California Fencing Contractor (C-13) License Practice Exam 2026 – Complete Study Guide

Corrosion resistance with low maintenance is the deciding factor here. Aluminum resists rust and weathering naturally, so it stays looking good with far less upkeep than steel, which can rust once coatings wear through. It can be formed into delicate, decorative ornamental profiles without sacrificing enough rigidity for typical fence spans, especially when designed with appropriate thickness and supports. In addition, aluminum accepts durable finishes like powder coating, which enhances its appearance and further protects it from the elements.

By contrast, galvanized or welded steel relies on protective coatings that can crack, wear, or delaminate over time, leading to more ongoing maintenance to prevent corrosion. Welded steel assemblies may also be heavier and more prone to maintenance issues at joints. For an ornamental fence where corrosion is the main concern and low maintenance is desired, aluminum offers the best combination of aesthetics, durability, and ease of upkeep.