When you inspect the exterior brickwork of a chimney, there are a few different issues a chimney technician should look for. Here are issues regarding chimney brickwork.
1) Cracked brick
2) Spalling brick
3) Deteriorating mortar joints
4) Loose brick
5) Molding brick or mortar joints
Water is the biggest enemy of a chimney. Water will deteriorate mortar joints and mold feeds and forms in wet damp places. Bricks and mortar are porous materials and will soak water during rainstorms. If a chimney is in good or bad condition, it is best to recommend chimney waterproofing to prevent water saturation.