Attics and indoor reception Are Not a reception friendly environment and Never Will Be a reception friendly environment.
Signal attenuation , electric/electronic interference , multipath/reflections-signals bouncing all around in the attic/indoors.
Stucko is held in place with stucko ->Wire<- , The stucko ->Wire<- does a good job of blocking Tv reception.
Concrete roof tiles do a good job of reducing and blocking Tv reception.
Install the antenna ->Above The Peak Of The Roof<- in such a manner that reception is not blocked by the roof and house in the directions of reception.
It is best to install antennas in such a manner the antenna has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own roof and house.
Here is the Federal Antenna Law that says Yes you can install antennas -Above The Roof- so as to have Reliable Reception.
http://www.fcc.gov/mb/facts/otard.html.
The Federal Antenna Law over rules and makes null and void , All , Hoa's/Aho's , housing coven-nuts , dead restricted housing , crazy neigh-boors , city , county , state , governments , and any other antenna haters no matter how they dress them selfs up to appear other then what they are --Nuts.