Replacing interior doors with existing carpet
We just moved into a 27-year-old house and are looking to do some repairs/updating. One of the jobs is a replacement of the interior doors from 1980s brown flat hollow core doors to 6 panel doors. A few of the current doors don't close correctly (have to push up or down on the knob to get to latch). There is wall to wall carpet involved. Are door frames in cookie-cutter houses like this fairly standard in size? I'm concerned I will rip out my first door and then find that the new door's frame doesn't fit in the gap created by the removal of the previous frame or, worse, the frame will be smaller and leave a gap after installation between the frame and carpet.