Do Shipping Containers Need Spray Foam Insulation Fabrication?

Spray Foam Insulation Fabrication for Shipping Containers: Is It Needed?

Key Takeaways

• Spray foam insulation provides a superior R-value for effective temperature regulation.
• Closed-cell spray foam is preferred for shipping containers due to its density and moisture control properties.
• Spray foam insulation can reduce long-term maintenance costs by improving energy efficiency.
• Conexwest provides customized spray foam insulation solutions for both new and used shipping containers.

What is Spray Foam Insulation?

Spray foam insulation, also known as spray polyurethane foam (SPF), is a modern insulation material that provides both thermal insulation and air sealing capabilities. It is created through a chemical reaction between two primary components: polyol resin and isocyanate. 

When these components are mixed, they expand rapidly and harden into a solid foam that fills gaps, cracks, and cavities in structures to provide a highly effective barrier against air and heat transfer.

Types of Spray Foam Insulation

Spray foam insulation consists of two main types: open-cell and closed-cell. Open-cell foam is less dense and has a spongy texture, which makes it suitable for soundproofing and interior applications. 

Closed-cell foam, on the other hand, is denser and more rigid, providing better insulation and moisture resistance. For shipping containers, closed-cell spray foam is usually the go-to choice due to its superior properties.

Get a quote 

When You Need Spray Foam Insulation

Spray foam insulation creates an air-tight seal to prevent air leaks.

1. Temperature Control: Shipping containers are made of steel, which can lead to extreme temperature fluctuations inside. If the container will be used for living, working, or storing temperature-sensitive items (like electronics or perishables), spray foam insulation is essential to maintain a stable internal environment. It helps keep the interior warm in winter and cool in summer to improve energy efficiency and comfort.
2. Moisture Prevention: Containers are prone to condensation due to their metal walls. Spray foam insulation, particularly closed-cell foam, acts as a vapor barrier to prevent moisture buildup that can lead to rust and damage to the contents.
3. Structural Integrity: In cases where the shipping container is repurposed for more than just storage (e.g., as a mobile office or living space), spray foam can improve the structural strength of the container. Closed-cell foam, in particular, adds rigidity to the walls and makes the container more durable and capable of withstanding external pressures.

When You Do Not Need Spray Foam Insulation

1. Basic Storage Needs: If the shipping container is solely used for storage of non-sensitive items that are not affected by temperature or humidity, insulation may not be necessary. 
2. Cost Considerations: Spray foam insulation can be costly due to the materials and professional installation required. If budget constraints are significant and the container’s use does not demand insulation, alternatives like fiberglass or simply leaving the container uninsulated should be considered.
3. Short-Term Use: For temporary projects or short-term storage, where the container will not be used for extended periods, investing in spray foam insulation may not be justified.
4. Non-Climate Sensitive Applications: If the shipping container is used in a controlled environment or is not subject to significant temperature variations (such as being placed indoors), insulation may not be necessary. For example, a container used for tool storage in a garage may not need insulation if the garage itself is climate-controlled.

Advantages of Using Spray Foam Over Other Insulation Methods

1. Superior Thermal Resistance: Spray foam insulation provides a high R-value. This high thermal resistance helps maintain a stable internal temperature and reduces the need for heating and cooling systems.
2. Airtight Seal: One of the standout features of spray foam insulation is its ability to create an airtight seal. It expands upon application, filling every nook and cranny, which prevents air leaks that can lead to temperature fluctuations and energy loss.
3. Moisture and Condensation Control: Spray foam, especially closed-cell foam, acts as a vapor barrier, effectively preventing moisture buildup and condensation inside the container. Traditional insulation methods, like fiberglass, often leave gaps that can trap moisture.
4. Structural Integrity: Spray foam insulation adds rigidity to the container’s walls to improve its structural integrity. This is particularly important for containers repurposed as living spaces or offices, where additional strength is beneficial.
5. Application Versatility: Spray foam can be applied in various configurations and thicknesses, which makes it suitable for both standard and irregularly shaped surfaces. This adaptability allows for effective insulation in tight corners and complex areas that other materials may struggle to cover adequately.
6. Longevity and Durability: Spray foam insulation is a long-lasting solution with a lifespan that can exceed 80 years when properly installed.
7. Noise Reduction: In addition to thermal insulation, spray foam also provides soundproofing benefits. It dampens sound transmission to create a quieter internal environment, which is advantageous in urban or noisy industrial settings.

How Conexwest Can Help with Shipping Container Fabrication

Conexwest’s experienced technicians provide a wide range of shipping container fabrication options, including insulation.

1. Expertise in Customization

Whether you want to add windows, doors, electrical systems, or insulation, we can transform your container into a functional space created just for you. Our extensive experience in container modifications means we can help you visualize and realize your ideas effectively.

2. Quality Assurance

We use durable materials that withstand the test of time, and we back our containers with a warranty to provide you with peace of mind regarding your investment.

3. Fast and Efficient Service

We have streamlined our fabrication process for quick turnaround times without compromising quality. Our nationwide network allows us to deliver your customized container efficiently, so you can start using it as soon as possible.

4. Transparent Pricing

We believe in providing clear and upfront pricing. With us, you won’t encounter hidden fees or surprises. 

5. Comprehensive Solutions

From storage solutions to living spaces, we provide a wide array of container types and modifications. Whether you need a simple storage unit or a complex, insulated workspace, we have the expertise and resources to meet your requirements.

If you are ready, don’t hesitate to reach out to us to get a free quote for your project.

Get a quote  

Frequently Asked Questions (FAQs)

How long does the insulation process take?

The insulation process typically takes one to two days, depending on the size of the container and the complexity of the project. Our team works efficiently for minimal disruption to your schedule.

Can spray foam insulation be applied to used containers?

Yes, spray foam insulation can be applied to both new and used containers. However, it's essential to keep the container clean and free of rust or other contaminants before the insulation process begins.

Can I install spray foam insulation myself?

It is not recommended to install spray foam insulation as a DIY project. The installation requires specialized equipment and training for safety and effectiveness. 

Is spray foam insulation waterproof?

It depends on the type of foam. Closed-cell spray foam is water-resistant, while open-cell foam is not. High-density closed-cell foam can be considered waterproof, which makes it suitable for areas prone to moisture.

What types of containers does Conexwest sell?

We sell a variety of shipping containers, including:

1. Standard Dry Containers: Ideal for general storage needs.
2. Refrigerated Containers: Perfect for transporting perishable goods.
3. High Cube Containers: Providing extra height for larger items.
4. Modified Containers: Customized for specific applications, such as offices or retail spaces.
5. Specialty Containers: Including hazardous material containers and ISO tanks.