That sounds good.
Since I don't know the signal loss in the attic, what TV you are using, how low the per cent reading can go and still have good reception, and how long the coax lines are to the two TVs, you will need to do some testing.
You have several alternatives. First try a 2-way splitter. If the signals get too weak after splitting, add a Channel Master 3410 before the splitter. It is also possible to use the 3410 as a preamp near the antenna, feeding it power from down below with a PCT-MPI-1G power inserter. Split after the power inserter.
The other alternative is to try a 2-way splitter and if the signals are too weak after splitting, add a CM7778 or Antennas Direct Juice preamp near the antenna and split after the power inserter down below. The CM7778 has an FM filter. The Juice does not, but it does have a 4G LTE filter to reject cellular interference that is moving into frequencies just above channel 51. You can add an FM filter to the Juice, but it probably will not be necessary after looking at your FM signal report.
http://www.fmfool.com/modeling/tmp/d...4/Radar-FM.png