Im sorry I dont agree.... There is a law of diminishing returns on insulation but more insulation WILL lower your heat/AC bill. But no sense putting in R120 and spending double to get an extra 5% efficiency (numbers are an example obviously).janko023 wrote: ↑Jan 12th, 2018 10:19 amI asked this and the answer is, you will not notice a difference and the difference in your bill will not be all that different. What it does is future proof you for any building code changes moving forward. Do R60 and don't have to worry about it for a long while.
Personally when I did my own attic I calculated R60 to be the sweet spot for cost vs gain.
jonnyb: I go in there like PICASSO and toss the glue everywhere, I don't care what house I'm on.