Damaged mortar or brick can become saturated with moisture from your home's exterior or interior. During cold seasons, this water can freeze and expand, causing cracks in the brick. Over many winters, this process can cause the brick face to fall off. Brick that has begun to crumble in this way is referred to as "spalled." Unfortunately, spalled brick is impossible to repair without replacing. Once a brick has begun to fall apart it cannot be put back together.