looking for some advice on garage insulation. My home is a 15 yr "cookie cutter" type home so the materials used in the home are just avg or below. My master bedroom sits directly above my 2 car garage so the room gets very cold in the winter. I just removed the ceiling and reinsulated it with an r-30 and insulated the duct work with the foil/bubble wrap type. The existing insulation was an r-19 which I guess wasnt bad, but not enough for my situation. I also ran a tee off a feed so I could send some heat into the garage via a register in the ceiling and a return about 1 ft off the floor at the opposite end of the garage. I am also in the middle of searching for two new garage doors with an r-10 value. The walls are insulated with an r-13, do you think that is enough ? Would doubling up on studs so more insulation could be installed be worth it ? Should I just go with the new doors and make sure they are sealed well ? I have already added an r-30 to my attic on top of the r-19 and have noticed quite a difference. Thanks for your time on this subject, steele.