Pre-Hung Door Unit Squareness and Reveal Check

It covers the core fit-and-finish checks that determine whether a pre-hung door unit will operate correctly: frame squareness, jamb plumb, head level, reveal consistency, bottom gap, and basic operation. It also records the unit identifier, date, inspector, and door handing so the inspection can be traced to a specific opening. This makes it useful for incoming QC, shop verification, or field acceptance before trim-out.

Use it after the unit is assembled and before it is installed, or immediately after installation if your process requires field acceptance. It is especially useful before the unit is wrapped, stored, or moved to the next trade, because twist and reveal issues are easier to correct early. If the door is already finished and hung, the same checklist still helps confirm whether the unit needs adjustment or replacement.

A QC inspector, carpenter, millwork lead, or competent installer can run it, as long as they understand door tolerances and can identify binding, twist, and reveal defects. The person completing it should be able to measure gaps, check plumb and level, and verify that the latch and hinges are functioning correctly. If your workflow uses sign-off authority, assign the inspection to the person who can stop release of a non-conforming unit.

Check every unit if the goal is to prevent downstream rework and inconsistent finish quality. In higher-volume production, some teams use this template as an in-process sample check and then perform a final check on any unit flagged for adjustment. If the door is part of a critical opening, such as a rated or high-traffic opening, full inspection is the safer default.

It supports quality control practices commonly used under ISO 9001-style inspection systems by documenting measurable acceptance criteria and non-conformances. For fire-rated or egress-related openings, the inspection should also align with the applicable NFPA and local AHJ requirements, especially where hardware, clearances, or labeling matter. This template is not a substitute for manufacturer instructions or project specifications.

The most common issues are a frame that is out of square, jambs that are twisted, and reveals that vary from top to bottom or hinge side to latch side. Inspectors also catch doors that bind at the strike side, bottom gaps that are too tight or uneven, and latch misalignment caused by poor set or movement during handling. Finish damage, chipped edges, and installation defects are also common findings.

Yes. You can add fields for fire rating, sound rating, material, hardware set, or project-specific tolerances for wood, steel, or composite units. Many teams also add photo attachments, corrective action fields, or a pass/fail disposition so the template matches their release process. If you inspect multiple door types, keep the core checks the same and vary only the acceptance criteria.

An ad-hoc walk-through often misses the same recurring defects because it relies on memory instead of a repeatable sequence and recorded measurements. This template forces the inspector to check squareness, reveal, gap, and operation in the same order every time, which makes defects easier to compare across units. It also creates a record that can be used for corrective action, vendor feedback, or installation training.