Metal siding has become a popular choice for homeowners looking for a balance of durability, low maintenance, and modern style. Steel siding and aluminum siding offer unique benefits that make them stand out from traditional materials like vinyl, wood, or fiber cement siding. They’re tough enough to handle harsh weather, won’t rot or warp, and come in finishes that can complement any home design — from classic to contemporary.
While steel and aluminum are both metal materials, they don’t perform quite the same. Each material has its strengths when it comes to weather resistance, lifespan, and upkeep. Knowing the differences can help you pick the right siding for your home.
What Is Steel Siding?
Steel siding is a type of metal exterior made from heavy-gauge, galvanized steel panels designed to deliver long-lasting strength and weather protection. It’s built to withstand the toughest conditions — resisting dents, warping, cracking, and fading — while maintaining a sleek, high-quality appearance for 40–70 years. Taking sustainability even further, steel is a completely recyclable material.
Having a low-maintenance siding is a big win for many homeowners, and steel siding delivers. The siding material doesn’t need to be repainted, sealed, or touched up, even after years of exposure to sun, snow, or rain. Beyond its toughness, steel siding offers impressive design flexibility. It comes in profiles such as lap, board and batten, and log, and can feature smooth or woodgrain finishes.
Homeowners often choose steel siding for its longevity and stability. It won’t warp with heat, swell from moisture, or become brittle in cold temperatures, giving it a longer lifespan than most other materials, including aluminum siding. Steel’s rigidity also helps it hold its shape and resist damage from impacts, making it ideal for regions prone to severe weather. For homes in wildfire-prone areas, steel boasts fire-resistant properties, providing homeowners with peace of mind.
What Is Aluminum Siding?
Aluminum siding is a lightweight metal cladding made from thin sheets of aluminum coil stock that are coated, painted, and sometimes embossed with woodgrain textures. It became popular in the mid-20th century as a durable, low-maintenance alternative to wood siding. While its popularity has declined in recent years, aluminum can be a good option for homeowners seeking an affordable and corrosion-resistant exterior material.
Aluminum siding is lightweight, with a minimum gauge between 0.019–0.024 inches. Because it’s a lighter material, contractors can quickly cut and fit siding panels to any home style. The metal naturally resists rust and won’t absorb moisture, which makes it suitable for humid or coastal climates. It’s also non-combustible and recyclable, appealing to environmentally conscious homeowners.
Aluminum siding is available in horizontal lap, vertical, and shingle-style panels. Manufacturers often finish the metal with baked-on enamel paint or textured coatings to mimic the look of wood. However, these finishes can fade, chalk, or scratch over time — especially with prolonged sun exposure. Dents from hail, ladders, or everyday impacts can also be difficult to repair without replacing entire panels.
While aluminum siding provides decent protection and versatility, it doesn’t offer the same level of strength and impact resistance as heavier-gauge steel. Its thinner composition can make it more susceptible to bending and surface damage, particularly in storm-prone areas.
Is Aluminum Siding Still Used?
Aluminum siding is still used today, but not as much as it was in the past. Now, the material is more commonly used in situations where rust resistance and affordability are top concerns, such as for smaller projects, mobile homes, or coastal properties.
Does Aluminum Siding Rust?
Aluminum siding does not rust. Rust is more commonly associated with steel because it contains iron. Aluminum does not, so it won’t oxidize into rust when exposed to moisture. Instead, it forms a thin, protective oxide layer that helps prevent corrosion. It’s worth noting that high-quality steel siding is also rust-resistant, thanks to the material being coated with protective layers to seal out moisture.
How to Choose Between Steel Siding vs. Aluminum Siding
Steel and aluminum are durable, weather-resistant, and fire-resistant metal siding options. While each material offers benefits over traditional wood siding or vinyl siding, they perform differently under certain conditions. Compare steel siding vs. aluminum siding to decide which type of siding works best for your home.
Is Steel Siding More Durable Than Aluminum?
Steel siding is significantly more durable than aluminum. Steel’s heavier gauge gives it superior impact resistance, making it less likely to dent or bend when hit by hail, debris, or accidental bumps. It also resists warping, cracking, and extreme temperature changes, which helps it maintain its shape and finish over time.
Steel siding can last 40 to 70 years or more with minimal maintenance. Aluminum siding is softer and more prone to denting. It can also fade or chalk faster under UV exposure. With proper care and occasional repainting, aluminum siding typically lasts 20 to 40 years.
Which Is Better for Coastal Climates: Aluminum or Steel?
Aluminum siding performs well in coastal environments because it doesn’t contain iron and, therefore, won’t rust when exposed to salt air or moisture. This natural corrosion resistance makes it a solid choice for seaside homes.
Modern steel siding has made major advances in coastal protection. Premium coatings create a barrier against moisture and oxidation, allowing steel siding to hold up well even in humid or storm-prone areas.
Which Is Easier to Maintain: Steel or Aluminum?
Both materials are relatively low maintenance, but steel siding requires less long-term upkeep. High-quality steel panels are coated to prevent rust and fading, meaning they rarely need repainting. A simple rinse once or twice a year is enough to keep them looking new.
Aluminum siding can lose its color or develop a chalky film over time, especially under intense sunlight. Repainting or refinishing may be needed every 10–20 years to maintain its appearance. It’s also more prone to denting, which can make siding replacement and repairs more noticeable.
Which Metal Siding Has Better Curb Appeal?
Steel siding offers more design versatility and a higher-end look. It’s available in a wide range of styles with realistic woodgrain textures and durable matte finishes. Thanks to advanced coating technology, steel retains its color and gloss for decades without fading.
Aluminum siding can also be attractive, especially when new, and is available in similar profiles. Its thinner construction and painted surface can show wear and dents more easily over time. For homeowners prioritizing long-lasting beauty and architectural style, steel siding provides stronger curb appeal.
Is Steel or Aluminium Siding More Expensive?
Both metal siding options feature a similar price point. Steel siding costs between $4.25–$8.50 per square foot, while aluminum costs $4.50–$8.20 per square foot. Aluminum siding may be slightly less expensive on the high end of the range, but because it doesn’t last as long, the more cost-effective choice is steel.
Steel Stands Out as the Best Metal Siding Option
Metal siding can be beneficial in protecting homes in coastal areas or locations with extreme weather conditions. Steel siding is the best siding choice for protecting homes thanks to its longevity and low maintenance.
If you’re preparing to build a new house or upgrade your home’s exterior, explore TruLog’s steel siding catalog to find designs that fit your home’s style.
