Co-Authored By:
Asked by: Bahadur Lindquist
home and garden indoor environmental qualityHow thick should blown in insulation be?
R-Value is a measure of insulation's ability to resist heat flow. The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.
Accordingly, how many inches of blown insulation is r30?
In temperate coastal areas such as Zone 3, attic insulation of at least R30 up to a maximum of R60 is recommended. For loose-fill cellulose, this translates to a total depth ranging from 8 inches up to 16 inches.
In this way, what is the R value of 10 inches of blown insulation?
| R-value of Materials and Depths | ||
|---|---|---|
| Material | R-value/in | 10" |
| Mineral Wool blown (wall) | 3.1 - 4.0 | 31.0 - 40.0 |
| Cellulose blown (attic) | 3.2 - 3.7 | 32.0 - 37.0 |
| Cellulose blown (wall) | 3.8 - 3.9 | 38.0 - 39.0 |
Batts, or rolls, are large blankets of insulation that are made from either fiberglass or cotton. Blown insulation is accomplished by blowing out chunks of either fiberglass or cellulose from the hose of a blowing machine. The main benefit of blown insulation is that it is a much more consistent type of insulation.