The roof is the most maintenance-intensive element of any commercial building, and it is also one of the most underspecified. Owners who accept a generic roofing specification during construction often pay for that decision repeatedly through repair cycles, premature replacement, and interior damage from leaks. Delta Building Systems specs roofing systems based on occupancy type, local weather conditions, and expected maintenance access. The right membrane, drainage, and insulation combination for a warehouse in Florence is different from what belongs on an office building or manufacturing facility.