There are many reasons why cracks form in chimney crowns in the first place and knowing these reasons is one step toward protecting your chimney crown from needing repairs in the first place. Chimneys are constantly exposed to the elements and damage from snow, rain, sunlight and freeze-thaw damage. Your chimney will likely need to be repaired from time to time, especially the crown at the top of the chimney. Frost is another ravager of masonry, as is heat produced both from the natural usage of a chimney and from sitting in the sun all day. Improper construction is another reason why chimney crowns can crack. If the chimney sits on an inadequate foundation, it can cause cracks along the entire chimney flue. It is very important to maintain the structural integrity of your chimney as it can become a fire hazard if neglected. Any cracks should be repaired as soon as possible to avoid this risk. A professional repair company is always the best choice.
At Brick Stone Masonry we install all of our chimney caps/crown with cement cap. Our cement is mixed with fiber mesh and we add wire mesh to prevent cracks.