It is important that chimney repair professionals who notice any cracks in a masonry chimney allow them to dry out before taking steps to repair the structure.
The DIY Home Advice blog states that it is important that any cracks or other damage is identified and corrected as soon as possible, however, it is imperative there is no moisture when the repairs are made.
Once the affected area has been allowed to dry, the next step is to apply a bonding material or a caulk using a flat tool, the source adds.
Should chimney repairmen notice that the mortar surrounding the stone is beginning to chip and crumble, they should use a chisel to break it up in squares and then replace it with another.
Micro fractures are a common occurrence in masonry chimneys and
it is important workmen keep an eye open for them, Howard Rowell,
from the Royal Chimney Service in Milwaukee, told the Milwaukee
Journal Sentinel recently.