Cold Climates (R-49 to R-60):
Fiberglass (batts): 14” – 19” Cellulose (blown): 14” – 18” Rock Wool (loose): 17” – 25”.
Page Contents
What insulation has the 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.
How many inches is R30 blown insulation?
Fiberglass Chart
| 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 highest R-value?
Aerogel insulation offers the highest R-value of any insulating material at less weight and thickness—ideal for construction, refineries, pipelines, and thin-gap thermal barriers.
What type of blown in insulation is best?
Fiberglass, cotton, and mineral wool can all work as loose-fill insulation material, but the far and away top choice for blown-in insulation is fiberglass. Contrary to batts insulation, blown-in fiberglass insulation is perfect for filling in tight voids around wiring, pipes, or any area with awkward framing.
How long does blown in insulation last?
How Long Does Blown in Attic Insulation Last? Regardless of what kind of insulation you choose, blown insulation is a permanent solution. Cellulose insulation lasts 20-30 years because it is made from recycled natural materials, whereas fiberglass materials will last much longer because it does not degrade.
What is the R-value of 2 inch foam board?
With an R-value of 13.1 for a 2″ thick sheet only two 2″ sheets are required to achieve R-25. 2. Extruded polystyrene or XPS (foam is usually pink or blue) XPS has an R-value of 5 per inch of thickness requiring 5″ of insulation to achieve R-25.
How many inches is R38 blown insulation?
Fiberglass Chart
| 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 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.
Can you put too much blown insulation in your attic?
Can you over insulate your attic? The answer is yes! Past a certain point, insulation in a vented attic will do more harm than good. In most of the United States, achieving an R-Value of 38 is more than sufficient.
What is the R-value of 12 inches of blown insulation?
Blown fiberglass installed in the attic has an R-value of 2.2 per inch, so 12 inches of it would give you an R-value of 26.4 in your attic installation project.
What R-value is 6 inches of insulation?
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 R-value is 12 inches of cellulose?
| R-value of Materials and Depths | ||
|---|---|---|
| Material | R-value/in | 12″ |
| Cellulose blown (attic) | 3.2 – 3.7 | 38.4 – 44.4 |
| Cellulose blown (wall) | 3.8 – 3.9 | 45.6 – 46.8 |
| Polystrene Board | 3.8 – 5.0 | 45.6 – 60.0 |
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.
What is the highest R-value for a 2×6 wall? Thermal Control
The installed insulation R-value for 2×6 fiberglass batt ranges between R-19 and R-21. When blown or sprayed cellulose insulation is used, the R-value is typically R-20 for 2×6 walls.
What insulation should I use for 6 inch walls? Use R-19 or R-21 kraft-faced fiberglass insulation for two-by-six (2×6) walls. This combination ensures that the insulation is neither too loose nor too tightly packed within the walls.
How many inches is r50 blown insulation?
R 50: Thickness that oscillates between 15 and 19 inches. R 60: Thickness that oscillates between 19 and 22 inches. R 70: Thickness that oscillates between 22 and 25 inches.
What is the R-value of 2 inch Styrofoam?
With an R-value of 13.1 for a 2″ thick sheet only two 2″ sheets are required to achieve R-25. 2. Extruded polystyrene or XPS (foam is usually pink or blue) XPS has an R-value of 5 per inch of thickness requiring 5″ of insulation to achieve R-25.
What is the R-value of 10 inches of blown insulation?
| R-value of Materials and Depths | ||
|---|---|---|
| Material | R-value/in | 10″ |
| Mineral Wool blown (wall) | 3.1 – 4.0 | 31.0 – 40.0 |
| Cellulose blown (attic) | 3.2 – 3.7 | 32.0 – 37.0 |
| Cellulose blown (wall) | 3.8 – 3.9 | 38.0 – 39.0 |
What is the R-value of 6 inches of cellulose?
Cellulose is not unusual in this regard. Like many insulation materials, it provides an R-value of approximately R-3.5 per inch of thickness.
What is the R-value of 2 inch blue foam?
A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.
What is the R-value of 1 inch spray foam?
This microscopic difference in the two products creates a dramatic difference in performance. Closed cell spray foam has an R-value of R-7 per inch. In comparison, open cell spray foam has an R-value of R-3.8 per inch.
What is the R-value of 1/2 inch Styrofoam?
STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F.
Can you have 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.
