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

Aluminum's smooth surface sheds snow and ice far more effectively than asphalt shingles, and the four-way interlocking panels lock together so tightly that snow slides cleanly without pooling. With about 120 cm of snow per year and roughly 83 freeze-thaw days, the real risk is ice damming on asphalt—thermal cycling causes shingles to crack and allow water under the roof. Interlock's non-porous aluminum oxide layer doesn't absorb moisture, so freeze-thaw cycles can't degrade the material itself. Optional snow guards prevent dangerous slides if you want them.

Steel contains iron, which oxidizes (rusts) when exposed to moisture and oxygen—a process that never stops. Aluminum has no iron in it; instead, it forms a microscopically thin oxide layer that naturally seals the metal underneath. If that layer is scratched, it heals itself automatically when exposed to air. Interlock uses roofing-grade 3105-H24 aluminum coated on both sides with Alunar 70% PVDF fluorocarbon finish, warranted 30 years against chalking and fading. This two-sided protection matters in Ham Lake's 778 mm annual rainfall, where moisture is constant.

No. Freeze-thaw damage occurs in porous materials—asphalt, wood, concrete—because water penetrates, freezes, expands, and splits the material from inside. Aluminum is non-porous; water sits on the surface and drains away. With 83 freeze-thaw days per year in Ham Lake, asphalt shingles gradually crack and curl as the cycling stress compounds year after year. Interlock's aluminum panels expand and contract uniformly without cracking. The sealed four-way interlocking seams prevent water from entering the system even during rapid temperature swings, so freeze-thaw cycling actually has no degrading effect on the roof itself.

Interlock panels are warranted to resist wind speeds up to 120 mph when installed to specification, and Ham Lake's typical gusts reach about 100 km/h (62 mph), well below that threshold. The panels interlock four ways—side-to-side and top-to-bottom—creating a unified system, not individual shingles that can peel back. Heavy wind loads actually benefit from metal's light weight; the 0.41 lb/sq ft Shingle profile reduces structural stress compared to asphalt, so the fastening system works with less strain. Ice-laden snow and wind together are what stress asphalt roofs; aluminum's slick surface won't hold that combination the way shingles do.

Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty covers perforation from hailstones up to 1.5 inches. Class 4 means the roof has passed UL's rigorous drop-ball test and shown no cracking, splitting, or loss of impact resistance. Many homeowners' insurers offer premium discounts for Class 4-rated roofs because claims are rare. In Minnesota's hail-prone areas, that savings often offsets some of the material cost. Contact your insurer with the product specs; they can confirm eligibility before installation.

Interlock costs more upfront than asphalt but far less over the roof's life. Asphalt lasts 15–25 years, then you tear off, landfill 10 tons of waste, and buy again. Interlock carries a non-prorated lifetime limited warranty for the original owner and is transferable (50 years to the next owner), effectively a single-purchase roof. At roughly 3113 sunshine hours per year and 778 mm rainfall, Ham Lake's weather accelerates asphalt degradation. By year 30–40, most homeowners have re-roofed twice; an Interlock roof may never need replacement. That one-purchase permanence—plus no re-roofing labor, no landfill debris—makes the lifecycle cost substantially lower, even with a higher initial investment.

The Guardian Warranty is non-prorated for the original owner and covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance—the main failure modes of roofing materials. Non-prorated means no deductible or percentage-paid schedule; Interlock stands behind the roof for as long as you own it. When you sell, the next owner gets a 50-year transferable coverage from completion. This transferability is rare and adds real value; it signals durability to buyers. Given that asphalt roofs fail around 20 years in climates like Ham Lake's, the lifetime term essentially means the roof outlasts typical ownership and adds curb appeal at resale.

Aluminum requires virtually no maintenance—no re-sealing, no algae treatment, no moss scraping. Asphalt needs annual gutter cleaning and shingle inspections; wood shakes need fungicide spraying and individual shake replacement; clay or concrete tile requires specialist mortar repair and cracked-tile replacement. Interlock's smooth, non-porous surface sheds debris automatically, and the 30-year Alunar PVDF coating doesn't degrade like asphalt's sun-exposed binder. In Ham Lake's wet climate (778 mm rain, 92 cm snow), that self-maintaining finish is a real time-saver. The only routine task is keeping gutters clear—same as any roof—but the substrate itself stays factory-perfect for decades.

Interlock's energy-efficient colors reflect solar heat rather than absorb it. Aged Copper Penny achieves initial solar reflectance up to 0.55 and thermal emissivity of 0.84, meaning it bounces heat away and releases absorbed heat quickly. Over a summer, this measurably lowers cooling loads compared to dark asphalt (which absorbs ~90% of solar energy and heats attic air). Cool Roof Rating Council ratings back this difference. While Ham Lake's mean temperature is cool (7.8°C), longer spring and fall seasons still bring heat-gain days. The reflective finish also works in winter—emissivity 0.84 means the roof radiates stored daytime heat safely at night, reducing ice-dam risk. Energy performance is a year-round benefit, not just summer savings.

Yes. Interlock's light weight—the Slate at about 0.41 lb/sq ft—allows installation over most existing roofs without structural reinforcement. Your current asphalt becomes a moisture barrier and underlayment, eliminating a tear-off and landfill cycle. A typical installation takes 2–5 days depending on roof complexity; the four-way interlocking panels lock together quickly, so labor is faster than traditional shingling. Interlock Metal Roofing has served the region since 2001 and handles this process routinely. The only reason to tear off is if the existing deck is rotten or severely damaged. In most cases, overs-install saves 30–40% of labor and disposal cost while keeping old material out of the waste stream.

Yes. Ham Lake averages about 92 cm of snow, 778 mm of rain, roughly 83 freeze–thaw days a year, with peak wind gusts near 100 km/h. Interlock® aluminum roofing is wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated and Class A fire-rated, and its four-way interlocking panels shed snow and resist ice dams and freeze–thaw cracking — all backed by a lifetime limited, transferable warranty.