http://forum.tvfool.com/showthread.php?t=233 , Here is how to aim indoor Tv antennas ,
http://kyes.com/antenna/pointing/pointing.html . If the house is wood frame with wood or vinyl siding then a indoor antenna will work. If the house has , metal siding , stucko wire , metal foil backed insulation , a metal roof , concrete , bricks , solar panels , then the reception will be reduced or blocked.