Shipping Containers

Why InSoFast insulation for containers?

There are many ways to insulate and frame in a shipping container.  InSoFast has a full line of injection molded, closed-cell insulation panels that helps to control cold surface condensation. InSoFast panels give you the versatility to insulate on the interior, exterior or even both sides of a container. InSoFast provides insulation solutions that can be tailored to any climate. We offer different methods and thoughts on the best and correct way to insulate a shipping container. Our instructional videos demonstrate approaches that work and we make it look easy, after all we are skilled professionals with years of experience. It is for you to decide which one of our systems is the right one for you.

Is Condensation a Problem?

InSoFast is a high performance injection molded, closed cell, insulation panel that helps control cold surface condensation. In traditional home construction, water vapor is controlled by various means, like air leakage through the building’s envelope. Containers cannot rely on air leakage to control humidity; unlike frame construction, shipping containers are airtight.

For example, if you pull an ice-cold drink out of a foam cooler on a humid summer day, you will almost immediately notice condensation forming on the sides of the can. This is exactly what happens to the cold walls of a container. Warm air meets cold can causing (condensation). If you take the same insulation from a foam cooler and you wrap it onto a shipping container wall, condensation is controlled.

Coolers & Containers

A common use of Expanded Polystyrene is for safely transporting perishable food items and medical supplies. EPS is used for ice chests, foam coolers, and the manufacturing of EPS is held to very high standards of quality and safety. Independent Testing Laboratories have clearly proven the effectiveness and temperature protection you should expect from thick-walled ice chests. InSoFast simply applies a proven technology for you and your shipping container conversion projects. However insulation is only a part of any comprehensive approach to controlling indoor air quality:

Preventing Moisture Buildup

Occupants breathing, showering, and cooking all produce excess moisture in traditional home construction. Water vapor can be controlled by various means; the most basic is air leakage through the building’s envelope. Containers cannot rely on air leakage to control humidity, unlike frame construction, shipping containers are airtight. To prevent excessive moisture buildup that can lead to condensation, a proper mechanical ventilation system to remove moisture and a supply of fresh air is still an important design element. To minimize wintertime condensation on windows or cold surfaces, you must lower the relative humidity of the air to keep it below the dew point of the surface.

  1. A steel container is airtight, to prevent excessive moisture/condensation, a proper mechanical ventilation systems to control moisture and a supply of fresh air, is still an important design element.
  2.  Dew Point Calculator

InSoFast has applications in places ranging from the jungles of Africa, to the Arctic Circle; we are pretty sure that our insulation will work just fine for you. 

Energy Codes

Building codes and R-Values requirements are designed for traditional framed construction. Shipping container are not traditional. While codes are well-intentioned, they don’t consider the airtight and diminutive size of a shipping container. Local townships will hold container construction to a higher standard, because it is different. InSoFast has information available to help you navigate your local requirements.

Interior Space

It’s easy to increase your R-Value beyond code minimums while maintaining the engineered benefits and maximum interior space with InSoFast panels. InSoFast lets you balance high performance wall insulation against the need for valuable interior LIVING space. For more information about "Space vs. R-Value" go to our InSoFast PLUS page.


InSoFast take a complex assembly and makes it simple. Why work so hard? The family of products like the CX 44, CX LowPro Insulated Studs, and our other panels takes the hassle out insulating and framing shipping containers.

    • R-11 wall panel
    • Built in framing
    • Continuous insulation
    • Built in service raceways
    • Fast universal and simple
    • Insulation designed to fit containers.
    • Universal insulation for floor, walls, ceilings, interior and exterior


When environmental disasters force cities, islands and countries to declare that there is a “ basic shelter and low income housing crisis” up-cycling or recycling shipping containers is a sensible solution. InSoFast is the easy way to turn cold, corrugated steel containers into cozy and safe homes. InSoFast is so easy that professional builders and volunteers can work together to construct housing for homeless and other at-risk residents.

    • No electrical guess work
    • One detail, one solution . . . unlimited finishing options
    • Less parts and pieces = less training
    • Engineered components = a complete wall
    • Assemble Less. Build Better. Get more done.
    • Controls condensation behind the walls

Suggested products for Shipping Container Builds

Order a Sample Pack

All containers vary in size and dimensions, so it is best to invest in a sample kit to see which application method best suites your application. See if InSoFast is right for your project. We refund the purchase price of a sample pack when projects are over $1000.00

(Sample credits are not available for International orders, Canada, Mexico, Alaska and Hawaii and include additional freight charges.)  See our policy page for more details.

InSoFast Plus Method

Need a higher R-value? No Problem! Start with a base of InSoFast continuous insulation panels they are feature-rich and easy to install. Then add rigid foam insulation over top of InSoFast panels.