Insulation Batt Insulation
ROCKWOOL Comfortbatt
ROCKWOOL Comfortbatt is the brand's residential thermal stone wool batt line for exterior wall cavities, exposed floors, basements, crawlspaces, and attic or cathedral-ceiling applications.
Material
stone wool
Construction
semi-rigid batt
Applications
exterior wall cavities, exposed floors, basements and crawlspaces, attics, cathedral ceilings
Sizing Families
wood stud 16 in oc: 15.25 x 47 in. · wood stud 24 in oc: 23 x 47 in. · steel stud 16 in oc: 16.25 x 48 in. · steel stud 24 in oc: 24.25 x 48 in.
Thermal Lineup
13, 15, 21, 23, 30, 38
Density Lb Per Cuft
> 1.8
Model Comparison
6 models
| Specification | 13 | 15 | 21 | 23 | 30 | 38 |
|---|---|---|---|---|---|---|
| Model | Comfortbatt R-13 | Comfortbatt R-15 | Comfortbatt R-21 | Comfortbatt R-23 | Comfortbatt R-30 | Comfortbatt R-38 |
| nominal_thickness_in | 3.5" | 3.5" | 5.5" | 5.5" | 7.25" | 9.5" |
| typical_application | 2x4 exterior walls | 2x4 exterior walls, higher-R cavity fill | 2x6 exterior walls | 2x6 exterior walls, higher-R cavity fill | deep framed cavities, roof and ceiling applications | attics and cathedral ceilings |
| available_dimensions_note | Line-level USA data sheet publishes wood-stud 15.25 x 47 in. and 23 x 47 in. plus steel-stud 16.25 x 48 in. and 24.25 x 48 in. sizes. | Line-level USA data sheet publishes wood-stud 15.25 x 47 in. and 23 x 47 in. plus steel-stud 16.25 x 48 in. and 24.25 x 48 in. sizes. | Line-level USA data sheet publishes wood-stud 15.25 x 47 in. and 23 x 47 in. plus steel-stud 16.25 x 48 in. and 24.25 x 48 in. sizes. | Line-level USA data sheet publishes wood-stud 15.25 x 47 in. and 23 x 47 in. plus steel-stud 16.25 x 48 in. and 24.25 x 48 in. sizes. | Line-level USA data sheet publishes wood-stud 15.25 x 47 in. and 23 x 47 in. plus steel-stud 16.25 x 48 in. and 24.25 x 48 in. sizes. | Product page explicitly calls out 9.5 in. thick R-38 options; line-level USA data sheet publishes wood-stud and steel-stud batt size families. |
Shared Specifications
All models| material | stone wool |
| construction | semi-rigid batt |
| applications | exterior wall cavities, exposed floors, basements and crawlspaces, attics, cathedral ceilings |
| sizing_families | wood stud 16 in oc: 15.25 x 47 in. · wood stud 24 in oc: 23 x 47 in. · steel stud 16 in oc: 16.25 x 48 in. · steel stud 24 in oc: 24.25 x 48 in. |
| thermal_lineup | 13, 15, 21, 23, 30, 38 |
| density_lb_per_cuft | > 1.8 |
| fire_performance | flame spread index: 0 · smoke developed index: 0 · non combustible: true · test standards: ASTM E84,ASTM E136 |
| compliance | ASTM C665 Type 1, CAN/ULC S702 Type 1 |
| moisture_and_durability | water vapor sorption vol pct: 0.05 · fungi resistance: Passed |
| certifications | UL Classified, UL GREENGUARD Gold, USDA BioPreferred 25% |
| feature_notes | Flexible edge designed to compress during installation and spring back against framing, Water and moisture resistant, Inorganic and does not promote mold growth |