This Environmental Product Declaration covers the precast concrete masonry units (concrete blocks and shuttering blocks) product ranges manufactured by LEIER ROM S.R.L. within its designated production plants. The Leier concrete masonry line is defined by a high-density, vibro-pressed concrete structure. As the concrete mix, manufacturing methodology, and essential raw materials are similar across the production plants—the environmental impact results are presented for 1 ton (1,000 kg) of finished product. Additionally, the Annex to this EPD presents the specific GWP (Global Warming Potential) values obtained individually for each of the manufacturing plants. Product type Reference standard Concrete masonry units EN 771-3:2011+A1:2015 Shuttering blocks EN 15435:2008 Construction and Materials Leier concrete masonry units are engineered using specialized, optimized concrete recipes to establish a highly reliable, cost-efficient, and structurally stable configuration: - Vibro-pressed concrete core: formulated from high-quality cement, water, and strictly graded aggregates, processed through advanced industrial vibro-pressing technology to ensure high structural stability, superior compressive strength, and low dimensional variation. - Optimized hollow layout: designed with a specialized inner-rib geometry, vertical hollow structures, and an tongue-and-groove interlocking layout. This layout provides reduced self-weight, exceptional structural bonding and a top-sealed layout that prevents unnecessary mortar vertical flow during installation. Manufacturing and Sustainability The production process takes place across Leier's indicated concrete manufacturing plants in Romania, operating under standardized industrial protocols. The manufacturing process relies on natural raw materials, establishing a clean, mineral-based profile. The highly automated vibro-pressing setup ensures consistent dimensional execution, minimizing waste and energy demand per tonne of finished product. Product Benefits Structural Durability & High Load Capacity: the dense, vibro-pressed concrete mix delivers excellent mechanical resistance, rendering these masonry units perfect for walls, basements, agricultural facilities, industrial warehouses, garages and residential layouts. Speed of Execution & Material Efficiency: the precise dimensional uniformity (Class D3) paired with the integrated tongue-and-groove alignment system enables rapid, straightforward installation. This configuration reduces overall construction times, ensures flawless wall leveling, and significantly cuts down on structural mortar consumption. Fire Safety & Thermal Inertia: holding Class A1 reaction to fire rating, the mineral layout provides reliable fire protection and containment properties. Furthermore, its density guarantees beneficial thermal mass effects, aiding in temperature regulation within internal compartments. Secure Delivery: finished precast concrete masonry units are delivered securely on organized wooden pallets, optimized for transport efficiency, forklift mechanical handling and safe, rapid loading/unloading sequences directly onto the construction site layout.