R38 - 10.25 in - Fiberglass Insulation - Insulation - The Home Depot.
How thick is R38 insulation?
Easy to handle and pre-fabricated batts with a thickness or depth of 11.25″ will be needed to attain an R-value of R38. It is used in floors of crawlspaces and attics, supplying water-resistant insulation with no forming of mildew, fungi, or mold.
What is the R-value of 4 inches of blown insulation?
Blown-in fiberglass has an R-value of 2.2 to 2.7 per inch. Batts.21 Nov 2017
What R-value is 6 inches of insulation?
Fiberglass Insulation Batts Fiberglass blankets or rolls provide an R-value of up to 3.2 per inch, so a 6-inch fiberglass batt may achieve an R-value of 19.2, and some high-performance products are rated at R-21.
What is the R-value of 10 inches of blown insulation?
How thick is an R 38 batt?
The R-38 high-performance batts are 10˝ to 10-1/4˝ thick as opposed to stan- dard R-38 fiber glass insulation batts of 12˝.
R30, by the book, will block about 97% of heat transfer. This is reduced by sub-optimal installation, which is ubiquitous. R 8 insulation, by the book, will block 87.5% of heat transfer, so, if you add R8 to R30, you are blocking an additional 87.5% of the 3% that gets through the R30. See where this goes?
How thick are fiberglass batts?
The standard R-19 fiberglass batt is 6.25″ thick. If you put that batt in a closed 2×6 wall, it will be compressed 0.75″ because a 2×6 is 5.5″ deep.18 May 2017
Is R38 attic insulation enough?
R-Value is a measure of insulation's ability to resist heat flow. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.
Is R30 insulation good for attic?
R30 insulation is the minimum insulation recommended for an Attic from climate zone 1 to 3, while it can be used in cathedral ceilings in all climate zones across the USA. It can be used as maximum insulation in climate zones 4 8 of the USA for floors.