When I started building our house, I was not active as radio amateur. That's bad, since I had a nice opportunity to make a superb grounding in the beginning. But then the second floor was built, I built in some antenna channels in the roof and walls. Also I prepared for different options that future might bring.
|My attic. Pipes go down to my ham shack inside the roof isolation and inside the walls. Antenna wires are pushed into the pipes...|
|...and they appear here, behind my shack. The shack-side looks like this, since it is not finalized yet...|