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Waterlogged liner is not just dirty; it can be rejected and may create mold/air-quality problems. Protect lined duct off the ground and under cover, and flag wet material before install.
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You stage 20 sections of internally lined acoustic ductwork out in the open staging yard overnight. A sudden rainstorm hits, soaking the internal fiberglass liner layer completely before it can be hoisted into the building.
Waterlogged liner is not just dirty; it can be rejected and may create mold/air-quality problems. Protect lined duct off the ground and under cover, and flag wet material before install. The likely recovery is to check the condition, correct prep/setup if it is within your assignment, and bring the foreman clean information before the work creates rework overhead.
Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.