What are building codes and why do they matter?

Building codes are legally enforceable regulations that set minimum standards for the design, materials and construction of buildings, covering everything from structural integrity to fire safety to roofing requirements. The two main model codes in the US are the IRC (International Residential Code), which applies to residential buildings, and the IBC (International Building Code), which applies to commercial structures. All 50 states have adopted one or both at the state or jurisdiction level, though the specific version and any local amendments vary by address. For roofers and adjusters, codes determine what a compliant repair requires and what belongs in an estimate.

How often do building codes change and why?

Model codes are typically updated every three years by the International Code Council, though individual jurisdictions choose when and whether to adopt each new edition. Adoption often lags the release date by years, which means the code in effect in one county may be two or three editions older than in a neighbouring county. Updates are driven by advances in materials and technology, lessons from natural disasters and shifts in energy efficiency requirements. That lag and variation between jurisdictions is one of the main reasons jurisdiction-level code lookup is more reliable than relying on state or city-level information.

Why do building code requirements vary from one street to the next?

Because codes are adopted and enforced at the jurisdiction level, not the state or city level. A property's governing authority depends on whether it falls within a city boundary, a county boundary or some other special jurisdiction, and those lines do not follow postal addresses. Two properties on opposite sides of the same street can be governed by different authorities that have adopted different code versions with different local amendments. That difference can change ice and water shield requirements, ventilation calculations, permit fees and more.

How do I determine which code version applies to a specific property address?

You need to identify the Authority Having Jurisdiction, whether that is the city, county or state, and confirm which code version they have adopted and what local amendments are in effect. A postal address alone is not sufficient since jurisdictional boundaries frequently do not follow ZIP code lines.

Why isn't it enough to just say "the state uses IBC/IRC XXXX"?

Because many jurisdictions adopt the model code but then add local amendments and some have entirely separate local ordinances. The exact requirements can vary by address, which means a state-level answer is often not specific enough to rely on when writing an estimate or pulling a permit.

What tools make finding local building codes faster and more reliable?

Platforms that accept a property address and return the jurisdiction, adopted code version, local amendments and permit requirements eliminate the manual process of calling building departments and searching PDF archives. OneClick Code does this automatically for any U.S. address.

What are the most common mistakes when researching building codes?

Assuming that all properties in the same ZIP code fall under the same jurisdiction is the most frequent error and can produce a cost or compliance swing of 25% or more. Other common pitfalls include relying on outdated PDFs, skipping local amendment checks and contacting the wrong building department.

How does accurate, address-specific code data benefit contractors and adjusters?

Correct code data means the estimate reflects what the job actually requires, which reduces supplements, speeds permit approval and protects against failed inspections and carrier disputes. For adjusters it means the claim aligns with locally enforceable requirements from the start, cutting cycle time and reducing the likelihood of escalation.

What should I look for when inspecting a roof for hail damage?

Start with the soft metals around the roof since hail impact shows most clearly on gutters, downspouts, vent caps and flashing. On the shingles themselves, look for circular impact points, cracked or fractured tabs and granule loss that exposes the underlying mat. Check ridge caps, which take direct hits. Dents on HVAC equipment and skylights help establish that significant hail reached the property, which strengthens the case that shingle damage is real and not just wear.

How do you prove hail damage on a roof for an insurance claim?

Documentation is everything. Photograph every impact point on soft metals and shingles from multiple angles, note the storm date and match it to hail event records from services like HailTrace. Having both the roofer and the adjuster inspect independently and then align on findings reduces disputes. When both parties use the same technology platform and code data, the scope of covered damage is harder to challenge and claims move faster.

Why do roofers and insurance adjusters sometimes disagree on hail damage?

The incentives point in opposite directions: the contractor is motivated to identify as much damage as possible and the adjuster is working to control the payout. That tension can produce genuinely different interpretations of the same evidence. The most practical way to reduce disputes is to make sure both parties are working from the same technology and the same code reference, so the conversation is about documented facts rather than competing estimates.

Why can't roofing contractors use ZIP codes to determine sales tax?

ZIP codes were created by the USPS to organize mail delivery routes, not to define tax jurisdictions, so they do not align with the geographic boundaries that determine sales tax rates. A single ZIP code can contain multiple overlapping jurisdictions: state, county, city and special tax districts each set their own rate. Properties on the same street can fall under different tax rules, making ZIP-based lookup unreliable and creating a real financial risk on every job.

Do sales tax rates vary within the same ZIP code?

Yes, they can vary significantly. Tax rates are a combination of state, county, city and special district rates, and those boundaries do not follow postal routes. In some ZIP codes across the United States there are as many as four different total tax rates, and the difference between the highest and lowest can exceed one percentage point. For a contractor on a $7,200 job, that variance can mean up to $720 coming out of your margin if you used the wrong rate in your estimate.

How should roofers get accurate sales tax information for their estimates?

The only reliable approach is address-level tax lookup rather than ZIP-based lookup. Tools like OneClick Code give contractors instant access to the correct jurisdiction and sales tax rate for any property address, which also matters for insurance claims where inaccurate tax rates create compliance risks and pricing disputes. Getting this right at the estimate stage protects your margin and avoids awkward conversations with customers after the fact.

Can you do a roof inspection with a drone?

Yes, and for many situations it is a better option than sending someone onto the roof. A drone can capture detailed imagery of the entire roof surface from multiple angles without anyone climbing, which matters especially for steep, damaged or otherwise unsafe roofs. Some drones can be programmed to calculate square footage, record pitch and identify features like valleys and penetrations, producing data that would take a manual inspection significantly longer to gather.

What are the main benefits of using drones for roofing inspections?

Safety is the biggest one: keeping people off roofs that are degraded, steeply pitched, wet or otherwise hazardous. Efficiency is close behind since drones can cover the same ground as a manual inspection in roughly a third of the time. The documentation they produce is also more objective than handwritten notes: images with a time and location stamp that can be stored, shared and reviewed by multiple parties, which is valuable when building or disputing an insurance claim.

Are drones too expensive or too difficult to operate for most roofers?

Neither concern holds up for most businesses. The upfront cost is real but drones pay for themselves quickly through reduced man-hours and improved safety, and they depreciate as a business asset like any other tool. On the learning curve side, professional drones designed for roofing are built for ease of use: most operations come down to button pushes or basic joystick movements rather than manual piloting skill. FAA regulations do apply and vary by area, but OneClick Code includes FAA rules and requirements within its property reports alongside roofing codes, so you have what you need without a separate research step.