A detailed comparison between aluminum and galvanized steel roller shutter doors regarding weight, cost, lifespan, and weather resistance.
Weight and Structural Loads on the Facility and Motor
Aluminum stands out for its very lightweight nature compared to steel, meaning loads on the concrete lintel or supporting structure are much lower. Consequently, lower capacity motors with a longer lifespan are sufficient. Conversely, heavy steel requires robust structural adjustments, high-torque motors, and higher operational and maintenance costs.
Corrosion and Rust Resistance in Coastal and Industrial Environments
Aluminum possesses excellent natural resistance to rust and corrosion, even when exposed to high humidity or salts, making it the king of coastal areas. Although steel is galvanized and electrostatically painted, any scratch over time can allow rust to penetrate if periodic maintenance and protection are neglected.
Security Level and Protection against Intrusion and Theft
Here, the clear advantage goes to galvanized steel shutters. The thickness and rigidity of steel make it very difficult to penetrate or break compared to aluminum. This is why jewelry shops, high-value warehouses, and factories always prefer steel shutters, as they provide maximum protection and a powerful first line of defense against theft attempts.
Thermal and Acoustic Insulation Efficiency and Energy Consumption Gap
Aluminum shutters win this point thanks to polyurethane foam injection inside the slats, offering excellent thermal insulation that helps maintain indoor cooling and cuts AC power consumption. Steel shutters are usually single-skinned without insulation, except in custom double-wall setups that carry high costs.
Economic Cost and Price vs Value Variance over the Long Term
The price of aluminum shutters is usually higher in upfront cost per meter compared to steel. However, considering fewer motor breakdowns and no need for repainting or rust treatment, aluminum saves money over the long term. Steel remains economical for massive clear spans where aluminum execution is challenging.
