Use pressure where the surface can handle it
Concrete, selected stone, and durable outdoor surfaces can often be pressure washed safely after the technician evaluates their condition.
Use soft washing for delicate exteriors
Soft washing is designed to remove organic growth and grime while reducing the risk of etching, water intrusion, or paint damage.
The correct answer is surface-specific. A professional should select pressure, chemistry, dwell time, and rinsing based on the material rather than using one method everywhere.