We've all seen it: The brick or stone wall where the mortar is all powdery, cracked or non-existent. "Mortar can disintegrate over time because of weather as a result of the freeze-thaw cycles. The ...

The mortar joints between bricks and stones can become porous with age, allowing rainwater to penetrate to the inside. This can cause damp patches to appear on interior walls and ruin decorations. The ...