Metal Roofing in Cedar, Minnesota — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—aluminum's non-porous structure means water cannot penetrate and expand when it freezes. Cedar experiences about 83 freeze-thaw days per year in this region, which causes asphalt to crack and wood shingles to split and curl. Aluminum oxide naturally heals micro-scratches, so the material doesn't degrade through repeated expansion and contraction. The Alunar 70% PVDF coating is warranted 30 years against the chalking and fading that frost cycles cause in inferior finishes. Your roof stays intact where others fail.

The four-way interlocking panel design distributes snow weight evenly across the roof deck while the lightweight material (Cedar Shingle profile at 0.41 lb per square foot) eliminates structural strain during Cedar's average 92 cm annual snowfall. Smooth aluminum surfaces allow snow to slide naturally, reducing ice-dam buildup that traps meltwater. The profile options—Slate, Cedar Shingle, Shake—all shed moisture the same way: water flows over the interlock seams without pooling. If you want to prevent snow sliding onto walkways, snow guards install easily into the panel system without penetrating the roof.

Aluminum cannot rust because it contains no iron. Unlike steel roofing, which oxidizes into flaking iron oxide, aluminum forms a thin, self-healing oxide layer that protects the metal underneath. Cedar receives about 778 mm of rainfall annually plus snowmelt, but water cannot corrode aluminum. The Alunar coating (70% PVDF fluorocarbon, applied to both sides) adds an extra 30-year warranty against environmental attack. Steel roofs eventually perforate and leak; aluminum roofs stay sound for decades in wet climates because the material itself is corrosion-proof.

Most Cedar homes need no structural work. The Mediterranean Tile profile installs at roughly 0.59 lb per square foot—about 96% lighter than real tile or slate. Even the heavier Shake profile weighs only 0.58 lb per square foot. Interlock installs directly over your existing asphalt shingles in most cases, meaning no tear-off, no debris, and no delay. The ICC-ES evaluation report ESR-1790 confirms installation over solid decking. Because aluminum is so light, the load on your rafters actually decreases compared to traditional tile, so you avoid expensive reinforcement that other roofing options would require.

Yes. The four-way interlocking panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. Cedar experiences typical daily-maximum winds around 18 km/h with gusts to 100 km/h—well within the roof's rated capacity. The mechanical interlock between adjacent panels distributes wind load across the entire roof system rather than relying on fasteners alone. Even in severe weather, the panels lock together and move as one unit. This design is why Interlock roofs have been installed from coastal salt-air homes to Antarctic research stations without wind-related failures.

Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. Class 4 is achieved by very few roofing products. Because metal roofs demonstrate proven impact resistance and durability, many insurers offer discounts on homeowner policies. Call your agent with the UL 2218 Class 4 specification and ask about a reduction; the premium savings over the roof's 50-year transfer warranty often offset the installation cost. In Cedar's climate, hail protection is genuine peace of mind.

Aluminum requires virtually no maintenance. Asphalt shingles need regular inspection, moss removal (especially in wet climates like Cedar's 778 mm annual rain), and periodic repairs as they age. Cedar shake splits and curls, requiring costly replacement of individual shingles and professional wood treatment. Interlock aluminum never needs sealing, painting, or treatment. Gutters should be cleared of debris as always, but the roof itself is self-maintaining. The Alunar coating is also CALGreen-verified for reduced maintenance burden. Over a 50-year lifespan, the labor savings alone justify the material choice.

Upfront, yes—but over the roof's life, aluminum costs less. Asphalt typically lasts 15–20 years in Cedar's 83 annual freeze-thaw days and 92 cm snowfall; you'll replace it 2–3 times before aluminum needs replacement. The Guardian lifetime limited warranty covers the original owner indefinitely and transfers once to the next owner for 50 years from completion—no prorated deductibles. Asphalt requires roof-to-landfill replacement cycles; Interlock ends that waste. When you add labor for tear-off, disposal, and repeated installations over decades, aluminum becomes the lower-cost choice. This is your last roof.

The Guardian warranty is a lifetime limited, non-prorated material warranty for the original owner covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It transfers once to the next owner for 50 years from completion—rare in roofing. The Alunar coating is separately warranted 30 years against chalking and fading per ASTM standards. Because aluminum cannot rust and the four-way interlocking design sheds snow and ice in Cedar's climate (92 cm annually), the physical roof lasts 50+ years with zero deterioration. The combination of material durability and transferable warranty makes resale simpler: you hand the new owner a 50-year protection promise.

energy-efficient Interlock colors reflect solar heat rather than absorbing it like dark asphalt. The reflectance reaches up to 0.55 (in Aged Copper Penny) with thermal emissivity of 0.84, rated by the Cool Roof Rating Council. Cedar receives about 3113 sunshine hours annually; during warmer months, that reflective property reduces attic temperature and cooling load. You won't overheat in Minnesota summers, but the reflectivity extends your air-conditioning efficiency and reduces peak demand. Unlike asphalt, which converts sunlight to heat and transfers it into your home, aluminum bounces it away. Over decades of use in this climate, the energy savings compound.