We recently purchased an brand new home in August and this is our first year in the house. The house is much larger then my previous house (3200 sqft vs 2400 sqft) and I've noticed that the furnace runs much longer and much more often then my previous house. Based on the specs of the builder, they put in R-11 batts in the ceiling with R-27 blow in "for tight insulation" and R-13 batts in the walls.
Does this sound sufficient? I'm not sure what the total R value would be for the ceiling (do you add the R-11 and R-27 to come up with R-38)?
This past weekend, it was approx 0 degrees out. I turned the furnace down to 62 before we left for a day trip. When I returned, I set the furnace back to 68 (where I normally keep it) and it took approx 2.5 hours for the house to heat from 62 to 68. This seems very excessive to me.