I am about to install a TV roof aerial for freeview. I will run the coax cable down the roof and then down the front of the house. There is a vertical cast iron fall pipe from the guttering which I would like to secure the cable to. There is a reason for this in that I can tape the cable to the pipe so that it is not shown on the house front like cable clips would on the wall. Would I get any appreciable signal loss or interruption of the signal from the pipe do you think?