Description MBI roof insulation glass wool blanket is lightweight thermal and acoustical fiber glass insulation made of resilient,Website:://.unitedglasswool.com, flexible glass fibers. United Insulation glass wool blanket designed for use between metal studs or some suspended ceilings. United Insulation Un-Faced glass wool blanket and FSK Faced glass wool rolls are effective when controlling heat flow to the exterior, unwanted noise in internal walls. This easy-to-install product is available in full lengths and in a wide range of R-factors.AVAILABLE FORMS Un-faced or Plain – Un-faced blanket are designed for thermal and acoustical insulation applications Faced with Foil-Scrim-Blanket (FSK) - Faced blanket can be used where vapor barrier is needed. Either single sided or double sided is available. Advantage - Lifelong energy savings - Lightweight