Exterior Wall Finishes Wall finishes in a hurricane zone is an interesting series of decisions. It certainly depends on what materials the walls are made of. If we do go with ICF blocks for the walls, we need to think about the rigid foam block and the outside wall exposed to the environment. Due to weathering I would not choose wood. There is a Hardieplank siding, which has concrete in it, but our ideal style is more Mediterranean. So stucco…