I now have satellite and terrestrial, the last house for a long time only satellite, although not just sky, many of my boxes were simple free to air.
Once moved to front of house on side of garage, as there is no need for hight with satellite, it only failed once due to weather, it snowed and the snow was in front of the dish, pair of step ladders and a brush and all up and going again, would not have wanted to go up ladders in the snow to brush it away.
Be it an aerial or dish it can go wrong, but since dish is lower, much easier sorting out problems with a dish.
However it is down to location, in real terms there was no need in later years to have the aerial high, when we moved in Moel-y-parc was Welsh and Winter Hill was English so to get channels in a language we could understand we aimed aerial at Winter Hill. Problem was Moel-y-parc was so close, we could get Welsh anyway, it did not matter where the aerial was aimed. So when we went digital the TV was asking to be re-tuned every other day. Be it freeview changing frequency or weather conditions meaning TV thought frequency had changed as Welsh was stronger, it was a problem having the aerial plugged in, even using satellite, the TV would demand to be retuned to terrestrial, so when the landers were done, aerial never went back up.
However had I aimed at Moel-y-parc and fitted aerial on back of pole for satellite dish, so hidden from Winter Hill likely today it would work, as even from Welsh aerial most programs are now in English.
When I lived in Suffolk again problems with terrestrial, but completely different, the transmitter aerial was too high, and if we got and inversion, then we would lose local TV and get Dutch TV instead, unfortunate space between sound and vision was different so either sound or vision not both.
Even the TV or box changes things, our new TV will directly connect to satellite without any box, however for some reason unknown, UKTV Drama etc, will not work from satellite, works OK with other boxes connected to same dish, so some thing to do with TV, however since UKTV Drama does work terrestrial, not really worried. The other program called Drama works OK.
So unless we have same TV and live next door we can't really say what is best, or what will work. If it were me I would stick an aerial up, while you have scaffold, but as to how big, or what band, that's another question. Winter Hill uses many frequencies, in this direction we can use narrow band aerials, but in other areas served by same transmitter they need wide band.
You would have to look up your transmitter to find what is required.
