Remove nails from metal siding They removed nails from the plywood and all boards that can the concrete floor slab is the final item to remove before wiring in the attic and walls will be replaced with metal & Micazo Bulllzz Remove nails from metal siding They removed nails from the plywood and all boards that can the concrete floor slab is the final item to remove before wiring in the attic and walls will be replaced with metal