At first glance, both aluminium vertical blade fences and aluminium vertical slat fences look sleek, modern, and beautifully linear. They’re both made of powder-coated aluminum, both low-maintenance, and both popular choices for Melbourne homeowners wanting a stylish, long-lasting boundary.
But there’s one key difference:
- Blade fences use upright vertical blades fixed at 90°, creating a bold, sculptural appearance.
- Slat fences use flat-faced, parallel aluminium slats, forming a smooth, flush surface with gentle transparency.
That single change in angle makes a huge difference in privacy, airflow, aesthetics, cost, and visual impact. Let’s break it down in detail so you can decide which one suits your property best.
Read more: Powder Coated Aluminium Slat Fencing Cost per Metre in Melbourne [2025 Local Guide]
What is an Aluminium Vertical Blade Fence?
1. General Overview – Aluminium Vertical Blade Fence — 90° Profile Description
An aluminum vertical blade fence features wide, flat blades mounted vertically at a 90° angle to the rails and posts. Each blade stands upright like a fin, forming a bold and structured appearance.
These fences are often called architectural blade systems because of their strong, 3D presence.
They can be installed straight or slightly offset for one-way privacy.
Design Features
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Blade angle: Fixed at 90° (upright)
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Blade width: Typically 40–80 mm
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Thickness: Around 10–16 mm
- Spacing: Adjustable, typically 10–25 mm
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Material: Extruded, powder-coated aluminum
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Finish: Matte, textured, or metallic finishes available
2. Front View
From the front, the fence appears as a series of evenly spaced vertical lines. Each aluminium blade is seen edge-on, presenting a narrow, minimal silhouette. The look is clean and continuous — giving a strong architectural presence, ideal for modern home frontages or commercial façades. Because the blades are set at a true 90°, the front view provides:
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A consistent, linear rhythm
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Balanced spacing
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A sleek, flat-faced alignment that emphasizes height and order
In architectural drawings, this is the most representative view of the fence’s vertical alignment.
3. Side View – Left or Right
When viewed from either left or right, the depth of the fence becomes clear.
Since each blade is installed perpendicular (90°) to the rails, the viewer now sees the full face of the blades instead of their thin edge.
This gives the fence a solid, wall-like appearance with overlapping panels that can block direct sightlines, offering excellent privacy and shading.
Depending on the viewing angle:
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At 0° (front) → blades appear as thin lines
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At 45° → partial visibility through the gaps
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At 90° (side) → full coverage, almost opaque
This characteristic makes the fence both functional and dynamic, as its transparency changes with perspective — a key design advantage for modern façades.
4. Top View
From above, the fence reveals the flat rectangular profiles of each blade. You can clearly see the parallel arrangement and the consistent spacing between blades, all aligned at a perfect 90° angle to the rails.
This view highlights:
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The depth of each blade
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The distance between them (privacy gap)
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The precise engineering of the fence module
It’s this top-view geometry that defines the system’s structural efficiency — strong against wind loads and designed for clean water drainage and minimal maintenance.
What is an Aluminium Vertical Slat Fence?
In contrast, an aluminium vertical slat fence uses flat-faced aluminium slats that are welded in a parallel, flush alignment between the rails — not standing upright at 90°. This gives the fence a smooth, linear façade that looks lighter and more open than a blade fence.
Design Features
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Slat angle: Flat, aligned parallel (not upright)
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Slat width: 30–60 mm
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Spacing: Adjustable, typically 10–25 mm
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Profile: Flat-faced, welded between top and bottom rails
2. Front View
From the front view, the fence appears as a continuous field of vertical lines, evenly spaced with consistent rhythm. Because each slat lies flat on the same plane, the surface looks uniform and smooth, producing a refined, minimalist look.
The front view highlights:
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A flat, even façade with subtle linear shadows
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Soft visual permeability, maintaining openness
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A lightweight, elegant feel, perfect for modern homes and landscaping
This design offers a gentler visual profile compared to a vertical blade fence, which appears thicker and more enclosed.
3. Left / Right Side View
From the left or right view, you can clearly see that the slats are flat and aligned in one direction, not set perpendicular to the rail.
This parallel arrangement makes the fence partially see-through even from an angle, allowing both light and air to move freely through the slats.
Depending on the viewing angle:
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At 0° (front) – appears solid with defined vertical lines
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At 45° – creates a gentle pattern of alternating light and shade
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At 90° (side) – visibly open, showing the gaps between slats
This quality gives the fence a light, breathable appearance that’s ideal for warmer climates or outdoor areas requiring airflow.
4. Top View
From the top view (as shown in your image), the slats are arranged flat and parallel, welded flush within the frame.
There’s no 90° vertical projection — instead, all elements sit on a flat plane, forming a unified surface.
This configuration ensures:
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Precision alignment between slats
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Even spacing for consistent aesthetics
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Strong, welded joints that maintain panel stability
It’s a clean, efficient design that minimizes shadowing and simplifies maintenance.
Core Differences: Aluminium Blade vs Slat Fence
Although both fences share the same aluminum construction and sleek vertical styling, the difference in profile orientation — 90° upright blades versus flat-faced welded slats — makes a big impact on how they look, perform, and function.
Here’s how they compare across the core categories:
1. The Design and Visual Impact
Blade Fencing — Bold and Architectural
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Strong shadows and depth
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Creates a sense of solidity and strength
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Excellent for statement boundaries or modern façades
Slat Fencing — Smooth and Lightweight
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Flat, streamlined, and uniform look
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Subtle transparency that softens the boundary
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Feels more open, ideal for blending with greenery
Quick Summary:
| Vertical Blade Fence | Flat-Faced Vertical Slat Fence | |
|---|---|---|
| Visual Effect | Deep, bold, 3D texture | Smooth, flush, modern flat look |
| Perception | Private and solid | Light and semi-transparent |
| Design Style | Architectural statement | Minimalist and refined |
2. Privacy, Light & Airflow
This is one of the biggest practical differences between the two.
Blade Fence
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Blades overlap when viewed from the side, blocking direct sightlines.
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Can provide near-total privacy, depending on spacing and blade width.
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Excellent for high-traffic or front-facing areas.
Slat Fence
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Because the slats lie flat and are parallel, the fence maintains visual openness from all angles.
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Allows airflow and filtered sunlight — perfect for backyards, courtyards, or pool fencing.
Verdict:
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Choose blade fencing for privacy and shade.
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Choose slat fencing for ventilation and openness.
3. Security & Anti-Climb Performance
A vertical blade fence provides better anti-climb protection because of its vertical, upright faces and minimal handholds.
It’s often used in commercial properties or homes with higher security needs.
A flat-faced slat fence, while still strong and durable, is less restrictive — ideal for residential settings where airflow and design aesthetics are more important than full security.
4. Durability, Maintenance & Lifespan
Both systems use high-grade, powder-coated aluminum, offering:
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Corrosion resistance (no rust)
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UV stability (no color fading)
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Minimal maintenance — just wash occasionally with mild soap and water
The main difference is in cleaning accessibility:
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Blade fences have deeper gaps and may trap more dust or debris.
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Slat fences are flat-faced and easier to clean with a cloth or hose.
Both last 15–20+ years with proper installation.
5. Cost & Installation Comparison
One of the biggest practical questions: How much does it cost to install blade vs slat aluminum fence per metre?
While pricing depends on the supplier and project specifics, the general rule holds:
| Factor | Blade Fence | Slat Fence |
|---|---|---|
| Material Use | Heavier blades, stronger rails | Lighter slats |
| Fabrication | More complex welding and alignment | Simpler welding or panel system |
| Average Cost (Installed) | $350 – $550 per metre | $280 – $400 per metre |
| Installation Time | Longer | Quicker |
Prices based on Melbourne averages, 2025 estimates.
Why the price difference?
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Blade fences use heavier sections, stronger posts, and custom fabrication.
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They also need reinforced rail systems for stability.
If your project requires front boundary appeal and high privacy, blade fencing is worth the investment. For larger perimeters or garden dividers, slat fencing provides a cost-effective yet stylish option.
Read more: [Updated 2025] How Much Does Aluminium Fencing Cost?
6. Where Each Fence Type Works Best
Vertical Blade Fence – Best For:
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Front boundary fences
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Modern architectural homes
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Areas facing public streets or driveways
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Projects needing privacy and bold design
Vertical Slat Fence – Best For:
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Side and rear fencing
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Pool and garden enclosures
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Courtyard partitions and outdoor screens
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Homes wanting softer aesthetics and airflow
7. Aesthetic Comparison: Depth vs Flatness
Think of it like this:
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The blade fence plays with light and shadow, giving depth and strong presence.
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The slat fence is flat, linear, and calm, integrating more naturally with landscaping.
From a design perspective:
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Blade = architectural statement
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Slat = architectural harmony
8. Environmental & Climatic Performance
In climates like Melbourne — with hot summers, cool winters, and variable humidity — both options perform well.
Blade fences block more wind and sun (adding privacy and shade), while slat fences allow natural cross-ventilation, ideal for garden airflow and pool zones.
Performance & Engineering Insights
When comparing an aluminium vertical blade fence and an aluminium vertical slat fence, the real differences go beyond appearance. Their structure, wind behavior, and installation precision each affect how the fence performs over time.
1. Wind Load & Structural Stability
- Blade fences have wider upright surfaces that catch more wind, so their posts and rails need to be stronger and better anchored.
- Slat fences, especially the flat-faced welded type, allow more air to pass through the gaps, reducing overall pressure.
However, when slats are installed with very tight spacing, the performance gap between the two becomes smaller.
2. Thermal Expansion & Flexibility
Aluminium naturally expands and contracts with temperature changes.
- Blade fences, with thicker profiles, require careful design for this movement — often using slotted fixings or expansion joints.
- Slat fences, with their slimmer and lighter sections, handle temperature shifts more flexibly and are less likely to warp or stress over time.
3. Fabrication & Installation Precision
Because blade fences rely on perfect vertical alignment, even small deviations can be noticeable. They need precise fabrication and installation.
Slat fences are more forgiving; the flat-faced, closely spaced design helps hide minor irregularities, making installation faster and easier.
4. Durability, Warranty & Value
Both systems are made from powder-coated aluminium, offering corrosion resistance, UV stability, and low maintenance for years.
Most manufacturers provide 10–15-year warranties.
While blade fencing costs more upfront, it often increases property value thanks to its bold architectural appeal.
Slat fencing remains a cost-efficient option that still delivers modern aesthetics and long-term durability.
In short:
Both fences perform exceptionally well in Australian conditions.
Choose blade fencing for strength and statement design — or slat fencing for flexibility, airflow, and ease of installation.
Pros & Cons (Blade vs Slat)
Let’s lay out a side-by-side comparison to crystallize the decision.
| Feature / Factor | Blade Fence | Slat Fence |
|---|---|---|
| Visual Impact | Bold, monolithic, strong presence | Lighter, rhythmic, linear elegance |
| Privacy | High by default | Depends on spacing; adjustable |
| Security / Anti-Climb | Strong (fewer handholds) | Moderate; may require smaller slats or less spacing |
| Weight & Structural Demands | Heavier, more demanding on posts/rails | Lighter, more forgiving structure |
| Cost | Usually higher per metre | Often more economical (all else equal) |
| Adaptability to slope | More challenging | More flexible / rackable |
| Maintenance | Slightly more careful cleaning in gaps | Easiest maintenance |
| Architectural Accent | Excellent for frontage or statement zones | Great for modular zones, internal fences |
| Flexibility / Transparency | Less | More adjustable openness |
Tips for Choosing the Right Aluminium Fence for Your Home
Selecting the right aluminium fence isn’t just about looks — it’s about matching the design, privacy level, and structural requirements to your property’s purpose and environment.
Here are some expert tips to help you choose and specify your aluminium vertical blade or slat fence with confidence.
1. Define Your Priorities First
Decide what matters most — privacy, airflow, or visual appeal.
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Go with vertical blade fencing if you want strong privacy and a statement façade.
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Choose flat-faced slat fencing if you prefer light, airflow, and an open, modern look.
2. Consider Your Site Conditions
Wind exposure, slope, and ground type all influence fence design.
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In windy or exposed areas, choose stronger posts and rails (especially for blade systems).
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For sloping blocks, slat panels adapt more easily to gradients and uneven terrain.
Read more: Which Fence Types Hold Up in Strong Winds?
3. Balance Privacy and Light
The wider and closer your blades or slats, the more privacy you’ll gain — but the less airflow and sunlight you’ll have.
Test sample panels on-site to find your ideal spacing before final fabrication.
4. Match the Fence to Your Architecture
Your fence should complement the property, not compete with it.
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Blade fences pair beautifully with bold, contemporary homes.
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Slat fences suit light, minimalist façades and landscaped settings. Color-match powder coating (e.g., Monument, Surfmist, or woodgrain tones) for a cohesive exterior palette.
5. Check Local Regulations
Before finalizing your design, review local council or pool-fence regulations.
Height limits, gap spacing, and visibility rules can affect your chosen profile — especially for pool fencing and front boundaries.
6. Think Long-Term Durability
Specify marine-grade powder coating if you’re near the coast.
Opt for welded panels or reinforced corner joints to withstand weather and daily use.
A small upgrade now can save on future maintenance.
7. Plan for Gates and Automation Early
If your fence includes a driveway or pedestrian gate, design it at the same time as your panels.
This ensures consistent blade or slat spacing and simplifies future gate automation (swing or sliding systems).
8. Ask for Detailed Shop Drawings
Always request fabrication drawings showing:
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Blade/slat spacing and dimensions
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Post locations and footing depth
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Mounting methods and fixings
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Accurate specs prevent costly on-site adjustments.
9. Don’t Overlook the Finish
A high-quality powder-coated finish not only improves durability but also defines your fence’s look.
Choose finishes rated for UV and coastal exposure, and confirm the color warranty with your supplier.
10. Get Professional Advice
Every property is unique. A professional installer can assess site conditions, recommend profiles, and calculate the right post size and footing for your soil type and wind zone.
Bottom line:
A well-specified fence lasts longer, performs better, and looks more cohesive with your property.
Whether you choose the sculptural vertical blade system or the sleek flat-faced slat design, careful planning ensures your fence is as functional as it is beautiful.
Addressing Common Questions About Aluminium Blade vs Slat Fencing
Homeowners and builders often ask the same key questions when deciding between aluminium vertical blade fencing and aluminium vertical slat fencing.
Here’s a clear, practical breakdown of the most common topics — from privacy and cost to durability and maintenance.
1. How Do Blade and Slat Fences Actually Differ?
At a glance, both look modern and vertical — but structurally they’re quite different.
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Blade fences use wide, upright blades mounted at a 90° angle to the rails. They look bold and solid, almost architectural.
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Slat fences use flat, parallel aluminum slats welded flush between rails, creating a lighter, smoother façade with adjustable spacing.
In short: Blade fencing feels strong and enclosed; slat fencing feels open and breathable.
2. Which Fence Offers Better Privacy?
If privacy is your top concern, blade fencing wins. Its thick, upright blades block direct sightlines — especially when spaced tightly or offset. Some designs even angle the blades for one-way visibility: you can see out, but others can’t see in.
Slat fences can achieve moderate to high privacy too, but only when gaps are minimal (around 5 mm or less). Wider gaps increase airflow but reduce screening.
3. What’s the Cost Difference per Metre?
Blade fencing generally costs 10–30% more per linear metre than slat fencing. That’s because it uses heavier material, stronger rails, and tighter fabrication tolerances.
Slat fencing is more economical for the same height and coverage, unless you choose custom colors, tight gaps, or complex welded patterns. Always confirm whether quotes include post reinforcement and footings, as these can affect final pricing.
4. Which Type Works Best in Modern Homes?
Blade fences make a strong architectural statement — ideal for front boundaries, entry façades, or high-privacy zones. They also provide excellent anti-climb strength, thanks to their flat, upright edges.
Slat fences fit beautifully around gardens, pools, and side boundaries, where you want a relaxed, breathable look and plenty of natural light.
5. How Do They Perform in Melbourne’s Climate?
Both systems perform exceptionally well in Melbourne’s mixed climate. Made from powder-coated aluminum, they resist rust, UV fading, and moisture far better than timber or steel.
That said, blade fences—with their thicker profiles—handle strong winds and impact slightly better, while slat fences allow greater airflow and temperature balance.
6. Which Fence Is More Secure?
For security and anti-climb performance, vertical blade fences come out ahead. Their wide, upright blades leave fewer handholds, making it difficult to scale.
Slat fences, though sturdy, have slimmer sections and can offer more grip points — suitable for residential properties but less for high-security perimeters.
7. What’s the Ideal Slat Spacing for Privacy and Airflow?
The right spacing depends on how much privacy and light you want:
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10–20 mm: Moderate privacy with good airflow
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20–30 mm: Semi-private, decorative look
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< 5 mm or overlapping: High privacy, limited airflow
Always check local pool or council regulations — spacing rules may apply for safety compliance.
8. How Easy Are They to Maintain?
Both systems are low-maintenance compared to wood or steel. Just rinse with water every few months and use a mild soap if needed. Inspect fasteners annually and touch up any chips in the powder coating.
- Blade fences may collect dust or leaves between the upright fins — a quick brush or low-pressure rinse usually solves it.
- Slat fences are flatter and easier to wipe clean.
9. Can You Combine Blade and Slat Panels?
Absolutely — mixing both is common in modern designs. Use blade panels for front or high-privacy zones and slat panels around gardens or pools for a softer, open feel.
To keep the look cohesive, use the same post and rail system, color, and finish across all panels.
10. Are Blade Fences Better for Street Frontages?
Yes — their bold, upright design gives your property strong curb appeal and visual privacy from passersby. The thicker blades also cast distinctive shadows throughout the day, adding depth and texture to your façade. Many homeowners integrate lighting or signage directly into these panels for a seamless architectural finish.
Conclusion & Recommendation
The difference between an aluminium vertical blade fence and an aluminium vertical slat fence isn’t about which is “better” — it’s about which is better for you.
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Choose blade fencing if you want maximum privacy, security, and a bold architectural statement.
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Choose slat fencing if you prefer openness, airflow, and adaptable modern design.
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Or, mix both to define zones: blade for the front, slats for the sides and garden.
No matter your choice, both vertical fencing solutions share aluminium’s unbeatable benefits: durability, low maintenance, and lasting modern style.
If you’re in Melbourne or across Victoria, talk to a trusted installer like Pentagon Fencing & Gates for tailored advice on design, cost, and compliance. Their team specializes in both blade and slat aluminium fencing systems and can help you visualize which option fits your property best.
