Knauf EcoBatt Pro Cut R-21 Unfaced Fiberglass Batt Insulation, 23 in x 93 in (103.98 sq-ft)
R-21 Unfaced Fiberglass Batt Insulation (23 in x 93 in)
Knauf® high-density unfaced fiberglass batt insulation delivers R-21 thermal performance and added sound control for framed construction. Designed to cut easily and recover to full thickness for a snug, staple-free fit in walls, floors, and ceilings.
Key Features:
- High Thermal + Acoustic Performance: R-21 fiberglass batt helps maintain indoor comfort while absorbing excess noise.
- Fast, Clean Handling: Cuts easily, resists tearing, and installs quickly with low dust.
- Snug Fit Recovery: Highly resilient batt rebounds to full thickness for consistent cavity fill.
- Unfaced Flexibility: Unfaced design allows specifier choice of vapor retarder as required.
- Staple-Free Installation: Engineered to friction-fit in standard framing applications.
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | R-21 |
| Product Type | Fiberglass batt insulation |
| Facing Type | Unfaced |
| Material | Fiberglass |
| Width | 23 in |
| Length | 93 in |
| Thickness | 5-1/2 in |
| Coverage Area | 103.98 sq-ft |
| Color | Brown |
| Series | Pro Cut Series |
| Sub-Brand | Performance+® |
| Installation Locations | Attic; Basement; Ceiling; Crawlspace; Floor; Wall |
| Temperature Rating | 400 deg F |
| Resistance | Tear |
| Installation Attribute | Staple-Free |
| Fire Test Standard | ASTM E84 |
| Fire Hazard Classification | 25/50 or less |
| Proposition 65 Warning | California Residents: Proposition 65 Warning www.P65Warnings.ca.gov |
Frequently Asked Questions (FAQ):
Q: Where can this batt insulation be installed?
A: Suitable for attic, basement, ceiling, crawlspace, floor, and wall applications in wood or metal framed construction.
Q: Is it faced or unfaced?
A: This product is unfaced, allowing you to pair it with an appropriate vapor retarder where required by design/code.
Q: What R-value and thickness does it have?
A: It is R-21 insulation with a listed thickness of 5-1/2 inches.
Q: How much area does one unit cover?
A: It covers 103.98 sq-ft.
Q: Is it rated for fire performance testing?
A: When tested to ASTM E84, it is listed with a Fire Hazard Classification of 25/50 or less.
Quiet Comfort, Seamlessly Layered
True luxury starts with what you feel—steady warmth, softened sound, and rooms that hold their calm. This high-density, unfaced fiberglass batt brings a clean, tailored performance to the bones of your space, filling cavities with a resilient, snug recovery that reads as effortless. Use it to elevate bedrooms, media rooms, and shared walls where serenity matters most. It’s the behind-the-scenes essential that makes every finish feel more refined.
Upgrade your comfort and quiet with Knauf® R-21 unfaced batts—add to cart to insulate your next wall, floor, or ceiling project with confidence.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
R-21 Unfaced Fiberglass Batt Insulation (23 in x 93 in)
Knauf® high-density unfaced fiberglass batt insulation delivers R-21 thermal performance and added sound control for framed construction. Designed to cut easily and recover to full thickness for a snug, staple-free fit in walls, floors, and ceilings.
Key Features:
- High Thermal + Acoustic Performance: R-21 fiberglass batt helps maintain indoor comfort while absorbing excess noise.
- Fast, Clean Handling: Cuts easily, resists tearing, and installs quickly with low dust.
- Snug Fit Recovery: Highly resilient batt rebounds to full thickness for consistent cavity fill.
- Unfaced Flexibility: Unfaced design allows specifier choice of vapor retarder as required.
- Staple-Free Installation: Engineered to friction-fit in standard framing applications.
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | R-21 |
| Product Type | Fiberglass batt insulation |
| Facing Type | Unfaced |
| Material | Fiberglass |
| Width | 23 in |
| Length | 93 in |
| Thickness | 5-1/2 in |
| Coverage Area | 103.98 sq-ft |
| Color | Brown |
| Series | Pro Cut Series |
| Sub-Brand | Performance+® |
| Installation Locations | Attic; Basement; Ceiling; Crawlspace; Floor; Wall |
| Temperature Rating | 400 deg F |
| Resistance | Tear |
| Installation Attribute | Staple-Free |
| Fire Test Standard | ASTM E84 |
| Fire Hazard Classification | 25/50 or less |
| Proposition 65 Warning | California Residents: Proposition 65 Warning www.P65Warnings.ca.gov |
Frequently Asked Questions (FAQ):
Q: Where can this batt insulation be installed?
A: Suitable for attic, basement, ceiling, crawlspace, floor, and wall applications in wood or metal framed construction.
Q: Is it faced or unfaced?
A: This product is unfaced, allowing you to pair it with an appropriate vapor retarder where required by design/code.
Q: What R-value and thickness does it have?
A: It is R-21 insulation with a listed thickness of 5-1/2 inches.
Q: How much area does one unit cover?
A: It covers 103.98 sq-ft.
Q: Is it rated for fire performance testing?
A: When tested to ASTM E84, it is listed with a Fire Hazard Classification of 25/50 or less.
Quiet Comfort, Seamlessly Layered
True luxury starts with what you feel—steady warmth, softened sound, and rooms that hold their calm. This high-density, unfaced fiberglass batt brings a clean, tailored performance to the bones of your space, filling cavities with a resilient, snug recovery that reads as effortless. Use it to elevate bedrooms, media rooms, and shared walls where serenity matters most. It’s the behind-the-scenes essential that makes every finish feel more refined.
Upgrade your comfort and quiet with Knauf® R-21 unfaced batts—add to cart to insulate your next wall, floor, or ceiling project with confidence.
