Owens Corning Thermafiber UltraBatt R-15, 3.5 in. x 23 in. x 47 in. (16 Bags)Thermafiber UltraBatt R 15 Mineral Wool Insulation, 3. 5 x 23 x 47 in Professional grade mineral wool batts engineered for thermal, fire, and acoustic performance. Sized at 3. 5 x 23 x 47 inches and packaged as 16 bags, they install easily in exterior or interior wall cavities while resisting moisture, mold, and corrosion. Key Features: High Thermal Performance: R 15 mineral wool batts help improve energy efficiency in wall cavities Fire Resistant:

Thermafiber UltraBatt R-15 Mineral Wool Insulation, 3.5 x 23 x 47 in

Professional-grade mineral wool batts engineered for thermal, fire, and acoustic performance. Sized at 3.5 x 23 x 47 inches and packaged as 16 bags, they install easily in exterior or interior wall cavities while resisting moisture, mold, and corrosion.

---

Key Features:

• High Thermal Performance: R-15 mineral wool batts help improve energy efficiency in wall cavities
• Fire Resistant: Non-combustible fibers provide added fire protection for residential and light commercial projects
• Sound Control: Dense semi-rigid construction helps reduce noise transmission between rooms
• Moisture and Mold Resistant: Fibers resist moisture absorption, corrosion, and mold growth for long-term durability
• Easy Installation: Pre-cut 23 in. width fits common stud spacing and semi-rigid form stays in place

Please check the Product Data Sheet Here

---

Specifications Table:

Specification	Details
Insulation Type	Mineral wool (Thermafiber UltraBatt)
R-Value	R-15
Thickness	3.5 in
Width	23 in
Length	47 in
Package Quantity	16 bags
Application	Exterior and interior walls; residential and light commercial
Fire Resistance	Non-combustible mineral wool; meets ASTM standards (per manufacturer literature)

---

Frequently Asked Questions (FAQ):

Q: What is the size and R-value of each batt?
A: Each batt is 3.5 in. thick by 23 in. wide by 47 in. long with an R-15 thermal rating.

---

Q: Is this insulation fire resistant?
A: Yes, the mineral wool fibers are non-combustible and provide enhanced fire resistance.

---

Q: Where can I use these batts?
A: Ideal for exterior or interior wall cavities in residential and light commercial construction.

---

Q: Does it resist moisture and mold?
A: Yes, mineral wool resists moisture absorption and is not a food source for mold.

---

Q: How many bags are included?
A: This listing is for a total of 16 bags.

---

Tailored Warmth with Acoustic Calm

UltraBatt brings a refined quiet and steady comfort to the home—clean-lined performance behind the walls that lets design sing. I love its dense, mineral composition; it tucks neatly into studs and instantly elevates acoustics. Pair it with richly textured wall finishes to craft spaces that feel hushed and luxe. It’s a discreet essential for polished, high-performance living.

---

Upgrade your walls with R-15 UltraBatt mineral wool today for quieter, safer, and more energy‑efficient spaces.