A masonry chimney is exposed to the weather on all sides and from above, and it is usually the first part of a house to show its age. Mortar joints erode, the concrete crown at the top cracks, flashing lifts, and brick faces flake off once water gets in and freezes. Most of these begin as small defects that are inexpensive to correct. Left for several seasons they become rebuilds.

  • Tuckpointing — grinding out and replacing failed mortar joints
  • Crown repair or replacement
  • Flashing repaired or replaced at the roofline
  • Spalled and loose brick replaced
  • Water-repellent treatment for sound masonry

What repairs cost

Angi's 2026 data puts the average chimney repair at $455, with most homeowners paying $160 to $750 for common problems such as minor repointing, a small liner repair or a cap or crown replacement. Rebuilding a section of the chimney raises the range to $1,000 to $5,000, and a full replacement can reach $15,000. Height, roof pitch and access for scaffolding affect every one of those figures.

Leaning and separating chimneys

On North Texas clay, a chimney that is tilting or pulling away from the wall is a foundation problem showing itself at the top. Signs include a widening gap between the chimney and the siding or brick, flashing that has torn, and cracks that step along the mortar joints. Filling the gap hides the symptom. The cause has to be assessed by a foundation or structural specialist, and the chimney repaired once the movement is addressed.

The 3-2-10 rule

Building codes set a minimum chimney height so that it drafts properly and embers clear the roof. The rule of thumb is that a chimney must extend at least 3 feet above the point where it passes through the roof, and at least 2 feet higher than any part of the building within 10 feet. A chimney shortened by a past repair, or one beside a later second-story addition, may no longer meet it.

Common chimney repair situations in Fort Worth

  • Crumbling or missing mortar between bricks
  • A cracked crown letting water into the chimney
  • Water stains on the ceiling or wall beside the fireplace
  • Brick faces flaking off
  • A gap opening between the chimney and the house

Chimney Repair FAQs

Does homeowners insurance cover chimney repair?

It depends on the cause. Policies generally cover sudden events such as a lightning strike, a chimney fire, hail or a fallen tree, and generally exclude wear, deterioration and lack of maintenance. Document the damage and the date of any storm, and ask your insurer before repairs begin.

Can a chimney be repaired from the inside?

The flue can. Damaged clay tiles can be resurfaced with a refractory coating applied from within, or the flue can be relined with a stainless steel liner. Exterior masonry, the crown and the flashing are repaired from outside.

This content is reviewed by the Fort Worth TX Chimney Sweep editorial team and informed by licensed-contractor sourcing, manufacturer documentation, and established industry standards for Chimney Services. Read our editorial standards.