Shipping Container: Insulating the Bottom Rail

How To Links:

Insulating the Bottom Rail of a Shipping Container

Option 1

Insulating the bottom rail of a container presents a unique challenge because the rail is perpendicular to the shipping container's corrugated side walls. InSoFast CX Container Panel are designed for the side walls of most shipping containers. In this video above Ed explains a novel approach to filling in a hidden airspace at the bottom rail with reverse cutting of the CX Panel.

At a table saw dado a cut into the panel deep enough to encapsulate the top of the rail  into the CX 44 panel.

Cut a CX44 panel to fit into the rail.

You may need to cut the face off of the  fill in piece to fit snuggly and full support the full panel with the dado cut.

Additional modification to the panel may be neccessary. Here we removed a 1/2" square to fit over square tube corner.

Finished Detail


Option 2

This approach works well  and it is a little bit more robust of a detail with the 2 by lumber providing a harder impact surface. This detail is better suited for reatail rental fleets.

Adhesively apply a filler insulation panel that will give you a flush finished surface.

Mechanically attach the 2 by material through the foam and into the bottom rail.

Finished Detail Cross Section

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Download PDF Instructions

Container installation guide     pdf
Container extended installation guide 2019     pdf
Insulating a shipping container door      pdf

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.