Responsibilities Residential and commercial installers and servicers install and service a wide variety of interior and exterior prefabricated products such as windows, doors, electrical appliances, water heaters, fences, play structures and septic and irrigation systems at residential, commercial or institutional properties. They are employed by companies specializing in specific product installation and service. · Determine layout and installation procedures · Measure and mark guidelines to be used for installations · Prepare and maintain work materials and supplies · Load and unload trucks with supplies and equipment · Utilize hand and power tools · Erect and install scaffolding, falsework and other working platforms