Guide · 6 min read
Iron, steel, aluminum or stainless?
A plain-English comparison of railing and gate materials for NYC homes: strength, rust, weight, look, maintenance and cost.
Choosing the material for a railing, gate or fence affects how it looks, how much it costs, and how much maintenance it needs. Here's how the options compare.
"Wrought iron" (mild steel)
Almost all modern 'wrought iron' is mild steel worked in the traditional style. It's strong, easy to weld and shape into scrolls and pickets, and the most affordable option. Its weakness is rust: outdoors it needs a good coating system and occasional repainting.
Galvanized steel
The same steel, dipped in molten zinc after fabrication. Galvanizing under paint is the longest-lasting way to protect outdoor steel, which is why we recommend it for stoops, fences and fire-escape-adjacent work near the water.
Aluminum
Light and naturally corrosion-resistant. Great for roof decks where weight matters and for marine exposure. It's less stiff than steel, so sections are larger, and it's harder to weld well (we TIG-weld it).
Stainless steel
Premium look, minimal maintenance, excellent for modern interiors, restaurants and terraces. Use 316 outdoors and near salt water; 304 indoors. It costs more and requires careful welding and finishing.
Quick comparison
- Lowest cost: mild steel, painted
- Longest life outdoors per dollar: galvanized + painted steel
- Lightest: aluminum
- Lowest maintenance & most modern: stainless (316 outdoors)
- Most traditional look: mild steel worked as 'wrought iron'
Not sure which fits your project? Send photos and we'll recommend a material and finish based on exposure, budget and the look you want.
This guide is general information, not legal or engineering advice. Requirements change and depend on your building — confirm with NYC DOB, the relevant agency, or your architect/engineer.