The JM CladStone Water & Fire Block Insulation from Johns Manville is a noncombustible mineral-wool product that offers continuous insulation and moisture management for cavity wall and rainscreen applications. According to the company, JM CladStone facilitates water drainage while providing thermal efficiency, fire resistance, and acoustical performance. The basalt-based insulation also repels moisture and is mildew- and corrosion-proof, says the company. It can be installed with a variety of exterior claddings and fasteners. Pricing is determined on a per-project basis.