Lowering a ceiling

Old 12-02-15, 12:04 PM
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Lowering a ceiling

I have a 3 season room with a ceiling fan securely mounted to the roof joists. The room currently has a plywood ceiling. I am adding a 2 inch layer of rigid foam, 3/4 strapping, and 1/2 inch sheetrock --- lowering the existing ceiling by 3.25". My question is whether I have to lower the fan or can I just leave the original mounting hardware in place and install a new canopy to the new sheetrock ceiling. I have plenty of clearance for the blades --- it's a 10 foot ceiling and the fan hangs 20 inches down.
Old 12-02-15, 12:16 PM
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Remove the existing electrical box and build it down the thickness of the new ceiling with solid blocking behind it.
Old 12-02-15, 02:08 PM
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Is the existing box fan rated?
Old 12-04-15, 05:32 AM
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The box needs to be recessed no more than 1/4" from the face of the drywall. You need to move the box down.

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