Knauf insulation EcoBatt® insulation are thermal and acoustical products made from highly resilient, inorganic glass fibers bonded by a thermosetting resin. The products are available unfaced and high density (HD) batts are available where optimal thermal performance is required and space for insulation is limited. High-density cathedral ceiling batts, for example, deliver greater R-value in less space, so builders can increase R-values and still maintain adequate space for ventilation.