We have a bonus room with a laundry space adjacent to it. Because we're expecting a baby in August, we need to wall off the laundry area and convert the bonus room to the master bedroom, and make the old master bedroom into a nursery. We have low-pile carpet, with padding, that spans both bonus and laundry. We only need to frame about a four-foot wall running across the room and a four-foot wall perpendicular to that in order to separate the rooms. I would prefer not to cut the carpet, because I don't know a darn thing about adding tack strip in mid-floor like that and I'm afraid it will look crappy. However, I don't know if framing on top of carpet would work. Could the wall get squeaky? Could it crack the mud joint at the ceiling? Thanks for your input.