This document provides definitions and descriptions of various construction materials and building components. It includes brief explanations of air barrier paper, attic ventilation types, backhoes, batter boards, brick bonds and sizes, bulldozers, cladding materials, code requirements, concrete joints, concrete masonry units, decorative CMUs, doors, electrical components, framing elements, front end loaders, gypsum board, heat pumps, insulation types, lintels, mortar joints, oriented strand board, plumbing components, plywood, radiant barriers, rebar, roof drainage steps, steep roof materials and shapes, stone types, vapor retarders, water proofing, weep holes, welded wire fabric, and window