What aluminium buys over steel
Aluminium does not rust, ever, and it comes powder-coated in a factory finish that holds its colour under Highveld UV without repainting. It is lighter than steel, so the posts and beams look slimmer for the same span, which is why architects and estate design panels in Sandton, Fourways and Waterfall specify it. The trade-off is price and, on very wide spans, a slightly heavier section to match steel's stiffness.
| Aluminium | Steel | |
|---|---|---|
| Rust | Never | Galvanise/coat to prevent |
| Finish | Factory powder-coat | Chromadek / powder-coat |
| Look | Slim, modern | Sturdy, traditional |
| Single price | R12,000 – R22,000 | R6,500 – R14,000 |
Aluminium and hail
An aluminium carport still needs the right roof to stop hail — the frame is rust-proof, but a shade net or thin polycarbonate roof on an aluminium frame will not protect a car. Pair the aluminium structure with IBR-profile aluminium or polycarbonate rated for impact; the reasoning is the same as for steel carports and is set out in carports and Highveld hail.
Where aluminium makes sense
Aluminium earns its premium in the northern suburbs — estates with strict design codes, homes where the carport is on show from the street, and coastal-style modern builds. On a plot or a value stand, a galvanised steel carport gives the same protection for less. Compare both on the carport prices in Johannesburg page.
Common questions
How much is an aluminium carport in Johannesburg?
An aluminium carport in Johannesburg costs from R12,000 for a single and R22,000–R40,000 for a double, supplied and installed — about one and a half times an equivalent steel carport.
Is an aluminium carport better than steel?
Aluminium never rusts and holds a factory powder-coat finish, which suits estates and homes where looks matter. Steel is stronger for the price and, when galvanised, lasts for decades. Both need a hail-rated roof to protect a vehicle.
Does aluminium stop hail?
The aluminium frame is durable, but hail protection comes from the roof. An aluminium carport must be fitted with impact-rated IBR-profile aluminium or polycarbonate sheeting to stop Highveld hail — a shade net roof only shades.