Shipping containers have gained immense popularity as versatile structures for various purposes. Whether you’re planning to convert a shipping container into an office, kitchen, or even a bathroom, insulating it properly is crucial. Proper insulation ensures temperature control, energy efficiency, and protection against condensation. In this blog post, we will delve into the world of insulating shipping containers, exploring different insulation options and their benefits. By the end, you’ll be equipped with the knowledge to make an informed decision about insulating your 40 ft insulated shipping container or insulated conex box
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At Stackhouse, we understand the importance of staying underbudget on your container home build. If spray foam insulation seems out of the realm of possibility for your budget, there are a number of other viable alternatives that will still get the job done.
Similar to spray foam in composition, expanded foam insulation is basically just spray foam sold in pre-fabricated sheets.
Typically sold as large, pre-sized sheets and panels, pre-manufactured expanded foam is usually found in lengths that match the heights of a standard 8 foot ceiling. Also commonly-available in a 48’’ length, these sheets of expanded foam are often sold with mylar backing adhered to one side to maximize their effectiveness.
Expanded foam is easy to cut with a straight razor and can typically be laid like drywall in the gaps between the metal studs along a container wall. Similar to drywall, the gaps between sheets of expanded foam are typically sealed with a mylar tape that lessens the possibility of air and energy escaping after installation.
Unfortunately, this type of container insulation is prone to deteriorating R-value over time and a small user error in installation can drastically reduce its ability to insulate. Expanded foam board is also unable to create a weatherproof seal like closed cell spray foam, as the seams between pieces are much more likely to let water in under certain circumstances.
Regardless of its shortcomings, expanded foam insulation is the highest R-value container home insulation alternative available outside of spray foam and is definitely worthy of consideration for a budget build.
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The most commonly-available varieties of expanded foam insulation are as follows:
Lower- R-Value open cell foam with air filling open spaces. Open Cell Polyurethane Foam is less dense than closed celled varieties and exhibits a ‘spongier’ feel
Closed Cell Polyurethane is the closest you can get to the insulating effectiveness of a spray foam in a pre-fabricated form. Its R-value is higher due to the addition of a ‘blowing agent’ that replaces the air in the open cell foam with another gas with better heat conduction efficiency.
Similar in composition to Polyurethane Foam but manufactured with a different chemical reaction that makes it more rigid and thermally-resistant
Sheets of small plastic beads that have been fused together to form a uniform, rectangular piece.
Melted plastic material that’s been molded into rectangular sheets.
If you’re uninterested in insulating your container home with foam, there are still a number of other options available for you to consider.
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