Check for studs at the location where you want the wire to exit.
Fishing wire from attic to basement.
The presumption is that the cable run will be looped from one box location down or up into a basement crawlspace or an attic then across floor joists before entering the stud cavity where the next box is located.
It should be a straight shot to the basement.
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Do you have a chimney that runs from the basement to the attic.
If there s enough clearence on the sides of the chimney you might be able to fish a cable up that way.
From the attic lower the fish tape all the way to the basement connect your wire and then pull it back through.
Confirm there are no crossbeams or ductwork along the path the wire will take typically straight up to the attic or straight down to the basement.
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For a chimney flue the wire should be 12 from the flue.
Fishing a coax wire from attic to basement typically a cold air return utilizes the the walls and studs as the duct.
Confirm the space is free.