R-25-class performance in nominal 2x10-depth cavities on 24 in. o.c.
Key features
Full 24 in. width for predictable edge contact in production floor and ceiling framing
Unfaced + Next Gen handling for coordinated air/vapor details in mid-rise wood construction
Technical specifications
| R-Value | 25.0 |
|---|---|
| Thickness | 8.0 in |
| Width | 24.0 in |
| Length | 96.0 in |
| Coverage | 96.0 sq ft/pack |
| Material | Fiberglass (Owens Corning PINK Next Gen™ Fiberglas®, unfaced) |
| Fire rating | ASTM C665 Type I; glass (unfaced) classified noncombustible per ASTM E136. Coordinate rated assemblies with your AHJ when combining with facings, membranes, or foam. |
| Sound rating | Unfaced cavity-fill fiberglass improves typical assembly acoustics versus an empty cavity; field STC depends on framing, openings, and flanking paths. |
| Density | R-25 preformed batt; supplier part 111693 per IDI / Owens Corning listings |
| Thermal conductivity | Nominal R-value at full labeled thickness; see manufacturer TDS for tested thermal values. |
| Framing width | 24 in. width for nominal 24 in. on-center framing in nominal 2×10-depth cavities |
| Construction type | Wood-frame and light-gauge metal-frame cavity construction |
| Application area | Wood- or metal-framed floors and ceilings in nominal 2×10-depth cavities on 24 in. o.c.; roof decks when assembly thickness and spec allow; coordinate vapor control per designer |
Product details
C28 fills the practical gap between commodity R-19 in 2×8 assemblies and heavy R-30+ packages in 2×12 rafters: an 8 in. thick, 24 in. wide, 96 in. long unfaced batt sized for nominal 2×10-depth cavities on 24 in. centers. At roughly 96 square feet per package (IDI), estimators get a clean multiplier for podium slabs, wood-framed hotels, and light industrial second floors where the structural package stayed at 2×10 but the energy model still wants a stronger floor/ceiling U-factor.
Unfacing preserves designer control over vapor retarders when this layer sits near conditioned space over parking, unheated storage, or vented crawl zones. Compliance follows the PINK Next Gen bundle: ASTM C665 manufacturing, ASTM E136 noncombustibility for unfaced glass, Title 24 Article 3 language, GREENGUARD validation, and EPD references.
Field teams should watch for crushing at web holes and rim channels, maintain dry storage, and recover full labeled thickness—R-25 performance disappears fast when batts get pancaked behind utilities or at bearing stiffeners.
Documents & certifications
Technical data sheet
Manufacturer-tested R-value, coverage, fire notes, and handling—use for submittals, RFIs, and field QA.
Download PDF (opens in new tab)Certifications & compliance
GREENGUARD Certified (formaldehyde-free validated), UL Environment EPD, California Title 24 Article 3 insulating materials, ENERGY STAR® certified per manufacturer listings
Frequently asked questions
Is 48 in. length enough for my floor joist layout?
Is 48 in. length enough for my floor joist layout?
48 in. batts suit common joist spacing with staggered joints per manufacturer guidance; verify bay lengths and splice pattern on your plans.
Can I leave this exposed in a crawlspace?
Can I leave this exposed in a crawlspace?
Exposed use depends on code and assembly; many crawlspaces require a protective covering or ignition barrier—confirm with your AHJ.
Does R-19 in a 2x8 floor meet my local code?
Does R-19 in a 2x8 floor meet my local code?
Prescriptive R-values vary by climate zone and project type; compare published cavity R to your jurisdiction’s table or modeled performance path.
What submittal PDF should I attach?
What submittal PDF should I attach?
The current Owens Corning PINK Next Gen technical data sheet revision for this SKU.