I was a TV/video recorder engineer in my working days, so I had an aerial erector contact. He put the aerial on the roof and the co-ax into the loft and I took it from there. Freeview reception was was rather marginal because analogue was still being transmitted at the time and digital was not on full power.
I live in a bungalow and the transmitter was in the direction of some huge oak trees just over the road from me. My aerial colleague wasn't too optimistic even though he put up a gain aerial on a 12' pole. Even so, by the time I'd put in a masthead amplifier and a distribution amplifier, the signal to each room was fairly OK with only the occasional drop-out. I say 'masthead' but I put it inside the loft and out of the weather, This meant it was about 13 to 14 feet away from the aerial head. I still thought that would be a better location though.
When analogue transmissions were eventually turned off, the digital signal improved markedly. HD channels can still drop out sometimes when there is high pressure in the atmosphere but SD stays good.
If there was any trouble on the roof, I would probably call out an aerial man. I'd have to pay the going rate now, the same as anyone else. My contact who put the aerial up died some years ago and would have retired by now even if he hadn't, so no more mate's favours for me.