Mineral wool - where they use?

In the attic to insulate the space between the rafters will be the best mat or semi-plates.

Type of mineral wool must be adjusted to the place where you want to be laid. First, you should choose the right product, then see how many inches of insulation needed to partition obtained the required insulation.
External walls with insulation. This is best to check the disc. A good solution is to use CDs (they are cheaper than the hard disc).