Indoor Is Not a reception friendly environment and Never Will Be a reception friendly environment.
The best building construction for indoor reception is , wood with wood or vinyl siding.
The following is a - Non Complete List - of building construction that will further , reflect , reduce , block , Tv reception.
Stucko Wire , metal siding , metal backed insulation , metal roof , metal doors , metal beams , metal HVAC , solar panels , concrete , concrete blocks , concrete tile roof , bricks , rocks , and etc. .
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For indoor Tv antenna use a Terk HDTVi (not HDTVa) indoor type antenna aimed at about 260 degree magnetic compass direction , here is how to aim indoor type antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
If reception is not so good with indoor type antenna inside the building , move the HDTVi antenna to a window on the west side of the building.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.