I own an 1800 Square Ft. Home in Mesquite, Texas. In an effort to make my house more heat/cool efficient, I have been installing attic fans (both in-take and out-take)to help improve air flow in the attic. Already, I have noticed a great improvement in the length of time that my system is running. In an effort to further improve the heat/cool efficiency, I am considering adding some attic insulation to the existing insulation which is now approx 13 years old. My questions are thus:
1.) Which kind of fill type insulation is best for the North Texas area?
2.) Should I insulate the attic space above my garage which currently has no insulation? I was not sure whether this is intentional or whether it was a cost issue when the home was built? (The garage is attached directly to the South wall of my home and serves as my woodshop.