Ignoring failing mortar joints leads to water infiltration, which causes progressively more expensive damage. Water enters through cracks, freezes during winter, and expands the gaps. This cycle eventually loosens bricks and can cause partial chimney collapse.Inside your home, water damage spreads to framing, insulation, and finished surfaces. What starts as a $1,500 repointing job becomes a $5,000-15,000 reconstruction project. Springs homeowners also face increased risk of carbon monoxide problems when chimney integrity fails. The structural damage, safety hazards, and repair costs make preventive repointing the smart financial choice.