JM (Johns Manville) R-21 Kraft-Faced Fiberglass Batt Insulation, 23 in x 93 in, 103.97 sq ft
R-21 Kraft-Faced Fiberglass Batt Insulation (23" x 93", 103.97 sq ft)
JM Kraft-faced fiberglass batt insulation provides R-21 thermal performance with a built-in kraft vapor retarder to help manage moisture in concealed wall applications. Pre-cut batts fit 2x6 wood-stud framing and can also help reduce sound transmission for a quieter, more comfortable home.
Key Features:
- Built-In Vapor Retarder: Kraft facing helps control moisture in concealed wall applications.
- Designed for 2x6 Framing: Pre-cut batts sized for 24-in on-center wood-stud cavities and standard 8-ft walls.
- Energy & Comfort Upgrade: R-21 thermal performance helps improve HVAC efficiency and indoor comfort.
- Sound Control Benefit: Fiberglass batts help reduce sound transmission through walls.
- Easy Staple-Tab Installation: Press-fit between studs; staple flanges/tabs when additional securement is needed.
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | R-21 |
| Product Dimensions (W x L) | 23 in x 93 in |
| Coverage Area | 103.97 sq ft |
| Insulation Type | Fiberglass batt |
| Facing | Kraft faced |
| Thickness | 5.5 in |
| R-Value per Inch | 3.8181 |
| Stud Spacing | 24 in on-center |
| Fits Wall Size | 2 x 6 walls |
| Framing Type | Wood studs |
| Sound Barrier | Yes |
| Vapor Retardant | Yes |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| For Use in Walls | Yes |
| For Use in Basements | Yes |
| For Use in Crawlspaces | Yes |
| For Use in Attics | No |
| For Use in Ceilings | No |
| For Use in Floors | No |
| For Use in Doors | No |
| For Use in Duct | No |
| For Use in Electrical | No |
| For Use in Garage Doors | No |
| For Use in Masonry | No |
| For Use in Plumbing | No |
| For Use in Vents | No |
| For Use in Windows | No |
| Fits 2 x 4 Walls | No |
| Will Not Rot/Mildew/Deteriorate; Noncorrosive | Yes |
| Package Weight | 47.3 lb |
| Bag Dimensions (L x W x D) | 23.5 x 20 x 49 |
| Package Type | Multi-pack |
| Package Count | 7 |
| Total Package Quantity | 28 |
| Multi-Pack Quantity | 4 |
| Warranty | 1-year limited |
| UNSPSC | 11162400 |
| CA Residents Prop 65 Warning(s) | No |
Frequently Asked Questions (FAQ):
Q: What wall framing does this insulation fit?
A: It’s sized for 2x6 wood-stud walls with 24-in on-center spacing.
Q: Does it include a vapor barrier?
A: Yes—this is kraft-faced insulation, which functions as a vapor retarder for moisture control in appropriate applications.
Q: Can I use it in basements or crawlspaces?
A: Yes; it is listed for use in basements and crawlspaces (and also for walls).
Q: How do I install these batts?
A: Press the batt between studs; staple the kraft facing tabs to the framing if additional securement is needed.
Q: Is it formaldehyde-free and indoor-air certified?
A: It is listed as formaldehyde-free and GREENGUARD Gold Certified.
Quiet Luxury Starts Behind the Walls
There’s a subtle kind of glamour in a home that feels effortlessly calm—warm in winter, cool in summer, and beautifully hushed. These kraft-faced fiberglass batts bring that confidence with R-21 performance and a built-in vapor retarder that supports comfort in the places you don’t see but always feel. Use them to refine 2x6 exterior walls and basement spaces, then finish with textured plaster, wood paneling, or tailored millwork for a space that reads serene and intentional. It’s the kind of foundational upgrade that makes everyday living feel distinctly elevated.
Upgrade your 2x6 walls with JM R-21 kraft-faced batts for lasting comfort, moisture control, and quieter rooms.
Original: $120.63
-70%$120.63
$36.19Product Information
Product Information
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Description
R-21 Kraft-Faced Fiberglass Batt Insulation (23" x 93", 103.97 sq ft)
JM Kraft-faced fiberglass batt insulation provides R-21 thermal performance with a built-in kraft vapor retarder to help manage moisture in concealed wall applications. Pre-cut batts fit 2x6 wood-stud framing and can also help reduce sound transmission for a quieter, more comfortable home.
Key Features:
- Built-In Vapor Retarder: Kraft facing helps control moisture in concealed wall applications.
- Designed for 2x6 Framing: Pre-cut batts sized for 24-in on-center wood-stud cavities and standard 8-ft walls.
- Energy & Comfort Upgrade: R-21 thermal performance helps improve HVAC efficiency and indoor comfort.
- Sound Control Benefit: Fiberglass batts help reduce sound transmission through walls.
- Easy Staple-Tab Installation: Press-fit between studs; staple flanges/tabs when additional securement is needed.
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | R-21 |
| Product Dimensions (W x L) | 23 in x 93 in |
| Coverage Area | 103.97 sq ft |
| Insulation Type | Fiberglass batt |
| Facing | Kraft faced |
| Thickness | 5.5 in |
| R-Value per Inch | 3.8181 |
| Stud Spacing | 24 in on-center |
| Fits Wall Size | 2 x 6 walls |
| Framing Type | Wood studs |
| Sound Barrier | Yes |
| Vapor Retardant | Yes |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| For Use in Walls | Yes |
| For Use in Basements | Yes |
| For Use in Crawlspaces | Yes |
| For Use in Attics | No |
| For Use in Ceilings | No |
| For Use in Floors | No |
| For Use in Doors | No |
| For Use in Duct | No |
| For Use in Electrical | No |
| For Use in Garage Doors | No |
| For Use in Masonry | No |
| For Use in Plumbing | No |
| For Use in Vents | No |
| For Use in Windows | No |
| Fits 2 x 4 Walls | No |
| Will Not Rot/Mildew/Deteriorate; Noncorrosive | Yes |
| Package Weight | 47.3 lb |
| Bag Dimensions (L x W x D) | 23.5 x 20 x 49 |
| Package Type | Multi-pack |
| Package Count | 7 |
| Total Package Quantity | 28 |
| Multi-Pack Quantity | 4 |
| Warranty | 1-year limited |
| UNSPSC | 11162400 |
| CA Residents Prop 65 Warning(s) | No |
Frequently Asked Questions (FAQ):
Q: What wall framing does this insulation fit?
A: It’s sized for 2x6 wood-stud walls with 24-in on-center spacing.
Q: Does it include a vapor barrier?
A: Yes—this is kraft-faced insulation, which functions as a vapor retarder for moisture control in appropriate applications.
Q: Can I use it in basements or crawlspaces?
A: Yes; it is listed for use in basements and crawlspaces (and also for walls).
Q: How do I install these batts?
A: Press the batt between studs; staple the kraft facing tabs to the framing if additional securement is needed.
Q: Is it formaldehyde-free and indoor-air certified?
A: It is listed as formaldehyde-free and GREENGUARD Gold Certified.
Quiet Luxury Starts Behind the Walls
There’s a subtle kind of glamour in a home that feels effortlessly calm—warm in winter, cool in summer, and beautifully hushed. These kraft-faced fiberglass batts bring that confidence with R-21 performance and a built-in vapor retarder that supports comfort in the places you don’t see but always feel. Use them to refine 2x6 exterior walls and basement spaces, then finish with textured plaster, wood paneling, or tailored millwork for a space that reads serene and intentional. It’s the kind of foundational upgrade that makes everyday living feel distinctly elevated.
Upgrade your 2x6 walls with JM R-21 kraft-faced batts for lasting comfort, moisture control, and quieter rooms.
