Knauf Rigid Fiberglass Insulation Board, Unfaced, 24 in x 48 in x 1-1/2 in (144 sq ft) – KN4426E
Regular price $146.77Unfaced rigid fiberglass insulation board (24" x 48" x 1-1/2")
Knauf rigid unfaced fiberglass insulation board delivers reliable thermal and acoustical performance for a wide range of building applications. The 24 in x 48 in x 1-1/2 in boards are easy to handle and install for a clean, finished look while helping improve energy efficiency and noise reduction.
Key Features:
- Thermal + Sound Control: R-6.5 insulation value with strong acoustical performance for more comfortable, quieter spaces.
- Unfaced Fiberglass Board: Designed for applications where a facing is not desired, with a neat, professional finish.
- Versatile Application Use: Suitable for attic, basement, ceiling, crawlspace, floor, wall, and other common building assemblies.
- Easy Handling and Fast Install: Rigid board format installs quickly and stays stable for a polished appearance.
- High Temperature Capability: Rated up to 400°F for use in demanding conditions where higher heat resistance is needed.
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Product Type | Rigid Board Insulation |
| Material | Fiberglass |
| Facing Type | Unfaced |
| Width | 24 in |
| Length | 48 in |
| Thickness | 1-1/2 in |
| Coverage Area | 144 sq-ft |
| R-Value | R-6.5 |
| Temperature Rating | 400 deg F |
| Color | Brown |
| Density | 1.6 pcf |
| Installation Type | Attic, Basement, Ceiling, Crawlspace, Floor, Wall |
| Resists | Tear |
| Additional Information | Staple-Free, #6 pcf Density |
| Series | Pro Cut Series |
| Sub Brand | Earthwool® |
Frequently Asked Questions (FAQ):
Q: What are the board dimensions and total coverage?
A: Each board is 24 in x 48 in x 1-1/2 in, and the listed coverage area is 144 sq ft.
Q: Is this insulation faced?
A: No—this product is unfaced.
Q: What R-value does this board provide?
A: It is rated R-6.5.
Q: Where can this rigid board be installed?
A: It’s listed for use in attic, basement, ceiling, crawlspace, floor, and wall applications.
Q: What is the maximum temperature rating?
A: The temperature rating is 400°F.
Quietly Luxurious Comfort, Hidden in Plain Sight
Think of this rigid board as the unseen layer that makes a room feel undeniably refined—warmer, quieter, and more composed. The unfaced, clean-edged profile creates a crisp, streamlined look that plays beautifully in utility-forward spaces where finish matters. Use it behind wall systems or in ceilings to soften sound and sharpen comfort without adding visual clutter. It’s the kind of practical elegance that elevates everyday living into something truly luxe.
Upgrade comfort and quiet—choose Knauf unfaced rigid fiberglass board insulation for dependable performance where it matters most.
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