R-28 Johns Manville Fiberglass 8-1/2
Vendor: Johns Manville
FEATURES
- Effective resistance to heat transfer, with RSI/R-values up to RSI 4.9 (R-28) for wood stud and RSI 7.0 (R-50) for metal stud.
- Will not off-gas formaldehyde in the indoor environment.
- Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
- Flame Spread of 10 or less and Smoke Developed of 50 or less.
- No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
- Stable bonded glass fibres will not slump within the wall cavity, settle or break down during normal applications.
Last Modified: 2026-01-25
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Product Variations
| SKU | SKU / PART # | PRODUCT NAME | DIMENSIONS | SF / BAG |
|---|---|---|---|---|
| R-28 Johns Manville Fiberglass (Steel) | 8.5" X 16" X 48" | 42.67 | ||
| R-28 Johns Manville Fiberglass (Steel) | 8.5" X 24" X 48" | 64 | ||
| R-28 Johns Manville Fiberglass (Wood) | 8.5" X 11.5" X 48" | 61.33 | ||
| R-28 Johns Manville Fiberglass (Wood) | 8.5" X 15" X 48" | 40 | ||
| R-28 Johns Manville Fiberglass (Wood) | 8.5" X 19" X 48" | 50.67 | ||
| R-28 Johns Manville Fiberglass (Wood) | 8.5" X 23" X 48" | 61.33 |
ADDITIONAL INFORMATION
