unmortared

Unmortared refers to a building or structure that does not have mortar between its bricks, stones, or other blocks. In masonry, mortar is a binding agent made from a mixture of cement, sand, and water that holds the individual units of a wall together, providing both structural integrity and appearance.

Unmortared structures are typically seen in historic or traditional architecture, where they may have been built using techniques that do not require the use of mortar. For example, dry-stacked stone or brick walls, where the individual units are placed directly on top of each other without the use of mortar. Unmortared walls may also use a technique called "coursed rubble" where the stones are stacked without mortar, but with a layer of smaller stones or gravel in between to provide drainage and stability.

Unmortared buildings often require specialized maintenance and protection, as the lack of mortar can make them more susceptible to weathering, erosion, and structural damage. Water and air can penetrate the gaps between the individual units, causing dampness, salt damage, and brick decay. As a result, unmortared structures may need more frequent repointing or re-mortaring to maintain their stability and appearance.

In some cases, unmortared buildings have been adopted by contemporary architects, who view them as a way to create a unique aesthetic or to mimic traditional building methods. However, these structures still require careful management and maintenance to prevent structural problems and ensure their longevity.