NI WW 60 – Window Wall 60 presents a semi-rigid stone wool insulation board, available in a 6pcf density formulated for exterior cavity wall and rainscreen applications.

Compatible with a wide array of cladding attachment systems, NI WW 60 offers durability alongside its non-combustible features. This ensures that the insulation remains resilient, resisting toxic smoke development and flame spread even under direct fire exposure. Beyond fire safety, NI WW 60 delivers energy efficiency with dependable thermal performance, enhanced acoustic comfort, and moisture resistance, ensuring sustained insulation value over time.

NI WW 60 Insulation is an inorganic mineral fiber insulation produced from basalt volcanic rock. Board is non-combustible, nondeteriorating, moisture resistant, dimensionally stable, noncorrosive, and non-mildew supporting. It has a high fiber with a low non-fibrous content and a very low organic binder. It maintains a consistent density throughout it’s designed life cycle.

NI WW 60 Insulation is packaged in a poly film shrink wrap.

NI WW 60 Insulation can also be used in fire-rated wall assemblies although the exact assembly may require further testing to comply with building codes. The use of such a wall does preclude the need for active fire suppression systems. A sheet or film vapor retarder, adhered to one face of the boards, may be needed for exterior wall applications, and should be specified by the architect or engineer for the building project. For acoustical applications requiring a particular STC rating, further testing of the exact wall assembly may be required since product thickness and dry wall thickness and stud spacing, can affect test results.