What is better r19 or r30 insulation?
Beside this, how many inches of 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.
Likewise, is r19 good insulation? R-19. Although the U.S. Department of Energy rates R-13 insulation as "good" for use in walls in southern areas of the country, it rates R-19 insulation higher, designating it as "great." That is because R-19 insulation provides more thermal insulation than R-13 does.
Hereof, is r30 good insulation?
Recommended insulation levels for retrofitting existing wood-framed buildings
|Zone||Add Insulation to Attic|
|Uninsulated Attic||Existing 3–4 Inches of Insulation|
|3||R30 to R60||R25 to R38|
|4||R38 to R60||R38|
|5 to 8||R49 to R60||R38 to R49|
What is a good R value for insulation?
Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy's (DOE) ranges for recommended levels of insulation below.