Most homeowners think there are two options. There are three.
Most homeowners begin a fence project assuming there are only two options — PVC or aluminum. In reality, aluminum fencing is divided into two very different categories: mechanical aluminum and custom welded aluminum. They’re both aluminum, but their appearance, fabrication method, applications, and pricing can be dramatically different. Understanding which of the three you’re actually comparing is the most important first decision.
The first question isn’t “PVC or aluminum?” — it’s which of the three categories fits your property, budget, and design intent. Almost everything that follows in this guide flows from that decision.
Mechanical vs custom welded aluminum.
Mechanical aluminum is assembled from prefabricated factory components: extruded pickets, rails, and posts joined with engineered fasteners. Quality is high, costs are reasonable, and the designs are standardized. Custom welded aluminum is fabricated from raw aluminum stock and built specifically for each project — cut, welded, sanded, finished, powder-coated. The result is unlimited design flexibility and an architectural look that no mechanical system can match.
Mechanical Aluminum
- Prefabricated extruded components
- Engineered fastener assembly
- Standardized picket profiles & spacing
- Faster manufacturing & installation
- Lower cost than custom
- Best for pool fencing, perimeters, classic looks
Custom Welded Aluminum
- Fabricated from raw aluminum stock
- Welded joints, seamless appearance
- Unlimited geometry, finishes, profiles
- Specialty powder coats & textures
- Higher cost — often 4–5× mechanical
- Best for architectural homes & modern designs
If you’ve seen a fence on a magazine-published home and thought “is that the same as the ornamental fence at my neighbor’s?” — the answer is usually no. Mechanical and custom welded are two different products at very different price points.
PVC, mechanical, and custom welded — side by side.
Twelve categories that decide which of the three fits a particular project. Each category wins different rows. What matters isn’t the overall column score — it’s which categories matter most for your property.
Each option wins in completely different categories. PVC owns privacy and budget. Mechanical owns pool compliance and visibility. Custom owns architectural design and any specialty look. None of the three is universally better.
Privacy — which fence screens?
Privacy is the single biggest functional difference between the three categories. PVC is the easy path to maximum privacy. Mechanical aluminum is deliberately see-through by design. Custom welded aluminum can be either, depending on what gets specified.
If privacy is the goal, PVC is usually the easiest path to it. If you want privacy with architectural character — horizontal slats, louvers, modern lines — custom welded aluminum can deliver it, at a meaningfully higher price point.
Appearance & design.
Three fences, three distinctly different design languages. Each one reads as something different from the street, in the yard, and inside the home. Most homeowners can rule one or two out in seconds once they see what each one actually looks like in context.
This is the most subjective category in the whole comparison. There’s no winner here — only a preference. Look at all three categories on real properties before deciding which one fits your home’s design language.
Understanding fence pricing.
The cost story is the single most consequential difference between the three categories. PVC and mechanical aluminum cluster in a similar budget range. Custom welded aluminum typically lives in a separate price tier — often 4 to 5 times higher per linear foot — because every gate, panel, and detail is fabricated to spec rather than assembled from inventory.
PVC & Mechanical Aluminum
- Comparable cost per linear foot
- Standardized profiles & fabrication
- Catalog-based pricing
- Faster lead times
- The default South Florida fence budget
PVC and mechanical aluminum sit in the same general budget range — the right one depends on whether you need privacy (PVC) or visibility (mechanical).
Custom Welded Aluminum
- Design & engineering hours
- Hand-fabrication from raw aluminum
- Welding, sanding, finishing
- Specialty powder coating
- Custom hardware & gate engineering
Custom welded typically costs 4–5× more per linear foot. The cost reflects design hours, fabrication labor, specialty finishes — not just material.
The honest question isn’t “which is cheapest?” — it’s “is this a luxury project or a practical project?” Custom welded aluminum delivers a result the other two categories simply can’t — and asks for the budget to match.
Pool & waterfront applications.
Two scenarios in South Florida tilt the answer strongly toward one of the three categories: pool enclosures and waterfront properties. In both, visibility and code compliance matter more than privacy — which makes mechanical aluminum the default. Custom welded is the luxury upgrade for the same use cases.
On pools and waterfront, mechanical aluminum is the default for the same reason: visibility plus a recognized code standard. PVC fits the patio side; custom welded fits a luxury upgrade.
Which fence offers the most design flexibility?
If design flexibility is what matters — custom heights, unique gates, integrated lighting, mixed materials, architectural details — the three categories rank in a clear order. Custom welded sits at the top, with PVC and mechanical aluminum below at similar levels for very different reasons.
If the fence is part of the architecture, custom welded is the right answer despite the cost. If the fence just needs to do its job, PVC and mechanical aluminum cover almost every real-world scenario.
Why many homeowners combine materials.
One of the smartest moves in residential fence design is recognizing that different parts of a property need different jobs done. Mechanical aluminum at the pool. PVC at the rear yard. Custom welded at the front entry. Same property, three different right answers.
You don’t have to pick one fence for the whole property. Different runs can solve different problems. Many of our best installs use two or three categories on a single lot.
Which fence is right for you?
Real decisions usually fit one of three homeowner profiles. Each profile maps cleanly to one of the three categories. The descriptions below cover the bulk of what we see in Broward and Palm Beach County.
Three homeowner profiles, three clean answers. Pick the profile that fits and the material decision is largely settled.
Decision tree & related guides.
Three honest questions usually point to the right category. The framework below is the one we walk through with homeowners on site visits when more than one option is on the table.
PVC vs aluminum, questions answered.
Is PVC cheaper than aluminum fencing?
PVC and mechanical aluminum generally sit in the same budget range — one isn’t reliably cheaper than the other. Specific styles and heights can tilt either way. Custom welded aluminum is in a separate, much higher price tier (typically 4–5× the cost of either) because every piece is fabricated to order.
What is mechanical aluminum fencing?
Aluminum fencing assembled from factory-extruded components — pickets, rails, posts — joined with engineered fasteners. It comes in standardized profiles (HR10, classic flat-top, spear-top, etc.) and is the industry-standard ornamental aluminum fence in South Florida.
What is custom welded aluminum fencing?
Aluminum fencing fabricated from raw aluminum stock and built specifically for each project. Pieces are cut, welded, sanded, finished, and powder-coated. The result is unlimited design flexibility — horizontal slats, louvers, laser-cut panels, oversized gates — in geometries no mechanical system can deliver.
Why is custom aluminum so much more expensive?
Because every aspect of it is built to spec: design work, fabrication labor, welding, hand-sanding, specialty powder coating, custom hardware engineering. Mechanical aluminum benefits from factory-scale assembly; custom doesn’t. The cost reflects the labor and design hours, not just the aluminum itself.
Which fence is best for privacy?
PVC is the easiest path to maximum privacy — solid panels with no visual gaps. Custom welded aluminum can achieve full privacy through horizontal slats, louvers, or perforated panels, at a luxury price point. Mechanical aluminum is intentionally see-through; it’s not a privacy fence.
Which fence is best around a pool?
Mechanical aluminum is the industry-standard pool barrier in South Florida — HR10 spacing meets Florida code, gates ship with self-closing and self-latching hardware. PVC is occasionally used on the patio side of pools but rarely as the code-enforced barrier. Custom welded can serve as a code-compliant pool barrier in luxury installs.
Which fence is best for a waterfront property?
Mechanical aluminum is the default on the waterfront side — it defines the property line without blocking the view that makes the home valuable. Custom welded is the luxury alternative for the same use case. PVC is generally avoided on the water side because it blocks the view.
Can aluminum fences provide privacy?
Standard mechanical aluminum doesn’t — the open picket spacing is the defining feature. But custom welded aluminum absolutely can: horizontal slats, louvers, perforated panels, and laser-cut screens can all deliver privacy ranging from semi-private to fully opaque. The trade-off is cost — you’re paying for a custom design solution.