Can I Run Cables In A Cavity Wall. Running cables inbetween cavity walls. You can run low voltage and other cables in bundles.
The worst cable runs occur when walls do not line up from floor to floor, or you have to sidestep heavy beams and posts.
Running electrical cable inside finished walls starts with marking the framing and planning the best cable route. But with patience and cleverness, you should be able to get the signal where it needs to go. Why were cavity walls introduced? I want to put up 4 wall lights on the outside of the house and don't want to run conduit on in response to your question i would say its nearly impossible to run the cables how you mentioned above, 1 because the angle to fish horizontal.