Slide clamps over the flexible duct at both the roof cap and the fan housing then slip the clamps over the tailpieces.
Installing exhaust fan in bathroom through roof.
The patched areas can be repaired with spackling later.
Attach the drywall filler to a larger piece of wood set it in the hole and drive screws through the ceiling into the wood.
This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
If the hole is too big you ll need to patch the ceiling.
Try to keep it close to the fan location.
Access the attic and bring your light cordless drill screws and bathroom fan housing.
Cut a piece of drywall to make the ceiling hole the right size for your fan.
Start in the attic and drill a hole through the roof in the desired vent location.
You will need a partner for this step as you cannot see the ceiling from this position.
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Wrap the joints with duct tape.