Tuckpointing for chimneys in Dolphin Isles
A water repellent is discussed only after the joints are sound and have had time to settle.
- Owned and run locally
- Available for same-day service
- Fully licensed and insured
- Family owned and run
Clues that the chimney mortar is failing
- Mortar pieces on the roof around the stack
- Stepped cracks following the mortar lines
- Loose brick where joints have washed out
- Caulk pushed into open joints
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What good tuckpointing looks like
Testing chimney joints by light scraping
Looking at a joint tells part of the story. Brick industry guidance adds a simple test, which is scraping the mortar lightly with a metal tool. Sound mortar resists. Weak mortar powders or comes away in grains.
We scrape suspect joints across each face rather than judging by color alone. Some joints look fine and are soft underneath, while others look worn and are still firm. The test lets us draw the repointing boundary around mortar that has actually failed, not around joints that only look old.
Why repointing mortar is mixed drier
Mortar for laying brick is wetter than mortar for repointing. Federal preservation guidance explains that a drier mix is cleaner to work, packs tightly into the joint and cures with fewer shrinkage cracks. Brick industry guidance describes a similar consistency.
A wet mix smears across the brick faces and slumps in the joint. We aim for mortar stiff enough to press firmly into place. If you watch the work, it looks slower than bricklaying, and that is intended. Packing a stiff mix well is what makes the joint dense.
Curing care for freshly repointed joints
Fresh mortar that dries too quickly can chalk, bond poorly and weather early. Federal preservation guidance describes misting new joints lightly after tooling. It also suggests covering the work to keep it damp and out of direct sun, especially where mortar is lime-rich.
We plan curing care as part of the job, not as an afterthought. That may mean return misting, covers left in place or both. We explain what we will do and what you should leave alone, such as moving covers or hosing the chimney, while the new joints cure.
Repointing out of direct sun on hot days
Mortar needs time to cure with water in it. Federal preservation guidance recommends doing repointing work in the shade where possible, because strong sunlight on a hot wall pulls water out of fresh joints before they bond.
We plan the work so the face being repointed is in shade where possible, and we cover it when it is not. That can mean starting on a different face in the morning and another in the afternoon. We explain the plan so the sequence makes sense to you.
Mortar joint checks for homes in Dolphin Isles
- Removal of mortar slivers on brick edges
- Access plan for the stack above the roof
- Cover over any opening left at the top
- Cleanup and haul-away of old mortar
Chimney mortar questions we hear
Can you repoint only the worst joints on the chimney?
Sometimes. Where damage is confined, spot repointing can be sensible. Brick industry guidance also suggests repointing every joint in an affected area, because it is hard to tell which joints admit water. We explain the boundary we recommend.
How long does new mortar take to cure?
Mortar hardens gradually and keeps gaining strength after it looks set. We keep new joints damp and shaded as needed and tell you what to avoid while it cures, such as washing the brick or using cleaners on it.
Will you repoint the joints inside my firebox as well?
Firebox joints use refractory mortar and belong to firebox repair, a separate service. Chimney tuckpointing covers the exterior masonry. If both need work, each is priced on its own line so you can decide.
More Ways to Care for Your Fireplace
- Gas Fireplace Repair and ServiceGet a model-specific gas fireplace service plan for the fault you are seeing or the maintenance your unit needs.
- Chimney Flashing RepairRepair the chimney-to-roof connection with a scope that accounts for the adjoining roofing and masonry.
- Chimney Crown RepairRepair the damaged chimney top with an approach matched to the crown and supporting masonry.
- Wood-Burning Fireplace Insert InstallationFit a wood-burning insert after assessing its host fireplace and full connection requirements.
- Chimney Chase Cover ReplacementReplace the chase top with a properly planned cover and clearly defined pipe connections.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo