Closed Cell Spray Foam Insulation

Closed Cell Spray Foam Insulation for Shipping Containers

Closed-cell spray foam is one of the most effective ways to insulate a shipping container. Applied directly to the steel walls, cargo doors, and ceiling, it creates a seamless thermal and vapor barrier that helps control temperature, moisture, and condensation.

Choose between 2" or 3" insulation depending on how you plan to use your container.

Insulation Options

2" Closed Cell Spray Foam — Approximately R-12 to R-14
A great choice for workshops, storage, and most conditioned spaces. Provides excellent insulation while keeping cost down.

3" Closed Cell Spray Foam — Approximately R-18 to R-21
Recommended for offices, living spaces, and applications where maximum heating and cooling efficiency is important.

Closed-cell spray foam typically provides approximately R-6 to R-7 per inch.

Underfloor Insulation

Choose Interior + Underfloor for a more complete thermal envelope.

Underfloor spray foam helps:

• Reduce heat loss and heat gain through the container floor
• Keep floors warmer during cold weather
• Improve HVAC efficiency
• Reduce temperature differences between the floor, walls, and ceiling
• Improve comfort in offices and other regularly occupied spaces

For basic storage or applications where maximum climate control isn't necessary, interior insulation without underfloor foam may be sufficient.

Key Benefits

• Excellent thermal performance
• Helps prevent condensation and moisture buildup
• Creates a continuous vapor barrier against the steel
• Adds rigidity and sound dampening
• Reduces heating and cooling demand
• Ideal for offices, workshops, studios, conditioned storage, and other container conversions

Professional Installation

Best value when installed before your container is delivered.

Installation on an existing container or mobile/off-site installation may also be available. Additional travel or mobilization charges may apply.

Need more than 3" of insulation? Call or email us for pricing and recommendations.

Complete Your Build

We also offer framing, finished interior wall systems, electrical packages, HVAC, windows, doors, and other container modifications.

One Trip Containers

One Trip Containers have made only a single journey from the manufacturer to their destination, ensuring they are in excellent condition. These containers offer the highest quality and durability, with minimal wear and tear — perfect for transporting sensitive goods or converting into living or working spaces.

Cargo Worthy Containers

Cargo Worthy Containers are inspected and certified for cargo transport, meeting industry standards for shipping. They are robust and reliable, suitable for both storage and transportation needs.

Wind and Watertight Containers

Wind and Watertight Containers are inspected to ensure complete protection against the elements, keeping your belongings safe from wind, rain, and other environmental factors.

Refurbished Containers

Refurbished Containers have been carefully inspected and restored to a high standard, offering a cost-effective balance between quality and affordability.

"As Is" Containers

"As Is" Containers are sold in their current condition without any repairs, making them a budget-friendly option for non-critical storage where appearance and minor defects are not a concern.

Read the full container grades guide

Cascade Vaults Delivery Method

We use a truck with a tilt-bed trailer to deliver your container. Our skilled driver backs into the delivery spot, tilts the trailer, and carefully lowers the container into place. To ensure a smooth delivery, please provide enough clearance:

• 80 feet straight-line clearance for 10' or 20' containers.
• 120 feet straight-line clearance for 40' containers.

For hard-to-reach places, we offer crane services at an additional fee, ensuring your container is exactly where you need it.

Learn more about delivery options

About Cascade Vaults

Headquartered in Bend, OR, we set the industry standard for renting and buying shipping containers across the Pacific Northwest and beyond. With a steadfast commitment to exceptional customer service, we consistently prioritize our customers, ensuring easy purchasing and swift delivery processes.

Our outstanding reputation is backed by numerous 5-star Google reviews, attesting to our reliability and the quality of our service. Whether you're buying or renting, you can depend on us for the best storage solutions in the industry, all backed by a comprehensive 1-year warranty. With container depots nationwide, we proudly serve customers across the nation.

At Cascade Vaults, we focus on functionality and cost-effectiveness to efficiently meet all your storage needs. We are here to help — your satisfaction is our priority!