Table of Contents
10.25” R-Value Thickness Bags / 1000 Sq Ft R49 16.25” 22.6 R44 14.75” 20.1 R38 12.75” 16.8 R30 10.25” 13.0.
How thick is R30 insulation?
8¼ ” thick, R-30C EcoTouch® Thermal Batt insulation prevents moisture damage and helps assure long roof life by providing 1″ of ventilation air space between the insulation and roof deck.
What is the R-value of 10 inches of blown insulation?
R-value of Materials and Depths Material R-value/in 10″ Fiberglass (batt) 3.1 – 3.4 31.0 – 34.0 Fiberglass blown (attic) 2.2 – 4.3 22.0 – 43.0 Fiberglass blown (wall) 3.7 – 4.3 37.0 – 43.0.
What is the R-value of 14 inches of blown insulation?
Warm Climates (R-30 to R-49): Fiberglass (blown): 14” – 18” Fiberglass (batts): 11” – 14” Cellulose (blown): 11” – 13”.
What is the R-value of 8 inches of blown insulation?
Blown-in fiberglass has an R-value of 2.2 to 2.7 per inch.
How wide is R30 insulation?
Owens Corning 30 Attic 88-sq ft Faced Fiberglass Batt Insulation (24-in W x 48-in L) Individual Pack 1 total.
Can I use R30 in walls?
R-30 fiberglass insulation is designed to be in a roof or ceiling cavity framed with 2x10s. It is way too thick for 2×4 walls.
How many inches of blown insulation should be in my attic?
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 a good R-value for blown in insulation?
The R-Value of Common Insulation Materials Blown-in fiberglass – Blown loosely into attics or tightly into walls, blown-in fiberglass is ideal for existing homes that need extra insulation. It takes minimal remodeling to install and offers an R-value of 2.2 to 4.3 per inch, depending on how tightly it is packed.
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 R30 insulation used for?
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.
How do you measure for blown in insulation?
Cellulose blow-in insulation is constructed out of recycled paper. To determine how much cellulose insulation you need, take the square footage of the space and divide it by either the depth or the desired R-value.
What insulation has the highest R-value per inch?
Vacuum insulated panels have the highest R-value, approximately R-45 (in U.S. units) per inch; aerogel has the next highest R-value (about R-10 to R-30 per inch), followed by polyurethane (PUR) and phenolic foam insulations with R-7 per inch.
What insulation fits in a 2×8 wall?
Two-by-Eight Floor Joists Fiberglass R-19 batt insulation is about 6 inches thick and is available in 15-inch widths, making it the correct size for insulating a two-by-eight floor joist system.
Can you put too much insulation in your attic?
It’s possible to over-insulate an attic as too much will cause moisture buildup and eventually result in mold. Eventually, adding more insulation leads to diminishing returns in trapping heat as well.
What is a good R-value for exterior walls?
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.
How many square feet are in a bag of R30 insulation?
x 48 in. Batts (88 sq ft/bag).
Is R30 insulation good for sound?
In addition, EcoTouch insulation is designed to improve the Sound Transmission Class (STC) of walls and floor/ceiling assemblies. R-30 EcoTouch Insulation is recommended for attics, floors, ceilings and un-conditioned crawl spaces.
Can you put too much insulation in your walls?
It is possible to over-insulate your house so much that it can’t breathe. The whole point of home insulation is to tightly seal your home’s interior. But if it becomes too tightly sealed with too many layers of insulation, moisture can get trapped inside those layers. That’s when mold starts to grow.
How do I know what insulation to use?
Measure the area needing insulation. Measure the length and width of the area you need to insulate. Multiply the length times the width to determine the square footage of the space. Decide on the type of insulation to use.
How many inches of blown-in cellulose insulation do I need?
With blown-in cellulose insulation, that would require insulation to a depth of 10 inches. If there is already insulation, measure the current depth and subtract to determine the amount needed to bring the attic to the recommended level for the desired R-Value.
Is blown-in insulation cheaper than rolls?
The Differences Between Blown-in and Rolled Insulation The lower the R-value is, the less effective it will be as insulation – although it will be cheaper as well. In such situations, blown-in insulation is much more effective since it allows you to easily insulate those hard to reach areas.
How many bags of blown-in insulation will I need?
More on Calculating Insulation Needs Divide the measured square footage you obtained by 1,000 square feet to obtain the multiplication factor: 1,500 square feet/1,000 square feet = 1.5. Multiply the R-value chart number to obtain the number of bags (rounding up at the end): 40.8 * 1.5 = 61.2 or 62 bundles.
