Steel security doors are known for their maximum protection against forced entry, while aluminium doors resist rust and require almost no maintenance.

But that’s not all there is to it.

You also need to think about where you live, your budget, and how much upkeep you’re willing to handle.

That’s why we’re breaking it all down. You’ll see how steel and aluminium security doors perform in strength, maintenance, cost, and real-world conditions, so you can confidently pick the right door for your home.

Why Choosing the Right Material is Important

Pick the wrong material and you’ll deal with rust within 5 years or watch your door fall when you need it most. But durability is just the beginning. Your material choice also affects your upkeep, insurance premiums, and most importantly, how secure your home is.

In our 26 years of installing security doors across Australia, we’ve seen mistakes caused by choosing doors based on price alone. A steel door in a coastal home can corrode in under 10 years, while an aluminium door inland misses out.

The thing is, picking the right material saves you money and hassle over the door’s lifetime. Let’s break down what steel and aluminium actually deliver in real-world use.

Steel Security Doors: Maximum Protection

Steel doors are built from solid or reinforced steel frames. They’re the default choice when protection is the priority. Here’s what makes them a solid investment.

Stops Forced Entries

Someone kicking your door or using a crowbar? Steel holds where lighter materials buckle. That extra strength is why some insurance companies offer discounts for steel installations, since they genuinely reduce break-in risk. If you live in a higher-crime suburb like Fortitude Valley or Inala, or store valuable equipment at home, steel is the safer choice.

Lasts for Decades

A properly powder-coated steel door can last 20 years with minimal issues. The coating blocks moisture and weather damage. We’ve seen steel doors in dry, inland Brisbane areas look near-perfect after 15 years.

But there is a problem.

If the coating chips and you ignore it, rust appears fast. So, we recommend that you check your door once a year for scratches or worn spots. It’s better to touch them up before rust starts.

Aluminium Security Doors: Lightweight and Easy on the Wallet

Aluminium doors trade some impact resistance for rust-proof performance and easier daily use. For most Aussie homeowners, that’s a smart trade. There’s plenty more that aluminium brings to the table. Let’s know about them.

Rust will never be a Problem

Aluminium doesn’t rust. It forms a natural layer that protects the metal from corrosion. That means less maintenance for you and no checking for spots or repainting every few years.

Aluminium also handles humid or coastal conditions better, so your door stays strong and looks good for years.

Lighter Means Easier Everything

One of the biggest benefits of aluminium doors is that they are light. Even kids or older family members can open and close them without any struggle. Installation is easier, too, since you usually do not need heavy frames or reinforced hinges. The lighter weight puts less stress on the hardware, so your door will not sag or wear out as quickly.

Looks More Modern

These doors have clean lines and a contemporary style, instantly giving your home a fresh look. Their lightweight design also lets them feature more intricate patterns without weakening the frame. If curb appeal matters to you, aluminium doors give you plenty of stylish options without ever feeling industrial or heavy.

Head-to-Head: Steel vs Aluminium

Let’s put these two materials side by side and see how they actually stack up in the real world.

Factors	Steel	Aluminium
Strength	Maximum impact resistance and break-in protection	Handles everyday impacts but dents more easily
Maintenance	Needs annual maintenance and rust checks	Requires low to no maintenance
Cost	Higher upfront, potential insurance benefits	Lower upfront and easier to install
Climate Fit	Suited for dry, inland areas	Ideal for coastal or humid regions

Quick breakdown:

Strength

• Steel takes heavy hits and keeps intruders out better.
• Aluminium can dent under strong impact but still stops most residential break-ins.
• Edge: Steel for maximum security

Maintenance

• Aluminium resists rust and needs almost no upkeep.
• Steel requires regular care to stop chips from turning into rust.
• Edge: Aluminium for low-maintenance peace of mind

Cost

• Aluminium is cheaper upfront and easier to install.
• Steel costs more at first, though some insurers offer discounts that can help offset the cost over time.
• Edge: Aluminium for short-term savings; steel can win long-term with insurance perks

Climate Fit

• Salt air can damage steel fast, even with powder coating.
• Aluminium handles coastal conditions easily; steel performs well inland with basic care.
• Edge: Aluminium for coastal areas, steel for inland

Daily Use

• Aluminium doors open easily and put less strain on hardware.
• Steel doors are heavier, requiring more effort and causing extra wear over time.
• Edge: Aluminium for easier daily use and longer-lasting hardware

Which One Fits Your Home?

To be honest, the best choice depends on location, security needs, and budget.

Choose aluminium if:

• You’re near the coast or in humid conditions
• You want low maintenance and long life without upkeep
• Budget is limited, and you want an easier installation
• Easy daily operation is important for your household

Choose steel if:

• You’re inland or in dry suburbs
• Maximum protection is your top priority
• You’re in a higher-crime area or store valuable equipment
• You prefer the solid, heavy-duty feel of reinforced doors

Both materials work well when matched correctly. If you’re confused, talk to a local installer who knows your specific area.

Making Your Final Decision

Steel security doors and aluminium security doors both deliver solid home safety. Steel wins on strength and works brilliantly inland or in high-security situations. Aluminium takes the lead for coastal homes, easy maintenance, and budget-friendly installations.

Match your choice to your location, security needs, and maintenance preferences. There’s no wrong answer, just different priorities for different homes.

Still deciding? Get in touch with us and we’ll help you pick the right door for your home. Enfant Terrible has been installing security doors across Australia for over 25 years. We know what works in every neighbourhood.