DS EN 15101-1:2013 Thermal Insulation Products For Buildings - In-Situ Formed Loose Fill Cellulose (Lfci) Products - Part 1: Specification For The Products Before Installation Defines requirements for loose-fill cellulose insulation (LFCI) products for the thermal and/or sound insulation of buildings when installed into walls, floors, galleries, roofs and ceilings.