Well I am looking at doing some blown in insulation in my attic. I am looking to bring it up to a r 49 right now my insulation just covers the top of my 2 x 8's ceiling joists. Will I notice the difference in the house immedaitly? I have to put in proper vents before I do the blown in stuff. I am hope to cut my pellet usage down. I burn around 6 tons a season and the the was built in the 1870. I have new windows in the house and brand new storm doors and entry doors too.