Ask the team at Mason Chimney Repair what makes a fireplace feel timeless and they will rarely start with the flame. They start with the architecture around it: the proportions of the opening, the material of the surround, and the way the chimney breast carries the eye up to the ceiling. Those details decide whether a fireplace reads as the heart of a room or as an appliance set into a wall.

Classic fireplaces have survived centuries of changing taste because their design language is consistent. Once you learn to read it, …