I am trying to run a bunch of network cables from my network switch in the basement into the attic so that I can disperse them throughout the second floor bedrooms. At the same time, I needed to repair some Romex cables that squirrels bit and chewed through in my attic. I decided to replace the entire span of damaged Romex. I paid to have the attic "squirrel-proofed" with a one way door and their entrance-way was fully sealed so they wont be damaging things anymore hopefully. Also at the same time that of all this is happening, I am deciding to take the opportunity to run two more 14 gauge and two 12 gauge Romex pulls for a planned attic expansion.
Anyway, I am trying to figure out what the best way of routing all of these wires would be. I had to rip out the drywall because the wires were stapled to the frame when the house was renovated in the early 90's so my only option was to cut into the drywall to unstaple them. So I was able to take a good look at what is going on behind the walls. There are a whole host of "alarm", telephone, and COAX wires running DIRECTLY on top of the Romex. This was likely done by the lazy alarm installer technicians AFTER the electricians did there work in the 90's. I am pretty sure that is not to code to have low voltage wires run through the same hole as 110v. I want opinions on the best practices of how I can go about "cleaning" this mess of wires up. I noticed that when we run our portable space heater in the upper floors, the 14 gauge Romex gets luke "warm" which I don't particularly like.
Finally, I wanted to know if it would be okay from a structural standpoint to drill an additional hole through the header joist for the front facade of the house between the first and second floors for the network cables and new Romex runs. Or would it be OK to put in a notch with some nail guards?
Here are some photos of the situation. I would just like to get some professional opinions on the matter. Pictures:
Passing over a stud: (this happens due to the fact that the wires run behind a closet on the second floor. I could technically bypass this and go straight up but I'd possibly have to knock down more drywall on the second floor. )
At the end of the day, I will have a total of SIX Romex Cables, One for the front two second floor bedrooms, one for the back two bedrooms, one for the front attic renovation room, one for the back attic room, and two 12 gauge for HVAC unit and appliances (in the attic renovation))