When comparing aluminium vs steel roller shutters, the key difference is the level of security and the overall appearance of the system. Window Security Solutions describes its steel shutters as the heavier-duty option, with a higher security specification, while aluminium shutters use a smaller box and guides and offer more design flexibility.

Both materials provide a tough physical barrier and visual deterrent, and both can be fitted internally or externally with manual or electric operation. The best choice depends on the risk level, the size and use of the opening, and how you want the shutter to look on the building.

How Do Aluminium and Steel Roller Shutters Compare?

Aluminium roller shutters are designed to provide security with a neater, less industrial appearance. WSS states that its standard aluminium shutters have a much smaller box and guide size than steel shutters and can be customised with punched or perforated designs.

Steel roller shutters are the heavier-duty option. WSS steel shutters use a 75mm lath and 20-gauge galvanised steel, giving them a higher security specification for commercial, retail and other higher-risk premises.

Both aluminium and steel shutters are available with manual or electric operation and can be installed on windows or doors. They are supplied in white or brown as standard and can be powder-coated in a wide range of colours.

Aluminium vs Steel Roller Shutters at a Glance

Feature	Aluminium	Steel
Security level	Tough physical barrier and visual deterrent	Higher-security, heavier-duty specification
Construction	Aluminium shutter system with smaller box and guides	20-gauge galvanised steel with 75mm lath
Appearance	Neater profile; punched and perforated designs available	More industrial appearance
Colour options	White or brown as standard; powder coating available	White or brown as standard; powder coating available
Operation	Manual or electric	Manual or electric
Installation	Internal or external	Internal or external
Typical use	Retail, residential and premises where appearance matters	Commercial, retail and premises needing higher security
Relative cost	Generally the lower-cost material in the WSS range	Typically higher due to the heavier-duty steel specification
Guarantee	12 months from purchase	12 months from purchase

Which Material Is More Secure?

For Window Security Solutions, steel is the stronger choice where maximum security is the priority. Its steel roller shutters are manufactured from 20-gauge galvanised steel with a 75mm lath and are described as offering a much higher security specification than the aluminium range.

WSS offers steel shutters ranging from budget manual options to high-specification, police-tested and insurance-approved automatic shutters. The wider roller shutter range also includes shutters tested and approved to LPS 1175-1.

That does not mean aluminium shutters are only decorative. They still create a tough physical barrier across the opening and act as a clear deterrent to vandals and burglars. For a lower-risk shop, home or commercial opening, aluminium can provide the right balance between security and appearance.

Security also depends on more than the curtain material. The guides, locking system, operation method and installation all contribute to how the complete shutter performs. If an insurer or risk assessment requires a particular approval, choose the exact tested shutter specification rather than relying on material alone.

Which Looks Better on a Shop Front or House?

Aluminium is usually the neater-looking option. Its smaller box and guides make the system less visually dominant, and punched or perforated designs give more flexibility when the shutter is closed.

A perforated aluminium shutter can allow some visibility through the curtain, which can be useful for shops that want window displays to remain partly visible outside trading hours. Aluminium shutters can also be powder-coated to complement the colour of the shop front, home or commercial building.

Steel has a more industrial appearance because of its heavier-duty construction, but it can still be powder-coated in a wide range of colours. Where the security requirement is higher, the extra visual weight may be an acceptable trade-off.

Which Is Best for Shops and Retail Premises?

For many standard retail premises, aluminium is a strong starting point because it combines a physical security barrier with a more discreet appearance. Punched and perforated options can also help the frontage feel less closed off when the shop is shut.

Steel is more suitable where the shop carries higher-value stock, has suffered repeated attacks or needs a more substantial security specification. WSS specifically positions steel shutters for commercial and retail premises requiring a higher level of protection.

If the shutter will be fitted externally to a shop front, check whether planning permission is required before ordering. The local authority may have its own rules on solid, perforated or open security shutters.

Which Is Best for Commercial and Higher-Risk Premises?

Steel is the more appropriate choice where security carries more weight than appearance. Commercial buildings, public buildings, schools and retail sites can all have openings where a heavier-duty barrier is justified.

WSS steel shutters can be supplied up to around 6,000mm high and 3,000mm wide depending on the overall weight of the shutter, which makes them suitable for substantial openings as well as standard doors and windows.

Both materials can be electrically operated, including key-switch and remote-control options. On a large opening that is used every day, electric operation is usually the more practical choice because staff do not have to manually raise, lower and lock the shutter each time.

Which Is Best for Homes?

Aluminium is normally the better fit for a home where appearance is an important part of the decision. The smaller box and guides are less industrial, while colour and design options make it easier to match the shutters to the property.

Steel can still be considered for residential openings where the security requirement is unusually high. The right choice should be based on the actual risk and how prominent the shutter will be when installed.

For garages, WSS also provides dedicated roller shutter garage doors manufactured from twin-walled aluminium, which are designed specifically for regular garage access and domestic use.

Is Steel More Expensive Than Aluminium?

Generally, yes. WSS describes aluminium as the cheaper option when comparing it with its galvanised steel shutters. Steel uses a heavier-duty specification, so it is normally chosen because the higher level of protection is worth the additional cost.

The final price still depends on more than the material. Important factors include:

• The width and height of the opening.
• Manual or electric operation.
• The security specification required.
• Punched or perforated designs where available.
• Colour and finish.
• Internal or external installation.
• The number of windows and doors being protected.

For an accurate comparison, price both options for the same opening and level of use. The WSS instant quote calculatorincludes aluminium electric shutters as well as manual and electric steel roller shutters.

How Do Manual and Electric Options Affect the Choice?

Material and operation are separate decisions. Both aluminium and steel shutters can be manual or electric, so you can choose the security material first and then decide how the shutter should be operated.

WSS manual shutters use bottom-rail shoot bolts or bullet locks. Electric shutters use a patented auto-lock system incorporating a Link Eurodrive motor with a 5-year manufacturer’s guarantee. For openings used frequently, electric operation can make the shutter easier to use day to day.

Frequently Asked Questions

Are steel roller shutters better than aluminium?

They are better where a higher security specification is the priority. WSS steel shutters use 20-gauge galvanised steel and a 75mm lath, while aluminium puts more emphasis on a smaller box, smaller guides and greater design flexibility.

Will galvanised steel roller shutters rust?

Galvanising gives steel an added layer of corrosion protection, which improves durability compared with untreated steel. The shutter and its finish should still be inspected and maintained in line with the installer’s guidance, particularly on exposed external installations.

Can aluminium shutters be punched or perforated?

Yes. WSS aluminium roller shutters can be supplied with punched or perforated designs, giving more choice over visibility and appearance when the shutter is closed.

Can aluminium and steel shutters both be fitted internally?

Yes. WSS states that both roller shutter types are suitable for internal or external installation to protect windows and doors.

Are WSS roller shutters insurance approved?

The WSS roller shutter range includes shutters tested and approved to LPS 1175-1 and police and insurance-approved specifications. If your insurer requires a particular rating, confirm the exact product specification before ordering.

Aluminium or Steel: Which Should You Choose?

Choose aluminium when you want a strong security barrier with a smaller, neater system and more flexibility over appearance. Choose steel when the opening needs a heavier-duty, higher-security specification and protection takes priority over having the most discreet shutter.

Window Security Solutions has supplied and installed window security since 1999 and provides nationwide survey and installation. Get an instant quote or call 0161 413 0766 for advice on the right shutter for your premises.