I was seated just in front of the back door of our room (double doors with a small gap in between...the kind that allow one to hear everything going on in the hallway). Maintenance walked through having a candid conversation during the middle of section 2... no big deal. They didn't really get me out of my rhythm too badly. During the third section (RC), however, it sounded like that were building something back there. I could hear them hammering and moving stuff all over the place with no regard for the test center (likely not their fault as I wouldn't be surprised to learn that they were not informed of the test). It was ridiculous. I was trying to read the damn passage, and there was a bang almost on cue every couple seconds. I tried to power through it, but it went on long enough that the entire passage was ruined for me. I got up and left right away. The realy frustrating part is that I killed the first two sections. Everything was going perfectly until the damn maintenance crew distraction.