Burglar Proofing Aluminium Windows: Best Options for SA Homes

🔐 The complete guide to securing your aluminium windows – from budget fixes to premium protection

Let me be direct with you. In South Africa, burglar proofing aluminium windows isn’t optional – it’s essential. I’ve seen too many homes where the only thing between a family and an intruder was a simple latch lock that could be forced with a screwdriver in seconds.

The good news? You don’t need to spend a fortune to dramatically improve your window security. Some of the best anti-burglar windows features cost under R500. The key is knowing which options work best for your specific windows, risk level, and budget.

In this complete guide to how to burglar proof aluminium windows, I’ll walk you through every option: from basic lock upgrades to security bars, security film, laminated glass, and smart alarms. You’ll learn the pros and cons of each, approximate costs, and which combination offers the best protection for your situation.

For more security guidance, read our security features guide, security door guide, or locks guide. Ready to secure your windows? Let’s dive in.

🔍 Assessing Your Window Vulnerabilities

Before you start burglar proofing aluminium windows, identify your weak points.

Walk around your home and check:

• Which windows are hidden from the street? (Back, sides, courtyard)
• Which windows are accessible from flat roofs, walls, or bins?
• Do all windows have functioning locks? Are they basic or upgraded?
• Is the glass standard annealed (breaks easily) or toughened?
• Are there existing security bars? Are they properly fixed?
• Can you lift sliding windows off their tracks?

Priority windows (secure first):

• Ground floor windows (especially back and side)
• Windows near flat roofs or low walls
• Bathroom windows (often overlooked but accessible)
• Kitchen windows (near bins, potential climbing aids)
• Windows visible from the street but accessible (burglars work fast)

According to SAPS crime prevention guidelines, most residential burglaries occur through ground floor windows and doors.

🔒 Lock Upgrades – First Line of Defence

Most aluminium windows come with basic locks that offer minimal security. Upgrading is essential for window security.

Casement window locks (hinged windows):

• Standard latch (basic): Provided with most windows. Easily forced with a screwdriver or credit card. Acceptable only for first floor and above.
• Key-locking handle (good): Requires a key to operate. Prevents intruders from opening the window even if they break the glass and reach in. Cost: R500-900 per window.
• Multi-point locking handle (best): Single handle operates 2-3 locking hooks along the frame. Much harder to force. Standard on premium windows, can be retrofitted. Cost: R800-1,500 per window.
• Security handle (premium): Reinforced design with anti-drill, anti-pick cylinders. Cost: R1,000-2,000 per window.

Sliding window locks:

• Standard hook lock (basic): Single hook that engages the frame. Can be forced.
• Keyed sliding lock (good): Adds a key cylinder to the hook lock. Prevents operation without a key. Cost: R300-600 per window.

The simplest upgrade – window pin lock: Drill a small hole through the sliding window frame and insert a metal pin or nail. Prevents the window from sliding open even if the lock is forced. Cost: Free (if you have a drill) to R50. This is the cheapest anti-burglar windows fix you can do.

Read our detailed locks guide for specifications and installation tips.

🔘 Security Bars & Grilles – Physical Barriers

If you want real burglar proofing aluminium windows, security bars are the gold standard.

Types of security bars:

• Fixed bars (traditional): Welded steel bars fixed to the wall or frame. Very secure but permanent. Not suitable for bedroom windows (fire escape). Cost: R1,000-3,000 per window.
• Hinged or removable bars: Can be opened from inside for emergency escape. Must meet fire safety regulations. Cost: R1,500-4,000 per window.
• Internal bars (mounted inside frame): Less visible from outside, still secure. Cost: R1,000-2,500 per window.
• Decorative bars: Curved or patterned – aesthetically pleasing while secure. Cost: R2,000-5,000 per window.
• Trellis/expanded mesh: Smaller openings prevent hands from reaching through. Popular for ground floor. Cost: R1,500-3,000 per window.

Material comparison:

• Steel bars: Strongest, most affordable. Rusts in coastal areas – needs powder coating or galvanising. Cost: R1,000-3,000 per window.
• Aluminium bars: Lightweight, rust-proof, less strong than steel. Good for coastal areas. Cost: R1,500-4,000 per window.
• Stainless steel bars: Strongest and rust-proof. Most expensive. Best for coastal areas. Cost: R3,000-8,000 per window.

Fire safety regulations (critical): Fixed bars on bedroom windows are illegal in most municipalities. Bedroom windows must have hinged or removable bars for emergency escape. Always check local building regulations. Read our guide for detailed regulations.

🪟 Security Film & Laminated Glass – Smash Protection

Locks and bars don’t stop someone from smashing the glass. For complete window security, address the glass itself.

Options for glass security (least to most expensive):

• Toughened (tempered) glass: Standard in most modern windows. Stronger than annealed glass but still shatters. Not a security feature – just impact resistance.
• Security film (retrofit): Thick polyester film applied to existing glass. Holds broken glass together, delaying entry. Cost: R300-600 per m² installed. Great value upgrade.
• Laminated glass (new or replacement): Plastic interlayer between glass panes. Glass stays attached when broken. Very hard to penetrate. Cost: +R400-800 per m² over standard glass.
• Security film + laminated glass: Maximum protection. Adds delay even if both layers are attacked.

How security film works: When glass is struck, it cracks but the film holds the fragments together. An intruder must smash repeatedly to create a hole – takes minutes instead of seconds. Often enough to trigger an alarm or deter the intruder.

DIY vs professional installation: Security film can be DIY (cost R200-400 per m² for material) but professional installation (R300-600 per m²) ensures no bubbles or peeling edges. For large windows, hire a professional.

Read our security features guide for more on glass options.

🔩 Hinge Security – Preventing Removal

On hinged casement windows, the hinges themselves can be a weak point.

The problem: Standard hinges have exposed pins. An intruder can knock out the pins and remove the entire window sash – lock and all.

Solutions:

• Security hinges (non-removable pins): Pins cannot be removed when the window is closed. Cost: R400-800 per pair.
• Hinge bolts (retrofit): Small bolts that secure the hinge to the frame, preventing pin removal. Cost: R100-250 per hinge.
• Through-bolts (screw through hinge): Replaces hinge pins with bolts that go through the hinge into the frame. Very secure.

Recommendation: For ground floor casement windows, install security hinges or hinge bolts. It’s a small cost for significant security improvement.

🪟 Sliding Window Specific Security

Sliding aluminium windows have unique vulnerabilities that need specific anti-burglar windows measures.

Sliding window weak points:

• Can be lifted off the track (if no anti-lift blocks)
• Standard hook locks can be forced
• Glass panels are large – easy to break

Essential sliding window security upgrades:

• Anti-lift blocks: Small blocks on the top track that prevent the window from being lifted out. Most modern windows have them – check. Add if missing. Cost: R100-300 per window.
• Keyed lock: Upgrades the standard hook lock to require a key. Cost: R300-600 per window.
• Pin lock (the DIY solution): Drill a small hole through the sliding frame and insert a nail or pin. Prevents sliding even if the lock is forced. Cost: Free to R50.
• Security bar: A metal or wooden bar wedged between the sliding window and frame. Very effective and affordable. Cost: R100-300 per window.
• Security film: Applied to the glass. Holds broken glass together. Cost: R300-600 per m².

The 50c trick: Cut a wooden dowel or broom handle to the width of the track. Place it in the track behind the sliding window. The window can’t slide past the dowel. Cost: R0 (if you have an old broom handle). This is the cheapest how to burglar proof aluminium windows trick I know.

Read our child safety guide for sliding doors (similar principles).

📱 Alarm Integration & Smart Security

Physical security combined with detection provides the best protection.

Window sensors:

• Magnetic reed switches – detect when a window is opened
• Connect to your home alarm system
• Cost: R200-500 per sensor plus alarm system
• DIY installation possible (wireless sensors)

Glass break sensors:

• Detect the sound or vibration of breaking glass
• Mount on the glass or frame
• Cost: R300-800 per sensor
• Works regardless of whether the window was locked or not

Smart security integrations:

• Wi-Fi enabled sensors send alerts to your phone
• Integration with CCTV cameras – record when window is opened or glass broken
• Remote monitoring – check window status from anywhere

For comprehensive security, integrate with CCTV systems and garage door security.

💰 Budget Guide – Burglar Proofing by Price Range

You can burglar proof aluminium windows at almost any budget.

Budget (under R500 per window) – Best value upgrades:

• Pin lock or dowel in track (free to R50)
• Security bar for sliding windows (R100-300)
• Keyed lock upgrade (R300-600 – slightly over R500 but worth it)
• Tighten all screws and check existing hardware (free)

Mid-range (R500 – R2,000 per window):

• Multi-point lock (R800-1,500)
• Security film (R300-600 per m²)
• Window sensors for alarm (R200-500)
• Hinged burglar bars (R1,500-4,000 – above mid-range but best value)

Comprehensive (R2,000+ per window):

• Hinged burglar bars (R1,500-4,000)
• Laminated glass replacement (R400-800 per m² extra)
• Security hinges (R400-800 per pair)
• Full alarm integration with glass break sensors

Read our security door cost guide for entrance protection.

✅ Best Security Combinations – Defence in Depth

The most effective anti-burglar windows strategy uses multiple layers.

For ground floor windows (high risk):

• Layer 1: Multi-point lock (R800-1,500)
• Layer 2: Hinged burglar bars (R1,500-4,000) or security film (R300-600 per m²)
• Layer 3: Window sensor (R200-500)
• Total: R2,500 – 6,000 per window – comprehensive protection

For ground floor windows (budget):

• Layer 1: Keyed lock (R300-600)
• Layer 2: Security film (R300-600 per m²) or dowel in track
• Layer 3: Window sensor (R200-500) – optional
• Total: R600 – 1,700 per window – good protection on a budget

For first floor and above (lower risk):

• Layer 1: Keyed lock (R300-600) or multi-point lock (R800-1,500)
• Optional: Window sensor (R200-500)
• No bars needed (fire escape important on upper floors)
• Total: R500 – 2,000 per window

Read our security features guide for more combinations.

🔥 Fire Safety – Emergency Escape Considerations

Security measures must never trap you inside during a fire.

Critical fire safety rules:

• Bedroom windows: Must have hinged or removable burglar bars – NEVER fixed bars.
• Security film: Does not prevent escape – you can push through after breaking glass (takes more effort, but possible).
• Keyed locks: Keep keys accessible near the window (hook on the wall, not hidden).
• Multi-point locks: Ensure you can operate them quickly – practice emergency release.

Legal requirements: In most South African municipalities, fixed burglar bars on bedroom windows are illegal. Only hinged or removable bars are permitted. Check local building regulations before installing.

Family emergency plan: Ensure every family member knows how to open security features from inside. Practice emergency escape drills – including opening hinged bars or removing window pins.

💰 Burglar Proofing Aluminium Windows Cost Estimates

Here’s what different how to burglar proof aluminium windows options cost.

Use our Beat Your Quote guarantee for competitive pricing.

❓ Frequently Asked Questions About Burglar Proofing Aluminium Windows

✅ Final Thoughts: Start With One Window Today

After reading this burglar proofing aluminium windows guide, you have everything you need to secure your home.

Don’t try to do everything at once. That’s overwhelming and expensive. Start with the most vulnerable windows – ground floor at the back and sides. Install a wooden dowel in sliding windows (free). Add a keyed lock (R300-600). Apply security film (R300-600 per m²). For under R1,000 per window, you’ve made it much harder for an intruder.

Then work through the rest of your home. Add sensors to your alarm system. Install hinged burglar bars on bedrooms. Upgrade to multi-point locks over time.

Every window you secure makes your home a less attractive target. Burglars look for easy opportunities. Don’t be that house.

Key takeaways for burglar proofing aluminium windows:

• Start with the most vulnerable windows (ground floor, back/side)
• Use multiple layers – locks, film/glass, bars, sensors
• The wooden dowel trick is free and effective for sliding windows
• Keyed locks (R300-600) are the minimum for ground floor
• Security film (R300-600 per m²) is excellent value – delays entry by minutes
• Hinged burglar bars are required on bedrooms (fire safety) – never fixed bars
• Window sensors don’t prevent entry but detect it – add to alarm system
• You don’t need to do everything at once – prioritise and phase over time
• Use ServiceLink SA to find verified security specialists

Your next step: Walk around your home today. Identify the three most vulnerable windows. Secure them this week with at least keyed locks and dowels. Then plan the next phase. Your family’s safety is worth it.

For more information about home security, explore our related resources: security features guide, security door cost guide, door comparison, locks guide, and child safety guide. Learn about our process on how we protect homeowners and scam prevention. Find security specialists in your area: Gauteng, Johannesburg, Pretoria, Sandton, Midrand, and Fourways. For integrated security, see our CCTV and garage doors and gates guides.