Home Improvement & Renovation hacks for every budget Send Your D.I.Y. Video Skip to Videos All | Trim | Baseboards | Casings | Crown Moldings | Cabinets | Home Improvement | Renovation Projects | Flooring | Casings, • 2/1/22 Installing Wide Window Casings with Corner Blocks Learn how to install another great architecturally inspired finishing touch – the Corner Block and Rosette when installing CertainTeed vinyl siding