I am planning to run both coaxial and cat5e cables from my basement to my (finished) attic, along the outside of the house. I'm trying to figure out the best practice.
If it were a single cable, I think I would just drill a hole through the wall, feed the cable through (taking care to leave a 3" turning radius on the cable run), protect the cable from the aluminum siding with a "mushroom" bushing, and seal it up with silicone.
But I'm reluctant to do the same thing for another cable right next to it. I thought maybe a slightly larger hole with a slightly larger bushing could accommodate both cables, but I don't know if such bushings exist.
Another option I've seen is to drill a 1" hole, run PVC conduit through the wall, and attach an LB box on the outside. Sounds good, but what seals the opening on the inlet side where I'll be inserting the cables? Or does this commit me to using conduit for the whole run?