### Critical System Testing and Verification
Final walkthroughs must include comprehensive testing of all building systems to ensure proper installation, performance, and safety before contractor responsibilities end and warranty periods begin.
Electrical system verification includes testing all outlets, switches, fixtures, and circuits to ensure proper installation and function. Use outlet testers to verify proper grounding and polarity, test GFCI outlets for proper operation, and confirm that electrical work meets code requirements.
Plumbing system testing involves checking water pressure, drainage, shut-off valves, and leak-free operation of all fixtures and connections. Run water at multiple fixtures simultaneously to test system capacity and check for pressure drops or drainage problems.
HVAC system evaluation includes testing heating and cooling performance, airflow balance, thermostat operation, and filter accessibility. Verify that system performance meets specifications and that all components are properly installed and functioning.
Lighting system inspection involves testing all fixtures, switches, dimmers, and controls to ensure proper installation and operation. Check that lighting levels meet expectations and that all controls function as intended.
Window and door operation testing includes checking that all units open, close, and lock properly while providing adequate weather sealing. Test operation mechanisms and verify that installations are level, square, and weather-tight.
Ventilation system verification includes testing exhaust fans, range hoods, and other ventilation components to ensure proper operation and adequate airflow. Poor ventilation can cause moisture and air quality problems that affect long-term building performance.
Appliance installation verification includes checking that built-in appliances are properly connected, level, and functioning correctly. Test all appliance functions and verify that installations meet manufacturer specifications.
Safety system testing involves checking smoke detectors, carbon monoxide detectors, security systems, and other safety components to ensure proper installation and operation. Safety system failures can have serious consequences that require immediate attention.
Water heating system evaluation includes testing water temperature, pressure relief valve operation, and proper venting for gas units. Water heating problems can affect comfort and safety while potentially causing property damage.
Structural assessment involves checking that any structural modifications appear properly completed and that new structural elements are adequately supported and integrated with existing construction.