Chimney & Tuckpointing
Chimney Repair & Tuckpointing
Stop freeze-thaw mortar failure before it spalls the brick.
Crumbling mortar joints, a leaning chimney, or a failing crown let water into your Lexington home. Lexington Masonry Pros repoints, rebuilds, and waterproofs chimneys and brick walls across Fayette County.
What is tuckpointing?
Tuckpointing grinds out deteriorated mortar joints and packs in fresh mortar, restoring the wall’s strength and sealing out water before freeze-thaw cycles spall the brick.
- Tuckpointing & repointing
- Chimney crown, cap, flashing, and damper repair
- Partial and full chimney rebuilds
- Masonry waterproofing
Related: the 3-2-10 chimney height rule · chimney repair cost guide · can a handyman repair a chimney? · chimney sweep vs. chimney repair · why chimneys smell bad · chimney draft problems Back to Lexington Masonry Pros or see brick & block.
Lexington Masonry Pros · Serving Lexington & Fayette County, KY · Call or text (859) 310-1209
What tuckpointing actually fixes
Tuckpointing replaces failed mortar joints. It restores the wall’s weather resistance; it does not fix brick that has already spalled.
Mortar is designed to be the sacrificial element — softer than the brick, so it takes the movement and the weathering and can be replaced. When joints recede, crack or crumble, water starts reaching places it should not, and on a chimney that means the flue and the framing around it.
The order of work matters. Repointing a chimney whose crown is cracked, or whose flashing has failed, simply directs the water elsewhere for a season.
Why mortar type matters on older Lexington brick
Historic soft brick needs a lime-based mortar. Hard modern Portland mortar is stronger than the brick and destroys it over time.
This is the single most consequential decision on an older Bluegrass house, and it is regularly got wrong. Nineteenth-century brick is comparatively soft. Bed it in a hard, high-Portland mortar and the mortar stops yielding — so seasonal movement and freezing water are taken up by the brick face instead, which spalls and crumbles.
The National Park Service documents the accepted practice for repointing historic masonry in detail, and it is the standard we work to on older buildings. The mortar should always be the weaker of the two materials.
Sweep or inspection flag your chimney liner as cracked or missing? See our chimney liner replacement cost guide before heating season starts.
Common questions
How do I know if my joints need repointing?
Run a key or screwdriver along a joint. If mortar crumbles out easily, is recessed more than roughly a quarter inch, or you can see daylight or gaps, it needs attention.
Can you repoint just one section?
Yes, and often that is the right call — repointing sound joints is wasted money and disturbs a wall unnecessarily. Chimneys and parapets usually need more attention than sheltered walls.
Why is my chimney leaking when the roof is fine?
Most often the crown, the flashing where the chimney meets the roof, or open mortar joints — not the roof covering. Those three are the first things to check.
Not sure how often yours needs a look? See our chimney inspection frequency guide.
Lexington-Fayette Urban County Government publishes local government services and contact information for the area.
Related: chimney cap replacement — cost, materials, and cap vs. crown. · chimney flashing repair — when the leak is at the roofline, not the chimney itself. · chimney tuckpointing cost — what drives the price. · signs your chimney needs repair — the full warning-sign checklist. · best time of year for chimney repair — why fall beats winter. · chimney repair or rebuild — how to know which one you need.
Last updated: August 24, 2026
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