Which insulation material is best for building steel structure hangar?

For most modern steel structure hangar projects, polyurethane sandwich panels (PU sandwich panels) and rock wool sandwich panels are widely used and have good comprehensive performance as insulation material.

With the development of the global aviation industry, private aircraft, general aviation, and aircraft maintenance services, steel structure hangars, due to their large spans, high space utilization, and rapid construction, have become the preferred building type for an increasing number of airports, airlines, and private flight bases.

As a crucial space for the long-term parking, maintenance, and repair of aircraft, hangars place higher demands on their enclosure systems. Choosing the right insulation material not only affects the hangar’s internal environment but also relates to aircraft maintenance costs and the building’s long-term operational efficiency.

Why do steel structure hangars need insulation systems?

Hangers typically have the following characteristics:

• Large building area
• High interior ceilings
• Large door openings
• Significant impact from temperature fluctuations

Without a good insulation material, the following problems can easily occur:

• Large indoor temperature fluctuations
• Increased energy consumption for air conditioning or heating
• Moisture affecting aircraft equipment
• Instantaneous maintenance environment

Therefore, modern steel structure hangar usually employ a combination of a steel structure main body and an insulated sandwich panel enclosure system.

1. Polyurethane Sandwich Panels (PU)

Polyurethane sandwich panels are currently a widely used high-performance insulation material in industrial buildings.

Its characteristics:

✅ Excellent thermal insulation performance

✅ Low thermal conductivity

✅ Lightweight

✅ High installation efficiency

For hangars requiring controlled indoor temperature, such as:

• Aircraft maintenance centers
• Business jet hangars
• High-end private hangars
• Aviation manufacturing auxiliary workshops

PU sandwich panels can reduce indoor heat exchange and improve energy efficiency. This is especially beneficial in cold regions of North America, winter-climate regions of Europe, and hot regions of the Middle East. Good thermal insulation performance can help reduce long-term operating costs.

2. Rock Wool Sandwich Panels

Aerospace buildings have high safety requirements, therefore, some hangar projects place greater emphasis on fire resistance.

Rock wool sandwich panels have:

✅ Class A fire resistance

✅ Good thermal insulation performance

✅ Good sound absorption

Suitable for:

• Aircraft maintenance workshops
• Aviation equipment warehouses
• Large airport hangars
• Projects with high fire resistance requirements

For airports and aircraft maintenance companies, fire safety is often a crucial factor in material selection.

3. Are EPS sandwich panels suitable for hangars?

EPS sandwich panels are economical, easy to install, and provide good basic insulation, thus they are also used in some general industrial buildings. However, for large steel structure hangars, careful selection based on project requirements is necessary.

If the hangar is mainly used for general aircraft parking, is a non-temperature-controlled space, or is a budget-controlled project, EPS panels can be an economical solution.

However, if the project involves aircraft maintenance, temperature control, or high safety requirements, PU or rock wool sandwich panels are generally recommended.

How to Choose Insulation Materials for Different Hanger Types?

With the continuous development of the aviation industry, global customers’ demands for hangars have shifted from simply providing parking space to:

• Better energy efficiency
• A more stable indoor environment
• Lower maintenance costs
• A longer building lifespan

Therefore, future steel structure hangars not only require a robust main structure but also a more efficient enclosure insulation system.

Canglong Group Provides Customized Steel Structure Hangar Solutions

For global aviation building needs, Canglong Group offers:

✅ Steel structure hangar design

✅ Large-span portal frame structure

✅ H-beam steel main structure system

✅ PU/EPS/rock wool sandwich panel solutions

✅ Aviation-specific door configuration

✅ International transportation and installation guidance

We provide more economical, safe, and efficient hangar construction solutions based on different national climate conditions, aircraft types, and customer usage requirements.

Choosing the right insulation material is a crucial step in building a high-performance steel structure hangar. For global aviation customers, a good hangar not only protects aircraft but also reduces long-term operating costs.