top of page

Best Practices for On-site Storage of Polyester Powder Coated Aluminium


House under construction. Building materials are on pallets ready for use.

In the realms of construction and architectural design, the use of Polyester Powder Coated (PPC) aluminium stands as a testament to modern engineering and aesthetic finesse. Renowned for its durability, versatility, and striking finishes, PPC aluminium is a staple in contemporary building projects, be it for cladding, roofing, or decorative features. However, the true potential of these materials is fully realised only when they are properly cared for, right from manufacturing to installation.


One critical aspect that often gets overlooked in the hustle of a construction site is the on-site storage of these materials. Improper storage can lead to diminished quality, affecting both the material integrity and aesthetic value. We will shed light on the best practices for the on-site storage of PPC materials, ensuring that their quality and longevity are preserved from the warehouse to the worksite. Understanding the sensitivity of these materials to environmental factors and physical impacts is crucial for any professional in the construction industry. By adhering to recommended storage guidelines, we can safeguard the aesthetic appeal and structural integrity of PPC materials, ultimately contributing to the success and longevity of building projects.


Understanding Polyester Powder Coated (PPC) Materials

Polyester Powder Coating (PPC) is a process that has revolutionised the finishing of metal surfaces, particularly in construction and architectural applications. This section delves into the nature of PPC materials, their properties, and why they have become a preferred choice in the building industry.


The Basics of PPC Materials:

  • Definition and Process: Polyester Powder Coating involves applying a free-flowing, dry powder onto metal surfaces. The powder is typically electrostatically charged and cured under heat, creating a "skin" that covers the metal.

  • Materials Commonly Coated: PPC is widely used on aluminium, steel, and other metals, enhancing both their visual appeal and functional characteristics.

Advantages of PPC in Construction:

  • Durability: PPC materials are known for their resistance to fading, chipping, and scratching, making them ideal for exterior applications.

  • Aesthetic Versatility: With a broad spectrum of colours and finishes available, PPC allows for creative freedom in design. The finish can range from matte to glossy and can include textures for added visual interest.

  • Environmental Resistance: These coatings are highly resistant to corrosion, weathering, and UV rays, ensuring long-term performance in various environmental conditions.

  • Eco-Friendly: Unlike liquid paints, PPC does not contain solvents and releases negligible amounts of volatile organic compounds (VOCs), making it an environmentally friendly option.

Applications in Building and Architecture:

  • PPC materials are extensively used for window frames, door frames, fascia, cladding panels, wall coping, gutters and downpipes, and architectural features.

  • Their application extends to both functional and decorative elements, showcasing how aesthetic appeal can go hand in hand with durability.

Innovation and Quality Assurance:

  • The PPC process has evolved with technological advancements, leading to improved quality and application techniques.

  • Quality assurance is a critical aspect, with coatings typically undergoing rigorous testing for adherence, thickness, gloss, and colour.

In summary, Polyester Powder Coated materials offer a unique combination of durability, aesthetic versatility, and environmental resistance, making them a highly valued component in modern construction and design. Their application not only enhances the visual appeal of structures but also contributes significantly to their longevity and sustainability. Understanding these materials is the first step in ensuring their optimal use and maintenance in various building projects.


Risks of Improper Storage of PPC Materials

While Polyester Powder Coated (PPC) materials are celebrated for their resilience and aesthetic appeal, their longevity and finish can be significantly compromised by improper storage. This section highlights the risks associated with the incorrect handling and storage of PPC materials on construction sites, emphasising the importance of adhering to best practices.


Risks Include:

  • Moisture and Water Damage: PPC materials wrapped in polythene are susceptible to blanching when exposed to moisture for prolonged periods. This can lead to a whitish bloom on the surface, diminishing the visual quality of the finish.

  • Corrosive Substances: Exposure to harsh chemicals or pollutants can corrode the PPC layer, leading to deterioration of both the aesthetic and protective properties of the material.

  • Run-off from Other Materials: Certain materials, like treated wood, can release substances that may stain or damage the PPC coating.

  • Condensation Under Covers: Improperly covered PPC materials can trap moisture, leading to condensation and subsequent water damage.


Understanding these risks is crucial in preventing damage to PPC materials. The subsequent sections will provide detailed guidelines on how to mitigate these risks through effective storage practices, ensuring that the PPC materials maintain their intended quality and finish throughout the construction process. By recognising and addressing these potential issues, professionals can safeguard the integrity and appearance of their PPC materials, ultimately contributing to the success and aesthetic appeal of their projects.


Best Practices for On-site Storage of PPC Materials

Proper storage of Polyester Powder Coated (PPC) materials is vital for maintaining their quality and longevity. This section outlines key strategies for effective on-site storage, aimed at protecting these materials from environmental and physical damage.

Appropriate Covering for Outdoor Storage:

  • Use of Protective Covers: When storing PPC materials outside, it's essential to cover them with waterproof and breathable tarpaulins. This protects against rain, snow, and direct sunlight while allowing moisture to escape, preventing condensation.

  • Elevate from Ground: Keep materials off the ground using pallets or supports to avoid water damage and reduce the risk of soil contamination.

Safe Positioning to Avoid Physical Damage:

  • Away from Construction Traffic: Store materials in a location where they are safe from accidental impacts or construction debris.

  • Proper Stacking: Ensure that PPC materials are stacked horizontally and evenly. Use spacers between stacks to maintain airflow.

Protection from Water Ingress:

  • Sealed Protective Wrapping: If materials come in protective polythene wrapping, keep this intact as much as possible. In case of tears or openings, seal them promptly to prevent water ingress.

  • Inspect Regularly: Regularly check for any signs of water penetration, especially after heavy rain or snow.


Handling Chemicals and Other Materials:

  • Safe Distance from Chemicals: Store PPC materials away from chemicals, solvents, and other substances that could cause corrosion or staining.

  • Prevention of Staining: Be cautious of potential run-off from other materials, such as certain woods, that could stain the PPC surface.

Organisation and Accessibility:

  • Easy Accessibility: Arrange materials in a manner that allows easy access without the need to move or restack them frequently.

  • Labelling for Efficiency: Clearly label each stack with information about the contents, which aids in quick identification and reduces unnecessary handling.


By adhering to these best practices, construction professionals can ensure that the PPC materials remain in pristine condition throughout the storage period. Proper storage not only preserves the material quality but also contributes to the overall efficiency and safety of the construction site. The subsequent sections will delve into specific issues such as dealing with water ingress and blanching, offering further insights into the meticulous care required for PPC materials.

Dealing with Water Ingress and Blanching in PPC Materials

Despite best efforts in storage and handling, Polyester Powder Coated (PPC) materials can sometimes be affected by water ingress and blanching. This section provides guidance on identifying these issues and the appropriate remedial actions to take.

Understanding Water Ingress and Blanching:

  • Water Ingress: This occurs when water penetrates the protective layers of PPC materials, often due to improper storage or damaged wrapping.

  • Blanching: A common consequence of water ingress, blanching is characterised by a whitish, opaque appearance on the coating, affecting its aesthetic appeal.

Identification and Assessment:

  • Regular Inspection: Frequently inspect stored PPC materials, especially after adverse weather conditions, for signs of water ingress or blanching.

  • Early Detection: Prompt identification is crucial as early stages of blanching can often be remedied more effectively.

Preventive Measures:

  • Immediate Action: Upon noticing water ingress, remove the source of moisture immediately and dry the affected area.

  • Proper Ventilation: Ensure the affected materials are stored in a well-ventilated area to facilitate drying.

Remedial Steps for Blanching:

  • Controlled Reheating: Controlled reheating can often reverse blanching. This involves gently heating the affected area to allow trapped moisture to escape. However, this should be done cautiously to avoid damaging the material.

  • What to Use: A hairdryer produces enough heat to lift the blanching from the powder coated material

Prevention of Recurrence:

  • Enhanced Storage Practices: Review and improve storage practices to prevent future occurrences. This includes ensuring that PPC materials are properly covered and stored away from potential water sources.

  • Educating Site Personnel: Train site staff on the importance of proper storage and handling of PPC materials to foster a culture of care and attention.


By understanding the risks of water ingress and blanching and taking proactive steps to address them, the integrity and appearance of PPC materials can be maintained. This ensures that the final construction meets both aesthetic and quality standards. The next section will provide additional tips for the storage and maintenance of PPC materials, further ensuring their preservation on construction sites.

Ensuring the Longevity and Quality of PPC Materials through Proper Storage

It's clear that the key to preserving their integrity and aesthetic lies in meticulous care and attention to detail. From understanding the nature and benefits of PPC materials to recognising the risks of improper storage, each section of this blog has highlighted crucial aspects that contribute to the longevity and quality of these construction essentials.


The effective storage of PPC materials is not just about preventing immediate physical or environmental damage; it's about upholding the standards of quality and aesthetics that define modern construction. By implementing the recommended storage practices, addressing issues like water ingress and blanching proactively, and embracing additional storage tips, professionals in the construction and architectural fields can ensure that PPC materials maintain their intended beauty and functionality throughout the lifecycle of a project.


Are you looking to enhance your building projects with top-quality PPC products? Explore Aluminium Rainflow's extensive selection of Polyester Powder Coated materials, including durable aluminium fascia and robust aluminium wall coping systems. Our range is designed to meet the highest standards of construction and architecture. Visit our website now to browse our products and elevate the aesthetic and functional aspects of your projects with our premium PPC solutions. Shop with us today and experience the difference in quality and performance!

Modern home with aluminium trims and a lush garden

bottom of page