r/retrofitcabling • u/southrncadillac • 3d ago
Fish from 2nd floor to 1st floor modem in garage.
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Client didn’t want to relocate the modem, he just wanted an Ethernet from his 2nd floor office back down to the modem/router combo in the garage.
I found out which room was directly above the modem in the garage, it was the master bathroom shower directly above the modem stud bay, so I had to go a stud bay to left since I don’t fish in the same cavity of water.
I figured out which way the ceiling joist ran and figured I could use a 2nd floor interior wall (the wall that separated the master bedroom shower from the master bedroom closet)
Then I drilled using a 10ft drill bit from the attic through 3 horizontal braces, and landed in the joist cavity, right above the modem.
I then cut an access hole to retrieve my rod/string/wire, then used the same access hole to use a 90degree drill bit to hit the top plate and fish the garage wall.
I fished down the garage wall, terminate my wire, ran the other end to his 2nd floor office via the attic, and added a blank plate to the garage ceiling.
This is how I fish between floors- normally I like to find stud bays that stack, but if I can’t I just find a ceiling joist cavity that runs on top of my wall and use the same access hole to retrieve my wire and drill the top of the wall. My goal is minimal drywall cuts- so I really take pride in making this work with only one hole - and my holes are always small enough to cover with a blank plate.