The repair process, which replaces damaged mortar joints between bricks is commonly known as tuckpointing. The procedure involves removing any decaying mortar and re-placing it to reseal the joints. Bricks can last up to 100 years, however the mortar between them may need restoration after 20-25 years. What causes mortar deterioration? There are many factors that cause mortar damage. Some of them may be a result of over-painting of brick facades with oil paints. However most damage is caused by weather conditions and external pollution.