Knauf® R-21HD Kraft Faced Fiberglass Batt Insulation, 15 in x 93 in (67.81 sq-ft)
Regular price $90.83R-21 kraft-faced fiberglass batt insulation
Knauf® R-21 high-density fiberglass batt insulation with kraft facing helps improve thermal comfort and sound control in walls, floors, and ceilings. Designed for quick handling with tear resistance and fast recovery for a snug fit, it covers 67.81 sq-ft per package.
Key Features:
- High R-Value Performance: R-21 high-density fiberglass batt helps reduce heat transfer for improved comfort.
- Kraft Facing Vapor Retarder: Kraft facer provides a vapor permeance rating of 1.0 or less when properly installed behind an approved finish material.
- Fast, Clean Handling: Cuts easily, resists tears, and is designed to install quickly with low dust.
- Snug-Fit Resilience: Recovers quickly to full thickness to help fill cavities evenly.
- Broad Application Use: Suitable for attic, basement, ceiling, crawlspace, floor, and wall installations.
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | R-21 |
| Width | 15 in |
| Length | 93 in |
| Thickness | 5-1/2 in |
| Material | Fiberglass |
| Facing Type | Kraft |
| Coverage Area | 67.81 sq-ft |
| Color | Brown |
| Temperature Rating | 400 deg F |
| Installation Locations | Attic; Basement; Ceiling; Crawlspace; Floor; Wall |
| Resists | Tear |
| Additional Information | Staple-Free |
| Series | Pro Cut Series |
| Sub Brand | Performance+® |
| Vapor Transmission (Permeance) Rating | 1.0 or less |
| Sound Control | Excellent sound control; designed for partition walls or other applications where facing will be covered |
| Fire Safety Note | Kraft facing will burn and should not be left exposed; install kraft facing in contact with approved finish material |
Frequently Asked Questions (FAQ):
Q: What size cavities does this batt fit?
A: It’s 15 in wide and 5-1/2 in thick, designed for typical 2x6 wall/floor/ceiling cavities; length is 93 in per batt.
Q: Where can I install this insulation?
A: It’s listed for attic, basement, ceiling, crawlspace, floor, and wall applications.
Q: Does the kraft facing need to be covered?
A: Yes—kraft facing will burn and should not be left exposed; install it in contact with an approved finish material.
Q: What is the coverage per package?
A: One package covers 67.81 sq-ft.
Q: Is it a vapor retarder?
A: Yes—the kraft vapor retarder is noted as having a permeance rating of 1.0 or less.
Quiet confidence, wrapped in kraft
Think of this batt as the invisible luxury: a calmer, more tempered room that feels intentionally composed. The kraft-faced finish brings a crisp, tailored edge behind the walls—technical, yes, but also quietly refined. Use it to elevate bedrooms, studios, or media spaces where hush and comfort are part of the aesthetic. It’s the kind of behind-the-scenes essential that makes a home feel effortlessly elevated.
Upgrade comfort and sound control in your walls and ceilings with Knauf® R-21 kraft-faced high-density fiberglass batts.
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