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URSA GLASSWOOL is a product for application in terms of thermal insulation especially used as an insulation of pitch roof, attic, cold roof, external wall, internal walls, floors, ceilings, internal sound absorbers. Non-combustible, soundproof, vapor permeable, compressed, resistant to molds and fungi, made of elastic fibers - the material effectively wedges between rafters without mechanical application depending on the spacing of the rafters. Insulation properties of glass wool allow to keep heat in room during winter and provide cold during the heat period. URSA GLASSWOOL protects also against unwanted noise, and as a nonflammable material, class A reaction to fire (euroclass) A1 reduces the risk of fire. URSA GLASSWOOL slabs and plates with lambda λd=0,035 W/mK are produced in Dąbrowa Górnicza factory. Product’s description is shown below in Table 1. Table 1. Characteristic of URSA GLASSWOOL rolls produced in Dąbrowa Górnicza Distinguishing features Glass wool mostly produced with products coming from recycling (recovery) contains most important insulation features: durability and dimensional stability, constancy of insulation properties. Additional features: fire resistance (euroclass A1), compression capability, low weight, possibility of transport and storage, ease of use (fig. 1), no resistance to permeating water vapor