I set brick and stone in limestone and Texas clay country for a living, but a bad mortar joint looks the same wherever I run into it. When I get up to New York and walk the row homes packed along Staten Island’s North Shore, in St. George, New Brighton, and down into Tompkinsville, I see the same story on wall after wall: joints gone soft, powdery, and recessed, some deep enough to lose a fingertip in. That is a wall telling you it is overdue for pointing, and here is what that actually means, why these particular homes go through mortar so fast, and what I’d tell you to look for before you call anyone.
What pointing actually is
Pointing is raking out failed mortar from between the bricks and packing fresh mortar back in. The brick can outlast the house by a long shot — well over a century in most cases — but the mortar joint is built to be the sacrificial layer, the part that weathers first so the brick doesn’t have to. On a row home, the joints take the worst of it because they’re catching rain, salt air, and freeze-thaw with nowhere to drain. Repointing and tuckpointing get used almost interchangeably around here, and if you want the actual difference between the two, I laid it out in our repointing versus tuckpointing guide.
Why these row homes chew through mortar so fast
A few things stack up against this housing stock. St. George sits right on the harbor, so the walls are taking coastal salt spray day in and day out — it works into the mortar and, given enough time, starts corroding any steel buried in the wall. Then a New York winter puts every open joint through repeated freeze-thaw: water gets in, freezes, expands, and knocks the mortar loose a little more each cycle. And a lot of this housing went up in the late 1800s and early 1900s, laid with soft, lime-based mortar that was never meant to go a hundred years without attention.
Row homes share party walls, which changes the stakes. Water that gets past a failed joint on one facade doesn’t stay put — it can turn up as damp plaster two rooms over, or in the house next door that shares your wall. On these blocks, pointing isn’t cosmetic upkeep. It’s what keeps water out of a wall that isn’t only yours.
The mortar-matching mistake that wrecks more brick than it saves
This is where I see the most damage done, usually by a crew that meant well. These old row homes were laid with soft, lime-rich mortar. Repoint them with hard modern Portland-cement mortar and the joint ends up stronger than the brick around it. Then when the wall moves, or moisture works its way through, something has to give — and it’s the brick that spalls and crumbles instead of the mortar. You lose the actual masonry to save a joint that was supposed to be the sacrificial part in the first place. On historic brick, whether it’s a row home facade or a chimney tied into one, the mortar needs to match the original in strength, color, and profile. That’s a knowledge job, and it’s why an experienced Staten Island masonry crew that understands historic lime mortars is worth more than a cheaper bid reaching for the strongest bag on the shelf.
How the job actually goes
Done properly, pointing follows a set order:
- Rake or grind out the old mortar to a depth of about two to two and a half times the joint width — usually around 3/4 inch — without nicking the brick edges.
- Brush out the joints and dampen them so the new mortar doesn’t dry too fast and lose its bond.
- Pack fresh mortar in tight layers rather than one thick pass.
- Tool the joint to match the original profile — concave, flush, or struck, whatever the wall was laid with.
If the facade fronts a public sidewalk, that work also has to follow city safety and permitting rules, which you can check through the NYC Department of Buildings before scaffolding or a sidewalk shed goes up.
What it actually costs
Here’s where the numbers land on a typical row home job:
| Item | Typical range |
|---|---|
| Repointing, per square foot | $10 – $25 |
| Full facade, multi-story attached home (incl. scaffolding/sidewalk shed) | $8,000 – $20,000 |
Coastal exposure and historic mortar matching push a job toward the higher end — that access and matching work isn’t cheap, and I won’t pretend otherwise. But stack that against rebuilding a wall that’s already spalled and water-damaged, which runs several times more and takes your original brick with it. Pointing done every few decades is the cheapest insurance a brick home has.
Questions I get asked about pointing row homes
How do I know if my row home needs pointing? Look for mortar you can scrape out with a key, joints recessed more than about a quarter inch, powdery residue collecting at the base of the wall, or damp interior walls with no other obvious cause. If you can work a fingertip into a joint, it’s time.
Can I just repoint one bad section instead of the whole wall? Yes — spot repair is common and sensible when the rest of the facade is sound. The catch is making sure the patch mortar matches the original in strength and color, or it’ll stand out and can trap moisture at its own edges.
Is repointing cheaper than replacing the wall, or should I just replace it? Repointing at $10–$25 a square foot is a fraction of what a rebuild costs once brick has spalled out from water damage. Repair almost always wins if you catch it before the brick itself starts failing — replacement only makes sense once the masonry, not just the mortar, is gone. Row-home work rarely stops at the masonry — once the shell is sound, a Brooklyn millwork shop is usually the next call for the cornice and window trim that came off with it.
Why not just use the strongest, most weatherproof mortar available? Because on old soft brick, mortar that’s harder than the brick forces the brick to absorb all the movement and moisture instead, and it spalls. On historic or heritage masonry, the mortar is supposed to stay the weaker, sacrificial part of the wall — that’s the whole point of the material, not a shortcut.
