What is the typical sequence for installing interior doors and frames in a wall system?

• A. Hang doors before frames.
• B. Install frames plumb and square, secure to studs or blocking; hang doors; adjust hinges and latches; install trim; verify swing clearances and operation.
• C. Install trim first.
• D. Paint before hanging.

Answer: (B)

Setting up interior doors and frames in a wall system follows a logical sequence to ensure proper alignment and smooth operation. Start by installing the frame so it is plumb and square, securely fastened to studs or blocking. This creates a stable reference for the door and prevents future misalignment as you proceed. Next, hang the door on its hinges and make any needed adjustments to the hinges and latch plate so the door swings freely and latches correctly without rubbing. Once the door operates smoothly, install the trim (casing) to finish the opening and then verify that the swing clearances and overall operation remain correct with the trim in place. Painting or finishing before hanging the door can complicate fitting the trim and may lead to extra touch-ups, so it's typically done after the frame and door are correctly installed and the trim is set.