It will be next to impossible to drill downward under the portion of the roof that slopes to the attic floor without a right angle drill.
Run a drop through attic.
My cable tv is distributed through the attic so it seemed like a good solution to run my home network through there as well.
Carefully cut a hole in the ceiling or remove a whole or partial panel from the drop ceiling.
Then the attic doesn t get as hot in the summer or cold in the winter and you cut down on thermal conductivity through the ceiling of the upper floor as a bonus.
While one person holds the flashlight the other person should use a staple gun to run the wire along the rafters from one entry hole to the other.
Once you ve got the hole cut run the vent hose through it and close the remaining gap with silicone sealant.
For single floor homes with a basement the basement may be the best path.
The actual install of recessed lights here https youtu be 5yc8aqnvqqg the long bit is actually used.
One reason you are not allowed to run wires across the bot tom of floor joists is to eliminate the temp tation to use the 12 2 wire for your kitchen gfi as a place to hang laundry.
We had pex lines run through our attic space to the bathrooms and laundry area.
Be sure that you re not interfering with wires or pipes that may run across the top of the room.
Must be run through bored holes or be attached to a running board.
Bring all of the wire up into the attic.
The staple gun should be loaded with wire staples designed for holding the size and type of wire you are running.
Current carrying wires are meant to support only their own weight.
If you re building a new house or replacing the roof you can start with lighter colored shingles and go from there.
To a couple of bedrooms by passing the lines through where plumbing goes to the attic for the soil pipe.
Pex had to be ran under the concrete from the utility closet to the kitchen.
Brought the cable thru the attic into the hole in the wall and tried to drop the line.