Up To Date 15+ Fireplace Mantel Extension
Up To Date 15+ Fireplace Mantel Extension. Today, mantels act as extensions of the overall fireplace architecture, a way to implement both household style and simple convenience. Place the new mantel on the existing mantel (image 1), add shims (image 2) and secure it with a finish nailer. Trim the top shims with a jigsaw (image 3). The fireplace mantel or mantelpiece, also known as a chimneypiece, originated in medieval times as a hood that projected over a fire grate to catch the smoke.