Why Corrugated Iron Walls Fall Short in Vietnam

Why Corrugated Iron Walls Fall Short in Vietnam – and Why Sandwich Panels Are the Smarter Choice

In Vietnam, corrugated iron sheets are commonly used as wall materials for temporary housing, worker dormitories, and small warehouses. The reasons are simple: they are cheap, quick to install, and require low upfront investment.

At first glance, corrugated iron seems like a cost-saving option. But over time, its drawbacks become impossible to ignore:

• Extremely hot in summer: Corrugated iron absorbs heat quickly, turning the inside into an “oven” that is often hotter than the outdoor temperature.

• Cold in winter: With almost no insulation, thin metal sheets allow cold winds to pass through, making the space uncomfortable.

• Prone to rust: Vietnam’s humid and rainy climate causes iron walls to rust and corrode in just a few years, reducing both durability and appearance.

In other words, what looks affordable at first can result in higher energy bills, shorter lifespan, and poor comfort—hidden costs that outweigh the initial savings.

Sandwich Panels: The Comfortable, Durable Alternative

Instead of corrugated iron, sandwich panels (also called insulated panels) offer a smarter and more long-term solution. Made with two layers of steel and an insulating core material such as polyurethane (PU) or rock wool, they combine strength, insulation, and durability in one.

Here’s why sandwich panels outperform corrugated iron:

1. Cooler in summer, warmer in winter

   • The insulation core blocks heat radiation during the day and retains warmth at winter.

   • Compared to iron sheets, sandwich panel buildings maintain an indoor temperature that is 5–10°C lower in summer, creating a much more comfortable environment.

2. Rust-resistant and long-lasting

   • The steel surface is coated for corrosion resistance, keeping walls strong even in humid climates.

   • While iron walls may rust within a few years, sandwich panels typically last 15–20 years with minimal maintenance.

3. Energy-efficient and eco-friendly

   • Better insulation reduces the need for air conditioning and heating.

   • This saves electricity costs and reduces carbon emissions, making it a greener choice.

4. Modern appearance and flexibility

   • Sandwich panels come in various colors and finishes, offering a clean, professional look.

   • They can be used for worker dormitories, site offices, warehouses, or even commercial spaces without looking temporary or outdated.

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Where Sandwich Panels Work Best

• Worker dormitories: Provide laborers with safe, comfortable housing year-round, improving productivity and morale.

• Site offices and factories: Maintain a professional image while keeping staff comfortable in all seasons.

• Warehouses: Protect stored goods from excessive heat, humidity, and corrosion.

Final Thoughts

Corrugated iron walls may seem cost-effective in the short term, but in Vietnam’s hot and humid climate, they quickly reveal their weaknesses. Sandwich panels are a long-term investment, offering better comfort, durability, and energy efficiency—all while saving money in the long run.

If you are planning to build worker housing, offices, or warehouses, sandwich panels are the smarter and more sustainable choice.