skip to content
40ft high cube storage container for sale

How to Insulate Shipping Containers

Introduction to insulating shipping containers

Fiberglass and foam are not the only options available for insulating shipping containers. You can also try Cork, Denim, Spray foam, or Perlite.

These natural resources have the same R-Value and can be used on the ceiling, walls, and floor of shipping containers. Wool is also a good choice because it allows air to circulate.

The lanolin contained in sheep wool is also a natural flame retardant.

Cork insulation

While spray foam is a great choice for insulation, there are a number of advantages to cork. For starters, it has an acoustic quality, creating a sound buffer. Metal walls of shipping containers easily transmit sound.

Wool, on the other hand, has a higher R-value than cork. Wool also has natural flame retardant properties, making it a good choice for shipping containers. In addition, cork insulation can be recycled.

Cork is an eco-friendly option and works perfectly as an insulator. If you prefer a more traditional option, spray foam can be a great choice as it doesn’t require framing and is faster to apply.

It can be a good choice if shipping containers are going to be stored in warm climates. It can be applied directly to the walls and ceilings of the container without any additional framing.

The downside of spray-on insulation is that it can only be 2.5 cm thick. Its insulating properties are comparable to those of a fiberglass or wool blanket.

Shipping containers with spray-on insulation are most likely used inside the walls, although some people prefer to cover the exterior with a barrier material.

Besides insulating, cork is also good for acoustics. It’s worth considering when building shipping containers.

Other eco-friendly options are cork, mud, and recycled cotton. Cork is also biodegradable and recyclable, which makes it an attractive choice for environmentally conscious shippers.

But don’t forget that cork does have its drawbacks. This article has outlined some of the benefits and downsides of using cork.

And if you’re looking for an environmentally-friendly, sustainable shipping container insulation option, consider cork!

Denim insulation

If you have a shipping container that needs to be insulated, you’re probably wondering how to insulate it with denim insulation.

This type of insulation is made from recycled textile fibers and is non-toxic, but it’s also thick and heavy, making it difficult to cut to fit. There are many alternatives, though.

Some people use foam board insulation, which is made from a blend of polystyrene, polyisocyanurate, and urethane. It comes in various thicknesses and lengths and requires some type of adhesive to stick to metal surfaces.

When used for shipping container insulation, denim is an excellent alternative to fiberglass. Its R-Value is 3.5 per inch and is comparable to traditional fiberglass insulation.

However, unlike wool, denim insulation isn’t naturally flame-retardant, so container home builders must plan accordingly. They should also plan on the fact that denim insulation will lose its insulation properties once wet.

Another alternative to foam board or fiberglass is recycled denim. This material is an effective insulator in extreme temperatures and is similar to traditional fiberglass insulation in its R-Value.

But beware: denim insulation is expensive and can irritate the skin. It’s also known to cause allergies. For that reason, many people avoid denim insulation in their shipping containers.

They’d rather invest in a more sustainable alternative.

If you want a more eco-friendly option for shipping container insulation, you can consider mineral wool. Like denim, mineral wool is a natural product that resists dampness.

You can install mineral wool in the same way, by cutting blocks of it and lining them along the walls and ceiling. You can even buy denim-based mineral wool that’s made from recycled cotton.

If you’re interested in avoiding harmful chemicals, denim insulation may be a great option. Many companies in Colorado, Pennsylvania, and Michigan are willing to install this kind of insulation.

Spray foam insulation

Spray foam insulation for shipping containers can be a great way to insulate your container and save money in the long run. The only downside is that it can be expensive, so you need to know the right amount of foam to use.

Before starting the process, you should make sure that your shipping container is clean.

Clean it with a simple detergent or get a professional to help. Then, measure the size of the container to determine the amount of foam you need. Then, cut the sheets to the correct measurements using a level and a marking pen.

Before you spray the foam insulation, you must complete the framing on the outside of the shipping container.

If you’re using open-cell foam, you need to make sure that the stud cavities are well-insulated before you start. You can also use house wrap or siding to protect the foam from moisture.

Spray foam insulation for shipping containers is a great way to insulate and protect your container. It's a great way to reduce the amount of heat transfer in a shipping container and save money on your heating and cooling costs.

There are several types of shipping container insulation that you can use. Spray foam is the easiest to install and will keep your shipping container warm in cooler months and dry in damp climates.

Spray foam will also combat condensation, as it creates a seamless vapor barrier. It’s flexible, too, so you can paint over it to achieve the desired look. The good news is that spray foam for shipping containers will last for many years.


Perlite is a type of rock that is produced in granular form. It is an excellent insulator and weighs only two pounds per cubic foot. Its properties are suited for use in cryogenic and low-temperature equipment, test chambers, and food processing applications.

It can withstand temperatures as low as four degrees Celsius (40 degrees Fahrenheit).

The glassy closed cellular structure of perlite makes it an excellent insulator, with low thermal conductivity and minimal combustibility.

Its lightweight insulating properties make it ideal for use in construction and horticultural applications. Perlite is used in bricks, lightweight concrete, and plasters.

Perlite is also a valuable filtration medium and can help reduce the temperature of a building.

Generally, shipping containers are constructed of two types of material: insulated walls and ceilings, and a layer of styrofoam is often used to provide general insulation.

If you need to insulate the walls and ceilings of a shipping container, Styrofoam can be used to limit the echoes of sound. Alternatively, you can use the material to fill voids and cavities in the walls of the container.

Another material to consider for insulating shipping containers is blanket insulation. This material comes in pre-cut lengths. However, you may need to cut the blankets yourself during the installation process.

Because blanket insulation is compressible, it is not self-supporting and must be cut to fit the container. For a more efficient, insulating material, you can consider using studs in the walls of the shipping container.


If you are preparing to ship hazardous materials, vermiculite is a great option. Its spongy, compressible nature helps it absorb shocks associated with shipping.

It is a good choice for shipping hazardous materials, like unused chemicals and hazardous waste. It can prevent a spill from spreading or a hazmat incident from occurring during transit.

Vermiculite is sold in different grades, including Grade 4A, which is the most commonly used type.

Vermiculite is a common mineral with a wide variety of benefits. It is a popular packing material and has a long history of use. It is a versatile material that is especially effective for shipping odd-shaped objects.

It is also a good absorbent and can cushion objects from impact and shock while shipping. It can be used for a variety of purposes, including insulating shipping containers.

Asbestos-containing vermiculite can be a risk to those who work with it. This mineral is safe if it is sealed well. However, it may release asbestos if it is disturbed or handled.

To avoid the risk of asbestos exposure, you should seal the space after installing vermiculite insulation. If you are not sure, consult an asbestos removal contractor to install attic flooring or other materials.

Asbestos-contaminated vermiculite was commonly used in the United States until 1990. If you are removing vermiculite from a shipping container, take precautions to prevent the risk of asbestos exposure.

Vermiculite is a natural mineral fiber, similar to popcorn, which expands when heated. Moreover, vermiculite can be used in insulating shipping containers.

Why use TheShip to get shipping container quotes?
Best Prices
Quick Turnaround
Easy Process

Compare & Save

View deals on shipping containers from suppliers in your area now

Takes less than 30 seconds