What is better r19 or r30 insulation?
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Likewise, 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.
Subsequently, question is, 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.
Regarding this, 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.