Shingle-Free and Fact-Full: Debunking the Top 6 Myths of Metal Roofing in Tucson
Tucson is beautiful, but our desert climate is undeniably harsh. Between intense diurnal temperature swings that can exceed 40°F, blazing summer roof surface temperatures topping 160°F, and the violent wind and rain of the summer monsoon, our home envelopes are put to the ultimate test.
To survive these conditions, more and more Tucson homeowners and builders are making the switch from traditional asphalt shingles to high-performance metal building systems. Yet, despite the explosive growth of metal construction in Southern Arizona, several outdated rumors still circulate.
At Thunder Mountain Metal Sales, we believe in setting the record straight. Here is the metallurgical truth behind the top six myths about metal roofs, proving why they are the absolute best defense for your Tucson home.
Myth 1: “Metal roofs are too expensive.”
The Truth: When looking at the total cost of ownership, metal is actually the most economical choice you can make.
First, let’s talk upfront cost: our 29-Gauge AG Panel is an exceptionally affordable option that typically costs less than standard asphalt shingles. Second, think about longevity. Standard asphalt shingles undergo rapid photochemical degradation under the Tucson sun and require replacement every 15 to 20 years. A premium metal roof, however, is a “once-and-done” investment designed to last 40 to 60 years—easily two to three times the lifespan of asphalt.
When you factor in that a quality metal roof can retain up to 95% of its cost at resale, qualify you for up to 35% off your homeowner’s insurance premiums, and slash your summer cooling bills by up to 40%, a metal roof doesn’t cost money—it saves money.
Myth 2: “Metal roofs attract lightning.”
The Truth: This is a classic misconception. Lightning is attracted to the highest point in a given area, completely regardless of what material that point is made of.
A metal roof does not increase your home’s likelihood of being struck by lightning whatsoever. In fact, it has the exact same chance of a strike as an asphalt shingle, wood, slate, or clay tile roof. Furthermore, because steel is a non-combustible material with a UL 790 Class A Fire Rating (the highest safety rating available), if your home ever were hit by a strike, a metal roof would safely disperse the electrical charge without catching fire, unlike wood or asphalt.
Myth 3: “Metal roofs dent too easily.”
The Truth: You don’t have to worry about hail, falling branches, or walking on your roof.
Our metal panels are forged from heavy-duty, high-tensile AZ50 Galvalume® Grade 80 steel. The “Grade 80” specification means the steel boasts a minimum yield strength of 80,000 psi, providing immense structural rigidity to resist wind deformation and physical impacts.
Both our AG and PBR panels carry a UL 2218 Class 4 Impact Resistance rating. This is the highest level of hail protection available, tested by dropping steel balls directly onto the panels. Furthermore, as long as you have a solid roof deck, you can safely walk on your metal panels for routine maintenance without any fear of causing structural damage or denting.
Myth 4: “Metal roofs rust easily.”
The Truth: While old corrugated tin barns from a century ago might have rusted, modern metal roofing technology has evolved dramatically.
At Thunder Mountain Metal Sales, our steel is coated with AZ50 Galvalume®—a premium alloy composed of 55% aluminum, 43.4% zinc, and 1.6% silicon by weight. The aluminum forms an impenetrable barrier against atmospheric oxidation, while the zinc provides sacrificial “galvanic” protection to heal scratches and raw cut edges over time.
On top of this high-tech substrate, our painted lines feature Sherwin-Williams SMP WeatherXL™ coatings. This industry-leading paint system is highly resistant to South Florida-style UV weathering, cracking, and chalking. It is so reliable that we back our AG panels with a 40-year paint warranty and our PBR panels with a Limited Lifetime paint warranty against peeling, cracking, or fading.
Myth 5: “Metal roofs are loud when it rains.”
The Truth: When you hear rain drumming on a metal roof, you are likely remembering a visit to an old, open-frame agricultural barn.
The difference between an open barn and a residential home is the underlying roof structure. Residential metal roofs are installed over a solid roof deck combined with high-quality underlayment, such as our HydraShell Supreme synthetic underlayment or Roofnado™ synthetic underlayments. This solid deck and underlayment act as an incredibly effective acoustic barrier. As a result, a residential metal roof is no more or less noisy during a monsoon downpour than any other traditional roofing material, like asphalt or tile.
Myth 6: “Metal roofs make your house hotter.”
The Truth: In reality, the exact opposite is true: metal is one of the most energy-efficient roofing materials you can install.
While all roofs absorb heat under the sun, asphalt shingles act like dense thermal sponges, trapping heat and radiating it down into your attic long after the sun has set. Metal, conversely, releases absorbed solar heat much faster.
More importantly, our Sherwin-Williams WeatherXL™ coatings are formulated with Solar Reflective (SR) pigments. These “Cool Roof” color options (such as Sahara Tan or Polar White) are designed to actively reflect the sun’s radiant heat back into the atmosphere rather than absorbing it. According to the Heat Island Group of Lawrence Berkeley National Laboratory, reflective metal roofs can reduce your summer cooling energy needs by up to 40%, keeping your home comfortable and your energy bills low.
Upgrade to Desert-Proven Defense
Don’t let outdated myths keep you from securing the most durable, eco-friendly, and cost-effective roof on the market. Sourced from 100% American-made steel, our custom panels are fabricated locally in Tucson and cut to the whole inch to eliminate on-site waste and lower your project costs.
Stop by our newly expanded facility at 5540 S Beverly Ave to inspect our color options, feel the strength of Grade 80 steel, or talk to our experts about a free project estimate!
🎨 I can compile a complete Color Selection Guide for our Sherwin-Williams SMP WeatherXL™ colors—complete with their specific Solar Reflective Index (SRI) ratings—to help you find the perfect “Cool Roof” hue for your home.
