Heavy-duty balconies are vital components of large structures, offering a space for leisure, relaxation, and appreciation of the surroundings. However, due to their exposure to various weather conditions and constant foot traffic, these balconies require robust protection to maintain their structural integrity and aesthetic appeal. In this blog, we will delve into the importance of protective coatings for heavy-duty balconies and the specific facilities required to handle the size and weight of these items. We will also explore the benefits of shot blasting, hot zinc spray, and powder coating as effective coating techniques.

Enhancing Durability

Shot Blasting: The First Step Towards Longevity

Shot blasting is a crucial process that prepares heavy-duty balconies for coating by removing impurities, rust, and old coatings from the surface. This technique involves propelling abrasive particles at high velocity onto the balcony’s surface, resulting in a clean, roughened substrate that promotes better adhesion of protective coatings. However, due to the large size and weight of these balconies, specialised facilities equipped with ample space, protective enclosures, and advanced machinery are essential for effective shot blasting.

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Hot Zinc Spray: Superior Finish for Enhanced Protection

While hot dip galvanising is a widely used coating method, hot zinc spray has emerged as an alternative technique that offers a superior finish for heavy-duty balconies. Hot zinc spray involves applying a layer of molten zinc onto the surface of the balcony, forming a metallurgical bond that provides excellent corrosion resistance. This process can be performed on-site, but for large balconies, it is more practical to conduct it in specialised facilities equipped with the necessary equipment and skilled professionals.

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Powder Coating: Aesthetic Appeal and Lasting Protection

Powder coating is a popular choice for heavy-duty balconies due to its exceptional durability, resistance to corrosion, and wide range of colour options. This process involves electrostatically applying a dry powder to the balcony’s surface, which is then cured in a large oven. The heat causes the powder to melt, flow, and fuse, forming a tough, protective coating. Given the size and weight of heavy-duty balconies, specialised facilities with large ovens capable of accommodating these items are essential for achieving optimal results.

Facilities for Handling Size and Weight:

Protective coatings for heavy-duty balconies require specialised facilities capable of handling the size and weight of these items. Key considerations include:

a) Spacious Workspaces: The facilities must have large working areas to accommodate the size and layout of heavy-duty balconies, allowing ample room for shot blasting, zinc spraying, and powder coating processes.

b) Advanced Shot Blasting Equipment: The facilities should be equipped with state-of-the-art shot blasting machines capable of handling large, heavy balconies efficiently. These machines should offer adjustable settings to accommodate different balcony sizes and surfaces.

c) Zinc Spraying Expertise: Facilities should have experienced professionals skilled in hot zinc spray techniques. They must be knowledgeable about the correct application temperatures, coating thickness, and proper surface preparation to ensure effective corrosion protection.

d) Oversized Ovens: To carry out powder coating, specialised facilities must possess large ovens that can accommodate heavy-duty balconies. These ovens should provide even heat distribution and precise temperature control to achieve a flawless and durable coating.

e) Handling and Transportation Equipment: Since heavy-duty balconies are cumbersome and require careful handling, the facilities should have appropriate lifting equipment, such as cranes or forklifts, to safely manoeuvre the items throughout the coating process.


Protective coatings play a vital role in enhancing the longevity, corrosion resistance, and aesthetic appeal of heavy-duty balconies. However, given the size and weight of these items, specialised facilities equipped with spacious workspaces, advanced shot blasting equipment, hot zinc spray expertise, oversized ovens, and appropriate handling and transportation equipment are necessary to achieve optimal results.

NSP Coatings offer all of the above and service a number of large construction and fabrication companies with their services. If you want to get a free quote for your next large industrial job, just speak to NSP Coatings today.