I'm running CAT6 cable from the ground floor of my house up into the loft, so my kids can have very fast Internet connectivity in their bedrooms, and so I can make the wi-fi super quick. The best route for the cable takes me through a stud wall and up the stairwell into the loft. I've opened the wall at each noggin and notched it to allow the cable to pass, but it also has to pass what I believe is called the 'double-header' between the ground and first floors, where the joists meet the stairwell. I'm not sure what the rules are. Am I permitted to notch this for the 6mm CAT6 cable to pass, or would it be better to hide the cable in the plasterboard and leave the double-header well alone?
