Inspection, Repair, and Maintenance
Inspection, Repair, and Maintenance
This domain tests quality control and lifecycle care: inspecting completed work, identifying defects, repairing damage, and documenting conditions. The exam favours scenario questions about wet insulation, damaged jacketing, and firestop or vapour-barrier defects.
Core rules
- Inspect before closing ceilings or covers. Check thickness, density, fit, joint tightness, fastening, vapour-retarder continuity, jacketing laps, band spacing, and firestop labels.
- Compare work to the specification and approved submittals. Record deviations and correct them before sign-off.
- Look for corrosion under insulation: staining, pitting, blistered paint, and moisture at terminations. Corrosion under insulation is a serious defect on carbon steel in wet service.
- Repair wet insulation by removing the source of water, removing the wet material, inspecting the substrate, drying or replacing it, and restoring the vapour retarder and jacket.
- Do not cover wet insulation or damaged jacketing with a patch alone. Find the entry point.
- For firestop damage, restore the listed system; do not top up with generic sealant.
- Maintain records: inspection reports, photos, repair dates, materials, and firestop labels.
Worked example
During a roof inspection, you find a 2 m section of outdoor aluminum jacketing that is dented and open at a lap. The insulation beneath is wet. The correct repair is to remove the jacket, remove the wet insulation, inspect the pipe for corrosion, clean and dry the substrate, replace the insulation, install new jacketing with the lap shedding water, and seal the termination. If the pipe is pitted, report it before covering. Do not merely tape the jacket. Reasoning: water has already entered; the insulation's thermal and corrosion-control function is lost until the wet material is removed.
Traps
Marks are lost by covering wet insulation, patching only the jacket, reusing wet material, ignoring corrosion under insulation, and failing to document the repair. Another trap is restoring a firestop with unlisted sealant.