| 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 R-value of batt insulation?
Standard batts have an R-value of
R-2.9 to R-3.8 per inch
. Cellulose insulation is a type that is typically blown into place. Cellulose insulation R-value is R-3.2 to R-3.8 per inch. Batt insulation can be made of fiberglass, mineral wool, plastic fibers or natural fibers.
What is the R-value per inch of batt insulation?
Blown-in fiberglass has an R-value of
2.2 to 2.7 per inch
. Batts. Fiberglass batts and rolls are ideal for placement between framing during construction in floors, walls, attics, and ceilings. They’re denser than blown-in insulation, offering an R-value of up to 4.3 per inch.
What is the R-value of 8 inches of fiberglass insulation?
| Thickness (inches) R-Value Cost (cents/sq. ft.) | 6 to 6 1/4 19 27-34 | 5 1/4 (high density) 21 33-39 | 8 to 8 1/2 25 37-45 | 8 (high density) 30 45-49 |
|---|
How many inches of insulation is R30?
| 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 |
|---|
What is the thinnest insulation with the highest R-value?
Thermablok® Aerogel
is a revolutionary advancement in thermal technology offering the thinnest insulation available to prevent thermal and cold bridging. Classed as a Super Insulation, Aerogel has the highest insulation value of any known material with the lowest thermal conductivity value of any solid (0.015W/mK).
What is the difference between R19 and R30 insulation?
Insulation in your walls and ceilings slows down this heat transfer. … The bigger the R value, the better the insulation is at slowing down the heat transfer. So
R19 is better insulation than R13
, and R30 is better than R19. The larger the R value, the better the insulation value.
What is the highest R-value for 6 inch batt 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 highest R-value for insulation on 2×4 wall?
Fiberglass vats are the standard insulator for 2-inch by 4-inch wall framing, and are rated R-11 through R-15. In order to achieve the higher insulation R-value of
R-21
a different type of insulation will be required.
How long does batt insulation last?
Batt insulation, such as cellulose or fiberglass, can fall down from ceilings and crawl spaces after
about 15 years
. If this happens, any “blank spots” created might harbor mold growth. Over time, these gaps can become dirty or be bogged down by dust.
Which type of insulation is most effective?
Aerogel
is more expensive, but definitely the best type of insulation. Fiberglass is cheap, but requires careful handling. Mineral wool is effective, but not fire resistant. Cellulose is fire resistant, eco-friendly, and effective, but hard to apply.
What insulation has highest R-value?
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.
Does doubling insulation Double R-value?
Doubling the thickness
of insulation will double the insulation’s R-value
, cutting heat loss in half. Each time the insulation layer is doubled in thickness, this rule applies.
How thick is R30 insulation?
81⁄4 ” 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. Easy Installation R-30C EcoTouch® Thermal Batt insulation is easy to handle and install.
How thick is R60 insulation?
The average recommended level is
17 inches
of R60.
How thick is r21 batt insulation?
51⁄2 ” thick
R-21 EcoTouch® insulation delivers 19% more R-value than compressed 61⁄4 ” R-19 FiberglasTM insulation. The kraft facing on this insulation will burn and must not be left exposed.
