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How Powder Coating Thickness Impacts Aluminium Fencing in Perth?

How Powder Coating Thickness Impacts Aluminium Fencing in Perth?
05 Aug 2026

Aluminium fencing, alongside Colorbond fencing, is a popular choice among Perth residents. This is because aluminium is durable, low-maintenance, and well-suited to the local climate. However, its longevity relies on more than the aluminium itself. A reliable fence needs to withstand harsh sunlight and coastal weather, which is why experienced fencing contractors in Perth areas pay close attention to the coating process, not just the final finish.

How Much Powder Coating Thickness Does Aluminium Fencing Need?

Powder coating is weighed in microns (µm). One micron is equal to one-thousandth of a millimetre. A coating thickness of 60-80 microns is commonly specified for architectural aluminium fencing.

If the coat is too thin, it wears down quickly. This exposes the aluminium underneath to environmental contaminants. It is prone to reduced flexibility and surface imperfections if it is too thick. Dependable fencing contractors install aluminium fences with consistent coating thicknesses.

Why Surface Preparation Matters More Than Coating Thickness Alone?

A thick coating is only effective when it bonds properly to the aluminium surface. Before powder coating starts, the aluminium must be thoroughly cleaned and pre-treated to clear oils, dirt, etc. Proper chemical pre-treatment enhances adhesion and allows the coating to form a protective layer.

Improper surface preparation effects in peeling or flaking over time. This is regardless of coating thickness. Application quality, hence, has a bigger impact on long-term performance than the coating’s appearance.

How Does Perth's UV Exposure Affect Powder-Coated Aluminium Fencing?


Perth gets high levels of ultraviolet radiation throughout the year. Repeated UV exposure slowly breaks down cheap coatings. This results in fading and lowered surface protection. High-quality powder coatings are made with UV-resistant resins and pigments that endure long hours of sunlight.

While colour fading often draws attention first, UV degradation also diminishes the coat’s protective performance when low-grade products are used. Professional Colorbond fencing contractors use powder-coated aluminium fencing in their installations. These coating systems meet recognised Australian durability standards for exterior applications in areas with great sun exposure.

People often assume that dark colours last long, or that light shades give better protection. In reality, colour has very little influence on how long the coating will perform. The factors that matter more are:

   • Proper coat thickness
   • Correct surface preparation
   • Even application across whole fence
   • Complete curing at recommended temperatures
   • High-quality powder made for outdoor use

Professionally applied coating in almost any colour generally outperforms poorly applied coats, any day.

How Does Coastal Salt Air Affect Aluminium Fencing in Perth?

Many properties across Perth are exposed to salty air. This is especially true for homes in coastal suburbs. Salt deposits gradually affect protective coatings if they wear down. A well-applied powder coating with maximum coverage prevents moisture and salt from reaching the aluminium surface.

Choosing an Aluminium Fencing Contractor in Perth

The finish deserves as much attention as the design itself when choosing aluminium fencing.  Proper powder coating thickness, along with other important factors, all lead to lasting performance. Experienced contractors focus on installing fences with proper finishing to help your investment last longer.

All Perth Fencing is a licensed contractor serving the Perth metropolitan area. We specialise in installing and repairing Colorbond and aluminium fences. Our fencing contractors are certified to handle all types of Colorbond and aluminium fencing systems. Stay tuned to our blog page for more information.

 

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