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Extendable Window Bars NZ

Easy DIY installation • Strong steel construction • Fast NZ delivery

Protect vulnerable windows with practical extendable security barsdesigned for New Zealand homes.

  • You can install the bars horizontally or vertically to suit different window layouts.
  • Multiple window bars can also be installed in parallel to cover larger areas.
  • Each window bar has a fixed side and an extendable side, allowing the overall width to be adjusted to fit your window.
Round bars are spaced 120mm apart, while square bars are spaced 100mm apart. This spacing maintains airflow and visibility while allowing the fixed side to cover beyond its physical width. For example, Type A has a 340mm fixed width but can effectively cover a wider area when installed with the recommended spacing.

Get Extra Coverage from the Fixed Side

The bars are designed with a set gap between each parallel bar:

  • Round bars are spaced 120mm apart
  • Square bars are spaced 100mm apart.

This spacing maintains airflow and visibility while allowing the fixed side to cover beyond its physical width.
For example, Type A has a 340mm fixed width but can effectively cover a wider area when installed with the recommended spacing.

Expandable Window Bars
Extendable Window Bars Size Comparison
Variants Expandable Side Fixed Side Bars Spaces Bar Type Price
Type A Min: 485mm
Max: 900mm		 340mm 120mm 3 round bars $54
Type B (BLACK) Min: 900mm
Max: 1650mm		 340mm 120mm 3 round bars $81
Type C (BLACK) Min: 630mm
Max: 1100mm		 300mm 100mm 3 square bars $66
Type D Min: 630mm
Max: 1100mm		 420mm 100mm 4 square bars $99
Type E Min: 630mm
Max: 1100mm		 540mm 100mm 5 square bars $108
Expandable Window Bars Installation Example
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Not Sure Which Size to Choose?

Measure your window width and height.
Choose a security bar that extends beyond your window opening rather than matching the exact size.

Example:
Window width = 900mm
Recommended range:
1100mm or 1650mm

More overlap can help improve stability and coverage.

Extendable Window Bars

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Frame Measurement
(Inside Window / Door Frame)




Best Fit Option

Click "Check Options" to view recommended window bar types and quantities for maximum coverage.

Best Value Option

Click "Check Options" to see the best value option with the fewest window bars that would fit into your window.
Extendable Window Bars 3 Round 900-1650mm (B) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA

Used Across New Zealand

Installed across:

  • Homes
  • Rental properties
  • Garages
  • Storage areas
  • Residential properties
  • Extendable window bars with 3 square steel security bars for residential window protection
  • Extendable window bars with 3 round steel security bars for residential window protection
  • DIY Xpanda Window Bars
  • Black extendable steel window bars installed on a residential window for security protection
  • Extendable window bars with 5 square steel security bars for residential window protection
  • Extendable window bars with 3 square steel security bars for residential window protection
  • Extendable window bars with 3 square steel security bars for residential window protection

Why Choose Window Bars?

  • Adjustable sizes
  • DIY installation
  • Practical protection
  • Ready-to-ship NZ-wide
  • Strong steel construction

DIY vs Custom Security

  • DIY Xpanda → ready to be installed
  • Custom → wait about 2 weeks
  • DIY Xpanda → affordable
  • Custom → premium price

Simple Installation

  1. Measure your window frame
  2. Mark mounting points
  3. Drill and fix brackets
  4. Expand bars and secure

What Are Window Bars?

Also known as:

  • burglar bars
  • window security bars
  • window guards

They create a physical barrier that deters intruders and delays entry.

Layered Security

Often paired with alarms and cameras for layered security.
Window security is often one part of a broader home protection approach.

Clear-Guard Polycarbonate Security Bars - Clear Guard, Commercial, Doors, Gates, Residential, Window Bars, Windows - A DIY XPANDA

Prefer a Less Visible Option?

Clear Guard (Polycarbonate)

Clear Guard polycarbonate protection offers a more discreet alternative while maintaining visibility and natural light.

  • Transparent appearance
  • Impact resistant
  • Maintains visibility
  • Helps preserve natural light
Check Out Clear Guard

Looking for insect protection rather than intrusion protection?

  • Magnetic insect screens can help improve ventilation while helping reduce insects entering your home.

    Our DIY products are designed to protect against human intrusions.
    BUT if you're looking for a preventative measure against insects and bugs, window screens can help!
    Check out our partner Stay Safe Home Plus and their magnetic insect screens!
    They offer custom-made magnetic window screens that fit your windows perfectly and are built to last.

  • Magnetic-Insect-Screen-Stay-safe-home-plus
Check It Out