At Plumbline Services - In everything we do, whether it's in the office or in your home, we strive to do what's right. But what does "right" mean to us? What standard are we measuring ourselves against? The answer is hidden in our company's name. A "plumb line" is a string attached to a weight. Its purpose is to ensure that something is upright and straight. It provides an objective standard against which one can measure what he has built.