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Fan vibration needs structural fastening, not drywall screws into weak framing. Replace stripped fasteners with approved structural screws/anchors into real backing.
['A louver or sleeve tied to a fan can shake. Short drywall screws in light-gauge studs can loosen, strip, and let the frame rattle or sag.', 'Check the backing, screw type, frame movement, and fan vibration. The fix is not more random screws; it is approved structural fastening into blocking, heavier track, steel framing, masonry, or another rated support detail.']
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