TinnerFlow™2nd YearQA/QC / FinishGREEN · Standard Correction
Linear slot diffusers are finish-visible. Loosen, align with manufacturer splice/alignment hardware, square the plenum support, then tighten only after the run is straight.
A continuous slot diffuser run can work mechanically and still look terrible if the sections are jagged. On finished ceilings, that becomes a punch-list item fast.
The fix is to loosen the supports, use the manufacturer alignment pins/splice keys or approved joining method, align the extrusion faces and joints, then lock the plenums/supports without twisting the run. Coordinate with drywall/ceiling layout if the border line itself is crooked.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.