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What to Know About Roofing Code Requirements Before Replacing Your Commercial Roof

If you’re planning a commercial roof replacement, you’ve likely heard terms like building code compliance, energy code requirements, or manufacturer specifications thrown around. And let’s be honest—those can sound like intimidating roadblocks when all you want is a quality roof that protects your investment. 

At Weather Shield Roofing Systems™, we’ve been helping commercial property owners, managers, and investors navigate these very concerns for over 40 years. We know this part of the process can feel overwhelming. But don’t worry—we’re here to break it down clearly and simply, so you can feel confident moving forward. 

Why Do Building Code, Energy Code, and Manufacturer Requirements Matter? 

When you’re designing or replacing a commercial roofing system, three key “gatekeepers” must be satisfied: 

• Local Building Codes – These regulations help ensure structural safety. 
• Energy Codes – These focus on improving the thermal performance (like required R-values) of your building. 
• Manufacturer Requirements – These standards must be met to qualify for a roof system warranty. 

You might think of these three as different voices in a conversation about your roof—but thankfully, they usually want the same thing: a safe, efficient, and long-lasting roofing system. 

How Roofing Professionals Handle Code Requirements

When we assess a roof for potential replacement or design changes, our team always starts with due diligence. That includes thoroughly researching: 

• Local building code regulations
• Applicable energy efficiency standards
• Manufacturer installation guidelines 

This isn’t just paperwork—these elements determine everything from the number of roofing layers allowed, to how much insulation (or “R-value”) is required, to how the roof must be installed and inspected for warranty eligibility. 

Real-World Example: Avoiding Costly Mistakes 

Back in 2017, a roofing project in Michigan ran into serious trouble. The energy code in that area had recently changed, and the contractor didn’t follow the updated requirements. The building inspector caught the error after most of the roof was installed—no permit had been pulled, and no R-value upgrades were made. 

The result? The contractor and owner ended up in court, and significant parts of the roof had to be redone. That’s a nightmare scenario—and exactly what we work to prevent. 

So, What Should You Be Asking as a Building Owner or Manager? 

You don’t need to become a code expert. That’s what professionals like us are for. But you should be informed and involved enough to ask the right questions at the beginning of your roofing project. Here are a few tips: 

Start with a conversation. Ask your roofing partner: “Will this new roof meet local building code and energy code requirements?” 

Confirm your insulation needs. The energy code may require your new roof to increase thermal performance. Don’t assume your existing insulation is enough. 

Don’t skip the warranty talk. Ask, “Are we designing this to meet manufacturer specs so I can get a 15-, 20-, or 30-year warranty?” 

If you get blank stares—or worse, vague answers—that’s a red flag. A reputable commercial roofing contractor will already have this on their checklist. 

What Happens If Requirements Aren’t Met?

If you miss one of these three checkpoints, things can go wrong quickly: 

Building Code Violations – You could be forced to tear off and redo parts of the roof, even if it’s nearly finished. 

Energy Code Noncompliance – Your building might not pass inspection or qualify for occupancy. 

Manufacturer Denies Warranty – If installation guidelines aren’t followed, your roof may not be covered under warranty—even if it fails early. 

This is why we often consult directly with local building or energy code officials if there’s any gray area. We’d rather confirm early than risk expensive delays or rework later. 

The Good News: These Requirements Often Align

In most cases, building codes, energy codes, and manufacturer specifications aren’t at odds. They generally support one another in encouraging: 

• Better roof performance
• Increased energy savings
• Safer, longer-lasting buildings 

That said, the devil is in the details. Understanding how all three interact—and where compromises can be made without sacrificing compliance—is something that only comes with experience. 

Partner With a Contractor Who Knows the Landscape

At Weather Shield Roofing Systems, we’ve spent decades learning the ins and outs of roofing codes across Michigan and beyond. We’ve seen firsthand how a well-designed commercial roofing system can improve energy efficiency, lower maintenance costs, and increase the long-term value of your property. 

More importantly, we take responsibility for making sure every new roof we install meets the necessary codes and earns a full manufacturer’s warranty—so you’re protected from day one. 

If you’re planning a commercial re-roof or want to explore your options, give us a call. We’re happy to walk you through your specific situation and ensure you’re on solid ground—before a single shingle or membrane goes down.