Gregory La Vardera posted this excellent primer over at Green Building Adviser on the differences between fibreglass and mineral wool batts.
As Gregory points out, ROXUL Mineral Wool batts are not associated with the typical failings of a fibreglass batt installation. This is due to the density of the product and the ease of cutting and trimming. The product also sheds water and is fireproof.
My only critique of his article is is statement "I don't need my insulation to make an air seal, because I used that
good ol' housewrap on the outside. Nope, nothing wrong with housewrap —
but it provides no help with the air sealing you need at your vapor
retarder. The air seal in this case wants to be on the warm side of the wall,
to prevent interior moisture from entering the wall cavity and
condensing during the winter heating season."
This is actually incorrect, an air barrier ANYWHERE in the assembly will block air flow through the assembly. I will talk more about this in an upcoming blog entry. For now, I did not want to detract away from the rest of the posters review of ROXUL mineral wool insulation.