Moist Ceiling, Paint Cracking, Washing Machine Shakes the Whole House?

Hi, this is my initial residence (3-story) townhouse (9-year old, located in Raleigh, NC), so we do not know most about residence maintenance/repair. Even if my complaint seems to have a elementary solution, greatfully share it with me.
The roof of a second building proposed to moment as well as essentially we can see which a tone around which area is darker than a tangible roof color, which substantially indicates which it is moist. Same complaint appeared to rise upon a wall of a room upon a third floor. Actually during your convenience we hold it we can feel which it is soft.
I do not wish to trick anybody though a wet roof area as well as a wet wall intersects during a same point, subsequent to a washer. We have a really absolute front loading appurtenance upon a third building which shakes a total residence even during marked down turn cycle. we am not certain if these vibrations during any soaking cycle means a pipes or any joints turn loose.
I theory my subject is whom should we deliberate with to figure out a problem. And even if a soaking appurtenance has zero to do with a wet walls, how can we revoke a extreme volume of vibration?
Thanks in allege for any inputs.