Quick Answer
Steel is the most common choice for San Antonio roofs because it is strong, resists hail denting well, and costs less than aluminum. Aluminum is lighter and naturally corrosion resistant, which makes it ideal near salt water, but it is softer and dents more easily. Inland San Antonio homes usually get the best value from coated steel.
Steel Roofing
Most residential metal roofing is steel coated with zinc (galvanized) or an aluminum-zinc alloy (Galvalume), then painted. The coating protects the steel from rust.
- Strong and dent resistant for its thickness
- Lower cost than aluminum
- Wide selection of colors, profiles, and panel styles
- Very good performance in hail and wind
Aluminum Roofing
Aluminum does not rust. It forms a thin protective oxide layer on its own, which is why it is popular on the coast where salt air attacks steel.
- Naturally corrosion resistant
- Lighter than steel
- Softer, so it dents more easily in hail
- Higher material cost
What Makes Sense in San Antonio
San Antonio is well inland, so coastal salt corrosion is not the concern it is in Corpus Christi or Galveston. That takes away aluminum's biggest advantage.
Hail is a much bigger factor here. Steel's strength and lower price make it the better fit for most San Antonio homes and businesses.
Aluminum can still make sense for special situations, such as buildings exposed to chemicals or certain livestock operations where corrosion is a concern.
Weight and Structural Considerations
Both steel and aluminum are far lighter than tile or slate and lighter than many shingle tear-offs with multiple layers. That makes either metal a good option for older homes or roofs where weight is a concern.
Aluminum's lighter weight can matter on specialty structures, but for most San Antonio homes, steel's weight is not an issue. The bigger structural question is the condition of the decking and framing, which should be checked during tear-off regardless of which metal you choose.
Thickness and Coating Matter Too
Whatever metal you choose, panel thickness and finish quality affect performance. Ask about gauge, the metallic coating, and the paint system, since premium paint finishes resist fading and chalking far longer.
We will walk you through the options during a free inspection so you know exactly what you are buying.
Frequently Asked Questions
Does steel roofing rust?
Coated steel is protected by zinc or Galvalume and paint. Rust is rare unless the coating is scratched, cut, or damaged and left untreated.
Is aluminum roofing better for hail?
No. Aluminum is softer than steel and dents more easily, so steel is usually better in hail-prone San Antonio.
Which is cheaper, aluminum or steel roofing?
Steel is generally less expensive than aluminum for the same roof.
Contact Sanchez Metal Roofing
Phone: (210) 708-3308. Email: sanchezmetalroofing123@gmail.com. Address: 520 Fredericksburg Rd, San Antonio, TX 78201. Hours: Monday through Saturday 8:00 AM to 5:00 PM. Free roof inspections across San Antonio. Call (210) 708-3308.