Pella 250 Series Vinyl Window Upgrade with Interior Trim We recently upgraded a home with Pella 250 Series vinyl windows, replacing old, inefficient units with fresh, high-performance windows. To complete the transformation, we also installed new interior jambs and casing for a clean, finished look. The Pella 250 Series offers excellent energy efficiency, smooth operation, and a modern design that complements any home. Paired with new interior trim, this installation not only improved performance but also elevated the overall aesthetic—inside and out. A full-frame upgrade that delivers lasting beauty and value!