Quality Assurance Best Practices
The Quality Assurance Best Practices domain tests how you prevent defects before they are built in: through submittals, mockups, hold points, inspection, testing, and documentation. The emphasis is on planned verification rather than after-the-fact repair.
Build quality into the process
- Review submittals and shop drawings for reinforcement, flashing, weeps, movement joints, and interface details before work starts.
- Build a mockup panel that represents production work, including grouted cells, reinforcement, flashing, and joint finish. Obtain written acceptance.
- Establish hold points for reinforcement inspection before grouting, grout consolidation, and flashing/weep installation.
- Inspect mortar joint thickness, fullness, and tooling; verify that grouted cells receive the required mortar bedding and consolidation.
- Sample and test mortar, grout, and prisms at the specified frequency; cure prisms under project conditions and evaluate them against the specified compressive strength.
- Document daily reports, nonconformance reports, corrective actions, and re-inspection results.
Worked example
A mockup of an 8-in. grouted CMU wall shows face-shell mortar but missing cross-web mortar at the cells to be grouted. The correct response is to reject the mockup, correct the bedding and grouting sequence, retrain the crew, and re-inspect before production begins. The reasoning: the mockup is a quality control tool, not a cosmetic sample. If the mockup conceals a grout-path defect, production will repeat it, and later prism or visual inspection may reveal incomplete consolidation after the wall is built.
Traps that cost marks
Treating the mockup as appearance-only; skipping prism curing requirements; accepting "visual" grout consolidation without a defined inspection method; and relying on undocumented verbal approval.
Key points
- Submittals and mockups establish the acceptance standard before production.
- Hold points should include reinforcement, flashing, and grout consolidation inspections.
- Prisms must be made, cured, and tested as specified, not under convenience conditions.
- Nonconformances need written corrective action and re-inspection.
- Daily records should identify location, crew, materials, weather, and inspection results.