I have rock wool insulation stapled to the rafters of my cape cod built in 1952. It's in pretty good shape but I'm not sure if it should be replaced or augmented. My 2nd floor is always a degree or two colder than my 1st floor in the winter so I decided I'm in need of some insulation. I checked and noticed that where the dormers were added there is a lack of insulation. A handyman I had doing other work on my house said that the wool insulation is better than the fiberglass and I should keep it and just add some insulation to the knee joints near the dormers where it is lacking and that should be enough. I'd like to take care of this correctly so I'm wondering what the conventional wisdom of rock wool insulation is. Is there an R value for it?
- posted
15 years ago