Mistake & recovery · #021Running the seam in the wrong direction, trapping water or allowing leakage
1st YearSheet Metal Work
Orient all seams so water drains away, not toward the seam. On horizontal duct, seams go on the sides or top — never on the bottom where condensate collec…
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Do not
Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.