Metal Roof Step-By-Step 

Now that you’ve addressed safety, it’s time to gather your tools and materials. Some key tools you’ll want to have on hand are:

• Tin snips for cutting the metal panels to size. 
• A drill or screw gun for attaching the panels.
• A chalk line for keeping everything straight and even.
• Roofing nails or roofing screws to secure the panels in place. 
• Silicone sealant to make sure everything is watertight.
• A measuring tape and straight edge.

Now, let’s walk through the step-by-step process of installing metal roofing.

Step 1. Measure your roof. 

First, you need to know how much material you need. Measure both the length and width of every section of your roof and calculate the square footage. Add a little extra for overlap and waste.

Before you start putting on the new roof, make sure the deck underneath is in good shape. Replace any damaged plywood or boards. If you’re installing over an existing asphalt roof, you can usually leave it in place as long as it’s not too damaged or uneven.

Step 2. Lay down a moisture barrier.

Next, you’ll want to lay down a moisture barrier. This is usually a special underlayment designed for metal roofs. It helps protect against leaks and condensation. Along the edges of the roof, you’ll install drip edges and closure strips. These help direct water away and into the gutters. They also provide a nice finished look.

Step 3. Cutting the metal roofing 

Cutting and fitting the metal roofing panels is probably the trickiest part of the job. Here are a few tips to make it easier. 

Measure twice and cut once. Use your chalk line to mark where each panel needs to be cut. Remember to account for overlap and leave a little wiggle room. For straight cuts, a pair of tin snips or a sheet metal tool will do the trick. For more complex cuts, you might need a circular saw or nibbler.

When you’re cutting panels, try to keep the edges as straight and clean as possible. This will make it easier to overlap and seal the panels for a watertight fit. If needed, you can use a file or grinder to smooth down any rough spots.

Step 4. Laying the metal panels

Now for the main event, — putting on the metal panels. Start at the eave and work your way up, overlapping each panel as you go. Make sure to follow the manufacturer’s instructions for proper spacing and fastening.

Step 5. Finish up

To finish the job and ensure a watertight seal, you’ll install a ridge cap along the peak of the roof. This cap covers the gap where the two sides meet and provides a polished look. A metal roof is great at shedding water but still needs proper ventilation and drainage to prevent moisture buildup and leaks. Here’s what you need to know.

The ridge cap does more than just make the roof look nice. It also allows hot air to escape from the attic, preventing condensation and heat buildup. Make sure it’s properly vented and sealed.

Closure strips go under the metal panels along the eaves and gables. 

They help prevent wind-driven rain and pests from getting under the panels while still allowing air to circulate. Drip edges along the eave help direct water into the gutters and away from the fascia. Make sure they’re securely fastened and sealed to prevent leaks.

What Is A Common Mistake When Installing Metal Roofing?

One of the most common mistakes is not using enough fasteners or not spacing them correctly. This can lead to loose panels and leaks. Always follow the manufacturer’s guidelines for fastening.

If you’re installing over an existing asphalt shingle roof, make sure to repair any damage or unevenness first. Otherwise, you’ll just be putting a band-aid on a bigger problem.

Don’t be tempted to skip the moisture barrier or water shield. It might save you a little time and money upfront, but it will likely lead to leaks and roof damage down the road.

Should You Call in a Professional Roofer?

While it’s definitely possible to install a metal roof yourself if you’re a seasoned DIY pro, you really should call in experienced roofers.

This is especially true if your roof has many valleys, dormers, or other complex features, it might be more than a DIY job can handle. A professional will have the experience and tools to get the job done right. 

Depending on where you live, there may be specific building codes and requirements for metal roofing installation. A licensed contractor will know how to navigate these regulations and make sure your roof is up to code. If your roof has a steep slope, it is dangerous to work on without the proper safety equipment and training. In these cases, it’s best to leave it to the professionals.

Final Thoughts: How to Install Metal Roofing 

The process of installing a metal roof promises longevity and significantly enhances your home’s aesthetics. Whether you’re a seasoned pro at home improvements taking on this task head-on or a homeowner curious about what goes into a roofing contractor placing a metal roof, we hope we were able to provide you with some guidance and insight today. Want to install metal roofing? Allow our Wortham Brothers Roofing team of roofers to help you out.