This is great insight and something that I will investigate in more detail. What thicknesses did you find were used for the phenolic strips? Also, was the phenolic strip method typically employed with bolted/riveted assemblies, or were structural adhesives ever employed as well? Thank you!Maybe i missed it but i believe there is a key element needed in your design of aluminum to aluminum skin joints. You should add a thermal barrier. These are thin phenolic stips you bond to the aluminum frame before attaching the outer skin. They will eliminate thermal sweating, then i assume you will add insulation between the frames before you skin the inside. This sweating is not the same as condensation from use. I sent almost 10 years running military shelter production and 100% use this design requirement. From small humvee 788 to large ******’s shelters.