Aluminum vs steel gutters is one of the most common questions Minnesota homeowners ask when replacing their gutter system. Both materials are excellent choices, but they differ significantly in weight, cost, durability, and performance characteristics. At Weatherguard Construction, we've installed both aluminum and steel gutter systems across Stillwater, Minneapolis, Woodbury, and the Twin Cities metro for over 25 years. Here's our detailed comparison to help you choose the best material for your home.
Aluminum Gutters: Overview
Aluminum is the most popular gutter material in the United States, and for good reason. Seamless aluminum gutters are custom-formed on-site using a portable gutter machine that creates continuous, joint-free runs from rolls of aluminum coil stock. Standard residential aluminum gutters use .027-inch or .032-inch gauge aluminum.
Advantages of Aluminum Gutters
Corrosion Resistance Aluminum's greatest advantage is its natural resistance to rust and corrosion. Unlike steel, aluminum does not rust even when the painted finish is scratched or chipped. This is a significant advantage in Minnesota, where salt, moisture, and freeze-thaw cycles accelerate corrosion on ferrous metals.
Lightweight Aluminum gutters are significantly lighter than steel, making them easier to handle during installation and placing less stress on fascia boards and mounting hardware. This reduced weight is particularly beneficial for older homes where fascia boards may not support heavier gutter systems.
Wide Color Selection Aluminum gutter coil stock is available in 20–30+ factory colors with baked-on enamel finishes. This broad color selection makes it easy to match virtually any home exterior, as we discussed in our gutter color guide.
Cost-Effective Aluminum gutters cost $6–$12 per linear foot installed for seamless systems — making them the most affordable option for quality seamless gutters. For a typical Minnesota home with 150–200 linear feet, total project costs range from $1,200–$2,400.
Seamless Fabrication Aluminum is the easiest metal to form on a portable gutter machine, making seamless fabrication standard practice. Seamless gutters have fewer leak points and provide cleaner aesthetics than sectional systems.
Disadvantages of Aluminum Gutters
Dent Susceptibility Aluminum is softer than steel and more susceptible to denting from hail, ladder contact, and impact from falling branches. In Minnesota's hail-prone climate, this is a real consideration — though dents in gutters are primarily cosmetic and rarely affect function.
Thermal Expansion Aluminum expands and contracts more than steel with temperature changes. In Minnesota, where temperatures can swing 120+ degrees between summer highs and winter lows, this expansion creates stress on fasteners and mounting hardware. Proper installation techniques account for this movement.
Lower Strength Standard .027-inch aluminum gutters can bend or deform under heavy ice and snow loads. Upgrading to .032-inch gauge provides better strength but adds cost.
Steel Gutters: Overview
Steel gutters are made from galvanized steel (zinc-coated) or galvalume steel (aluminum-zinc alloy coated). They offer superior strength and rigidity compared to aluminum. Steel gutters are available in both seamless and sectional configurations.
Advantages of Steel Gutters
Superior Strength Steel gutters are significantly stronger and more rigid than aluminum. They resist bending, sagging, and deformation under heavy loads — a real advantage in Minnesota where ice and snow accumulation can be substantial. Steel gutters maintain their shape better over time.
Hail Resistance Steel's superior hardness makes it more resistant to hail denting than aluminum. For homes in hail-prone areas across St. Paul, Eden Prairie, and Maple Grove, steel gutters handle hailstorms better.
Less Thermal Movement Steel expands and contracts less than aluminum with temperature changes, which means less stress on mounting hardware and fewer expansion-related issues in Minnesota's extreme temperature range.
Ladder Resistance Steel gutters resist denting from ladders leaned against them — a practical advantage for homeowners who regularly clean gutters, hang holiday lights, or perform exterior maintenance.
Disadvantages of Steel Gutters
Corrosion Susceptibility Steel's biggest drawback is its susceptibility to rust. While galvanized and galvalume coatings provide corrosion protection, any scratch, chip, or wear in the coating exposes the underlying steel to moisture. In Minnesota's wet climate with salt exposure from nearby roads, rust can develop within a few years if the coating is compromised.
Heavier Weight Steel gutters weigh significantly more than aluminum — approximately 2–3 times heavier. This extra weight requires stronger fascia mounting, more robust hangers, and places greater stress on the home's structure. For older homes or those with questionable fascia, this weight can be problematic.
Higher Cost Steel gutters typically cost $9–$15 per linear foot installed — 30–50% more than comparable aluminum gutters. For a typical Minnesota home, this translates to $1,800–$3,000 or more.
Limited Color Options Steel gutter coil stock is available in fewer colors than aluminum. While major colors are available, specialty and custom colors are harder to source in steel.
Head-to-Head Comparison
| Feature | Aluminum | Steel | |---|---|---| | Cost per linear foot | $6–$12 | $9–$15 | | Rust resistance | Excellent | Moderate (coating dependent) | | Strength | Good | Excellent | | Weight | Light | Heavy | | Hail resistance | Moderate | Good | | Color options | 20–30+ | 10–15 | | Lifespan | 20–30 years | 20–25 years | | Seamless availability | Standard | Available | | Thermal expansion | Higher | Lower | | Maintenance | Minimal | Coating inspection needed |
Our Recommendation for Minnesota
For most Minnesota homeowners, seamless aluminum gutters in .032-inch gauge offer the best overall value. Aluminum's corrosion resistance is a decisive advantage in Minnesota's wet, salt-exposed environment. The weight savings reduce stress on fascia and mounting hardware, and the broad color selection ensures a perfect match for any home.
We recommend upgrading to the heavier .032-inch gauge for improved strength and dent resistance — the modest cost increase pays for itself in durability and performance.
Steel gutters are a strong choice for homeowners who prioritize maximum strength and hail resistance and are willing to invest in regular coating maintenance. They're particularly well-suited for commercial properties and homes in extremely hail-prone locations.
Contact Weatherguard Construction at (651) 439-4320 or book a free consultation online to discuss the best gutter material for your home. We serve Stillwater and the Twin Cities metro, plus Schaumburg, IL and Centennial, CO.
Frequently Asked Questions
Which lasts longer — aluminum or steel gutters?
In Minnesota, aluminum gutters typically last longer (20–30 years) than steel gutters (20–25 years) because aluminum doesn't rust. Steel gutters can last just as long if the protective coating remains intact, but any coating damage in our wet climate leads to accelerated rust and shorter lifespan.
Are steel gutters worth the extra cost?
Steel gutters are worth considering if you experience frequent hail, need maximum structural strength, or prefer the rigidity of steel. However, for most residential applications in Minnesota, the corrosion resistance and lower cost of aluminum make it the better value.
Can aluminum gutters handle Minnesota snow loads?
Yes, properly installed .032-inch gauge aluminum gutters with appropriate hanger spacing (every 18–24 inches) handle Minnesota's typical snow and ice loads well. In extreme conditions, gutter heating cables provide additional protection against ice damage.
Do aluminum gutters dent easily?
Standard .027-inch aluminum gutters can dent from hail, ladders, and impact. Upgrading to .032-inch gauge significantly improves dent resistance. While cosmetic dents don't typically affect gutter function, the heavier gauge provides better durability for Minnesota's demanding conditions.
