I thought about an outdoor antenna, but decided against it. My roof is steep with a 30 foot drop off the back. If I were to put one up here's what I would have to do/need:
-5ft pole, TV antenna mast type
-Roof mount
- Coax cable to ground level, hide coax run under siding
-lightning protection double barrel PL-259 Female connector , ground cable to a 8ft copper rod or use telephone ground rod
-Coax run into the basement, then try to fish it upstairs by following my CATV runs.
Or better yet, hook it up to a scanner in my basement to avoid the hassle of trying to fish the coax up 2 levels.
Something like that would probably be what you need to do to install your outdoor antenna.