## How many inches thick is R38?

To attain an R-value of R38, a depth or thickness of the blown-in insulation of 15,7″ is needed for fiberglass and 11,98″ for cellulose. Cellulose is seen as a more sustainable means of insulation, with the recycled paper being used as insulation.13 Jan 2022

## How thick does batt insulation come?

Standard insulation batts meant for use in metal frame construction, as well as those for wood-framed walls, are available in thicknesses of 3.5 inches, 5.5 inches and 6.25 inches.

## What is the R-value of 14 inches of blown insulation?

Cold Climates (R-49 to R-60): Fiberglass (batts): 14” 19” Cellulose (blown): 14” 18” Rock Wool (loose): 17” 25”

## How thick are fiberglass batts?

Here’s something you may not know. 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.

## What R-value do I need for attic?

Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. 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.

## What size is R38?

R38 – 10.25 in – Fiberglass Insulation – Insulation – The Home Depot.

## What is the difference between R38 and R49?

A ceiling with an R-value of 38 lets through only 1/38 of the amount of energy per square foot that passes through that window, or about 2.6% of the energy; a ceiling with an R-value of 49 lets through only 1/49 of the amount of energy per square foot that passes through that window, or about 2.0 % of the energy.

## What is the R-value of 5 1/2 inch fiberglass insulation?

Even in a 5 1/2-inch wall, the R-19 (which is rated at 6 inches of thickness) gives you only R-18. For the best performance, any batt should be installed carefully, to fill the entire space without compressing around wires, pipes, bridging, or other obstructions.

## What is the thickness of fiberglass insulation?

Rigid fiber or fibrous board insulation consists of either fiberglass or mineral wool material and is primarily used for insulating air ducts in homes. It is also used when there’s a need for insulation that can withstand high temperatures. These products come in a range of thicknesses from 1 inch to 2.5 inches.

## What is the R-value of 3 1/2 inch fiberglass insulation?

For example, a wall with 3 ½” fiberglass batting (R-value of 10.8 – 11.9) may have an overall R-value of nearly 14 because of siding, sheathing and drywall.

## Is R38 attic insulation enough?

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.

## What is thickness of R38?

10¼ ” thick, R-38C EcoTouch® Thermal Batt insulation prevents moisture damage and help assure long roof life by providing 1″ of ventilation air space between the insulation and roof deck.

## How thick is an R38 batt?

Higher R-Values in Less Space 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˝.

## How thick are wall batts?

0 Wall Batts. A typical R2. 0 wall insulation batt is 90mm thick. These thermal wall batts are most commonly installed in the exterior wall cavities, providing an effective thermal barrier around the home.27 Sept 2021

## What thickness of fiberglass is needed to get an R-value of 19?

For an R19 rating, around 5.2 inches of fiberglass (batts) insulation would be needed. As for blown-in fiberglass, 6.3 inches should do the trick. Fiberglass is the most common insulation solution in the market. It is widely available in the form of both batts and loose-fill.

## What is the R-value of 1 inch of fiberglass?

R value measures the resistance of heat transfer from one side of an object to another. For example, one inch of solid wood has an R value of 1. In comparison, an inch of blown fiberglass insulation has an R value of 3.1 – 3.4, and an inch of closed cell spray foam insulation has an R value of 6.30 Jun 2019

#### Used Resourses:

- https://www.energy.gov/energysaver/types-insulation
- https://airflowacademy.com/r19-insulation-thickness/
- https://www.energy.wsu.edu/documents/AHT_Inspection%20Attic%20Insulation.pdf
- https://insulationinstitute.org/wp-content/uploads/2016/02/BI467.pdf
- https://www.energyvanguard.com/blog/compressed-fiberglass-insulation-really-so-bad/
- https://www.energystar.gov/campaign/seal_insulate/do_it_yourself_guide/adding_attic_insulation
- http://ww2.owenscorning.com/literature/pdfs/21151-D%20EcoTouch%20R-38C%20(for%202×12%20Cathedral%20Ceilings)%20Data%20Sheet.pdf
- https://todayshomeowner.com/how-to-determine-the-r-value-of-insulation/
- https://insulationinstitute.org/wp-content/uploads/2016/02/BI467.pdf
- https://www.greatdayimprovements.com/insulation-r-value-chart.aspx
- https://www.ecostarinsulation.ca/blog/insulation-r-value
- https://www.jlconline.com/how-to/insulation/q-a-compressing-fiberglass-batts_o
- https://homesteady.com/info-12279048-batt-roll-insulation-sizes.html
- https://pricewiseinsulation.com.au/blog/installing-75mm-insulation-in-70mm-cavity/
- https://airflowacademy.com/r38-insulation-thickness/
- https://www.jm.com/en/homeowner-insulation/homeowner-faq/what-r-value-do-i-need-/
- https://www.houzz.com/discussions/2595501/help-r-38-or-r-49-insulation-in-dc-metro-area-renovationl
- https://www.homedepot.com/b/Building-Materials-Insulation-Fiberglass-Insulation/R38/1025-in/N-5yc1vZbay7Z1z0qwetZ1z18mgf