How Much is Enough?

How much attic insulation is enough? Minimum thickness is 12.25 inches for R30. This attic has an "attic card" showing the depth of the insulation. Colorado has 4 zones for rating R-value/thinkness of insulation to be used, (R30-R60). There are at least 4 types of insulation. It is best to follow the manufacture's instructions when installing or adding insulation to the attic.

Minimum thickness is 12.25 inches for R30. This attic has an "attic card" showing the depth of the insulation. Colorado has 4 zones for rating R-value of insulation. (R30-R60). There are at least 4 types of insulation. It is best to follow the manufactures instructions when installing or adding insulation to the attic.