Shipping containers are well known for their strength, durability, and versatility. Whether used as storage units, workshops, or even living spaces, these containers have become a popular choice for all kinds of uses across Canada. However, insulation is essential to keep them comfortable and efficient year-round—especially during harsh winters and hot summers. Proper insulation not only protects your belongings from extreme temperatures but also helps manage humidity levels and reduces condensation, which can damage your stored items.
In this comprehensive guide, we’ll dive into insulation options, techniques, and tips to help you make the most of your shipping container.
Why Insulate a Shipping Container?
Shipping containers are primarily made of steel, which is an excellent conductor of heat and cold. This can make containers extremely hot in summer and freezing in winter if left uninsulated. Here’s why insulating your container can be a game-changer:
- Temperature Regulation: Insulation keeps the interior of your container at a more consistent temperature, protecting anything stored inside from extreme temperatures.
- Condensation Control: Condensation can lead to rust, mould, and mildew, damaging the container and its contents. Proper insulation helps to prevent moisture buildup.
- Energy Efficiency: If you’re using your container as a workspace or living area, insulation will help reduce heating and cooling costs, making the space more energy-efficient.
Types of Insulation for Shipping Containers
Choosing the right insulation is key to ensuring your container is ready for all-weather storage. Here are some popular insulation options, along with their pros and cons:
1. Spray Foam Insulation
Spray foam insulation is a popular and effective choice for shipping containers.
- Pros: Spray foam adheres to surfaces, filling gaps and creating a seamless barrier. It’s moisture-resistant, reduces condensation, and has excellent thermal properties.
- Cons: This type of insulation is more costly than others and requires a professional application to ensure proper ventilation.
- Best Use: Ideal for high-humidity areas or containers exposed to significant temperature changes, such as storage containers in extreme climates.
2. Rigid Foam Board Insulation
Foam boards are a budget-friendly insulation option, providing solid thermal resistance and easy installation.
- Pros: Foam boards are easy to install and can be cut to fit walls, ceilings, and floors. They offer a good balance between cost and effectiveness.
- Cons: They don’t seal as tightly as spray foam and may need additional moisture barriers in high-humidity areas.
- Best Use: Great for general storage or basic workspace containers that don’t require climate control.
3. Blanket Insulation
Blanket insulation, typically made from fibreglass, is a traditional insulation option that works well with shipping containers.
- Pros: Fibreglass insulation is relatively affordable and easy to install. It’s widely available and can be fitted between the wall frames of the container.
- Cons: Fibreglass is prone to absorbing moisture, which may lead to mould if not properly sealed.
- Best Use: Good for low-humidity environments or as an additional insulation layer in containers used for storage.
4. Reflective or Radiant Barrier Insulation
Reflective or radiant barrier insulation reflects heat away, helping to maintain a stable internal temperature.
- Pros: This option is lightweight, moisture-resistant, and particularly effective at reflecting heat.
- Cons: It is less effective in cold climates, as it’s designed to repel heat rather than retain it.
- Best Use: Ideal for containers in hot climates where the primary goal is to reduce heat inside the container.
How to Insulate a Shipping Container Step-by-Step
Once you’ve chosen your insulation type, it’s time to apply it. Here’s a general guide to insulating your shipping container:
Step 1: Clean and Prepare the Container
Before installing insulation, thoroughly clean and inspect your container for any rust, dents, or leaks.
- Clean the Interior: Remove any dirt, dust, and debris from the walls, floor, and ceiling.
- Repair Any Damage: Apply rust-proof paint to any areas showing signs of rust and seal any gaps or holes to create a smooth surface for the insulation.
Step 2: Install a Vapour Barrier
A vapour barrier helps prevent moisture from getting trapped between the insulation and the metal walls.
- Vapour Barrier Installation: Attach a vapour barrier directly to the container’s interior walls and ceiling. This will keep moisture from reaching the insulation and causing condensation-related issues.
Step 3: Apply the Insulation
Depending on the type of insulation you’ve selected, the application will differ:
- Spray Foam: Professionals will apply the foam in layers, ensuring all surfaces are covered.
- Foam Board and Blanket Insulation: Secure these materials to the walls using adhesive or specialized insulation clips.
- Radiant Barrier: Attach the reflective sheets to the container’s walls and ceiling, allowing a small air gap between the insulation and the surface for optimal effectiveness.
Step 4: Insulate the Floor
For containers used as workspaces or storage, floor insulation is also crucial, especially in cold climates.
- Insulation Options: Rigid foam boards or spray foam can be used on the floor. If using foam boards, install a layer of plywood over the insulation to protect it and create a stable surface.
Step 5: Add Finishing Touches
Once the insulation is installed, consider adding drywall or plywood to cover it. This will give the interior a polished look and provide additional protection for the insulation.
Additional Tips for Winterizing Your Shipping Container
If you live in a region with particularly harsh winters, here are a few extra tips to winterize your shipping container:
- Seal the Doors and Windows: Check door and window seals for any drafts and replace damaged seals as needed.
- Ventilation: Proper airflow helps prevent condensation buildup. Install vents or a small exhaust fan if you’ll be storing items sensitive to moisture.
- Elevate the Container: Placing your container on a gravel base or concrete blocks can help with drainage and reduce exposure to moisture.
Benefits of an Insulated Shipping Container for Year-round Use
Properly insulating your shipping container has long-lasting benefits that go beyond temperature regulation:
- Improved Storage Conditions: Insulation creates a controlled environment, ideal for storing items that could be damaged by extreme temperatures, such as furniture, equipment, or inventory.
- Comfortable Workspace: For containers used as workspaces, insulation will make the interior more comfortable, allowing you to work year-round without spending too much on heating or cooling.
- Extended Container Lifespan: Reducing moisture buildup helps protect against rust and corrosion, ultimately extending the lifespan of your shipping container.
Ready for winter?
By insulating your shipping container, you can transform it into a comfortable, all-weather storage or workspace solution. Whether you choose spray foam, foam boards, or radiant barriers, proper insulation will protect your items and ensure the container stands up to Canada’s varied climate.
Looking to buy a shipping container for year-round use? Coast Containers has a wide selection of new and used shipping containers for sale across Canada. Contact us today to find the perfect sea can for your storage needs and get ready to make the most of your container in any season!
