93 in. length aligned with common pre-cut stud and modular wall workflows
Key features
Kraft facing for code-coordinated vapor retarder placement when details allow
R-15 labeled performance in a 3.5 in. thick batt for 2×4 cavities
Technical specifications
| R-Value | 15.0 |
|---|---|
| Thickness | 3.5 in |
| Width | 15.0 in |
| Length | 93.0 in |
| Coverage | 67.81 sq ft/pack |
| Material | Fiberglass (PINK Next Gen), kraft-faced |
| Fire rating | ASTM C665; glass fibers ASTM E136 noncombustible when unfaced. Kraft facing is combustible—orient facing per IECC, IRC, and local amendments; kraft-faced PINK Next Gen acceptable ICC construction types III, IV, and V per OC literature. |
| Sound rating | Cavity-fill fiberglass improves typical wall STC versus an empty cavity; assembly STC depends on studs, layers, and openings. |
| Density | Light-density flexible batt per ASTM C665 manufacturer listings; see TDS for product-specific values. |
| Thermal conductivity | See manufacturer TDS (ASTM C518) for tested thermal conductivity at labeled R-value. |
| Framing width | 15 in. width for 16 in. on-center stud spacing in nominal 2×4 walls. |
| Construction type | Wood-frame and light-gauge metal-frame cavity construction |
| Application area | Wood- and metal-framed walls, floors, roof/ceilings; interior side of basement and unvented crawlspace walls per code and OC literature. |
Product details
About 67.81 square feet per package (IDI-listed coverage). Primary use: nominal 2×4 exterior and partition walls on 16 in. on-center framing where the specifier selects kraft-faced R-15 cavity fill and wants 93 in. batt lengths aligned with commercial pre-cut stud workflows and modular eight-foot-ish wall heights.
ME21 packages PINK Next Gen Fiberglas at 3.5 in. labeled thickness for R-15 performance, 15 in. width for the common 14-1/2 in. clear bay, and 93 in. length as the distributor-listed module. Kraft facing supports Class I vapor-retarder detailing when oriented per code—pair disciplined cavity fit with continuous air barrier work at rim, sill, and penetration clusters.
From a building science perspective, kraft is not a substitute for air sealing; it is a vapor-control layer that must agree with your climate zone, exterior foam strategy, and interior finish sequence.
Manufactured to ASTM C665; glass fibers are treated as noncombustible per ASTM E136 when unfaced in manufacturer documentation, while kraft facing is combustible—follow OC guidance for protection and hot-work rules. Kraft-faced PINK Next Gen is listed for ICC construction types III, IV, and V when used as documented. GREENGUARD certification with formaldehyde-free validation and a UL Environment EPD support typical submittals.
Commercial corridors and TI projects often standardize on 93 in. packs because they match pre-cut stud ordering; still verify plate lines after slab tolerance before locking truck counts.
Submittal discipline: keep the distributor-listed dimensions (3.5 in. × 15.0 in. × 93.0 in.) and about 67.81 square feet per package attached to the same SKU on purchase orders, delivery tickets, and photos for QA. Authoritative tested language and code-oriented statements belong in the current manufacturer technical data sheet at https://www.idi-insulation.com/media/pdfresources/1004362_data_sheet.pdf.
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 (formaldehyde-free validated), UL Environment EPD, California Title 24 Article 3 insulating materials
Frequently asked questions
ME21 versus ME22 at the same dimensions—which do I need?
ME21 versus ME22 at the same dimensions—which do I need?
ME21 is kraft-faced; ME22 is unfaced at the same 3.5 × 15 × 93 in. geometry per IDI listings. Choose kraft when your assembly calls for integrated factory vapor retarder facing; choose unfaced when vapor control lives on another layer.
Why is coverage different between kraft and unfaced ME SKUs at similar sizes?
Why is coverage different between kraft and unfaced ME SKUs at similar sizes?
Pieces per package and bundle geometry differ by SKU even when labeled thickness is similar. Always bid from the distributor-listed square feet per package for the exact item number on the purchase order.
Can I use ME21 in metal studs?
Can I use ME21 in metal studs?
Owens Corning literature lists metal-framed cavity applications for PINK Next Gen batts, but thermal bridging and compliant liner requirements differ from wood framing. Coordinate with your energy consultant and the current data sheet.
How should I staple kraft flanges?
How should I staple kraft flanges?
Follow Owens Corning installation guidance and jobsite QA standards for flange stapling versus inset stapling so you do not tear facing or create unsealed bypasses at the perimeter.