Architectural Window Trim & Surrounds

Why Precast Window Trim?

Window trim and surrounds are among the most visible elements on a building facade. Precast concrete surrounds — unlike EIFS or synthetic trim — are permanent, dimensionally stable, and maintenance-free. They provide genuine material depth and shadow lines that read as authentic architectural detail rather than applied decoration.

Common Trim Elements

A complete window treatment may include several precast elements working together to create a composed architectural unit.

• —Sills — sloped bottom member that sheds water; standard or decorative profiles
• —Keystones — wedge-shaped accent at the crown of an arch or flat lintel
• —Surrounds — full frame around the window opening: head, jambs, and sill
• —Pilasters — flat vertical elements flanking the window, creating a column-like frame
• —Hoods & Pediments — decorative crowns over windows; triangular, broken, or scrolled
• —Banding — horizontal trim bands at windowsill height tying the facade together

Integration With Facade Systems

Precast window trim can be specified for new construction, facade renovation, or addition projects. For renovation work, we can match existing trim profiles by taking field measurements or casting from a sample piece. Our shop drawings show dimensional coordination with window rough openings, weather barrier, and flashing.

Lions Precast Approach

Window trim is typically a high-quantity, repetitive element — dozens or hundreds of identical sills, keystones, or surrounds. Our in-house mold shop allows us to produce a consistent run at scale. All pieces are numbered and palletized by installation sequence for efficient jobsite handling.