Johns Manville R-23 TempControl unfaced mineral wool insulation batts deliver solid thermal performance for wood-stud cavities in exterior walls, basements, and heated crawlspaces. Available in all sizes, they combine high R-values with straightforward installation and long-lasting durability.

Key Features & Design

• Thermal performance: R-values up to R-30, with the batts shown here at R-23. Size options include 5.5 in x 15.25 in x 47 in (25 sq ft/bag) and 5.5 in x 23 in x 47 in (37.5 sq ft/bag).
• Material & type: Mineral wool TempControl batts, unfaced and noncombustible, designed to deliver thermal control and delay the spread of fire in wood-stud cavities.
• Fire & moisture resistance: Noncombustible, melting point in excess of 2000˚F (1093˚C). Flame Spread of 0 and Smoke Developed of 0.
• Durability: Durable inorganic glass; no growth of fungi. No sustaining of vermin.
• Standards & testing: ASTM Standards – ASTM C665 Type 1; Thermal Resistance ASTM C518 R-15, R-23, R-30; Flame Spread ASTM E84 0; Smoke Developed ASTM E84 0; Critical Radiant Flux ASTM E970 > 0.12 W/cm2 (0.11 Btu/ft2s); Water Vapor Sorption ASTM C1104 5% or less by weight; Odor Emission ASTM C1304 Pass; Corrosiveness ASTM C665 Pass; Fungi Resistance ASTM C1338 Pass; Combustion Characteristics ASTM E136 Pass.
• Applications: Designed to deliver thermal control and delay the spread of fire in wood-stud cavities of exterior walls, basements and heated crawlspaces.

Whether you’re upgrading an old build or insulating new construction, these TempControl batts offer trustworthy performance with a touch of practicality. Pick the size that fits your project and enjoy dependable insulation that stands up to heat, moisture, and the occasional dust bunny.