Johns Manville CladStone™ Water & Fire Block insulation is manufactured from inorganic fibers derived from volcanic rock. Advanced manufacturing technology ensures consistent product quality, with high-fiber density and low shot content for excellent performance. Noncombustible, with water-repellent properties, it is ideal for wall cavity and rainscreen applications.
Water-Repellent: Repels water to ensure drainage when applied as part of a proper exterior wall cavity system.
Fire-Resistant: Melting point in excess of 2000˚F (1093˚C). Flame Spread of 0 and Smoke Developed of 0.
Durable Inorganic Glass: No growth of fungi. No sustaining of vermin.
|ASTM Standards||ASTM C665||Type I|
|Thermal Resistance||ASTM C518||R-4.3 per inch|
|Flame Spread||ASTM E84||0|
|Smoke Development||ASTM E84||0|
|Water Vapor Permeance Facing||ASTM E96||Unfaced, 50 perms as tested|
|Water Vapor Sorption||ASTM C1104||Absorbs 0.03% by volume|
|Odor Emission||ASTM C1304||Pass|
|Fungi Resistance||ASTM C1338||Pass|
|Combustion Characteristics||ASTM E136||Pass|
|ASTM C612||Type IA, IB, II, III, IVA|
|ASTM C356||Linear shrinkage < 2% 1200° F (650° C)|
|ASTM C1335||Shot content less than 25%|
JM CladStone Water & Fire Block Data Sheet
JM CladStone Water & Fire Block Installation Instructions
Specifications and Certificates
Mineral Wool Limited Warranty
Continuous Insulation for Rain-Screen Cladding Systems - Metal Panel
Continuous Insulation for Rain-Screen Cladding Systems - Fiber Cement Panel
Continuous Insulation for Cavity Wall Systems