Laminated plasterboard, formed by a 100% natural, very high-density plaster core with waterproofed lining on both faces, with a speciall cellulose laminate. The fiberglass built-in to the core increases the level of fire protection. The waterproofing treatment decreases the water absoption capacity, thus reinforcing its resistance to direct effects of water and dampness. Its special formula and high density provide it with greater impact resistance and better acoustic insulation against airborne noise.