One of the hardest type of structure to insulate are structures made of metal. This is because metals are highly conductive of heat and cold. They are also highly reverberative to noise.
Below you will find a video of a recent insulation of a large metal shed and the reasons why closed cell spray foam insulation was us ed in insulating this metal structure.
Sprayfoam Solutions has just completed this shed for a customer, thermal insulation was an issue but with storage, in mind, the condensation, dirt/dust and little critters entering through the numerous holes and gaps were also a major issue. By using a closed-cell zero flame spread index foam we were able to create a thermal/air and moisture barrier along with filling all the holes and gaps.