Parapet wall repair in NYC usually starts at the top of the wall, not the face. Rain reaches a New York parapet from the street, from the roof and straight down onto its coping, and a loose coping or a lifted strip of flashing lets water in long before the brick below shows anything. We repair parapets across Manhattan, Brooklyn, Queens and the Bronx, working from the coping down.
The Brick Industry Association’s Technical Note 36A uses “coping” for the covering at the very top of a wall and “cap” for a covering partway up, usually where the wall changes thickness. In everyday NYC use the top of a parapet is often called its cap, and both are repaired the same way.
We reset or replace copings and caps in stone, metal, brick and other materials, depending on what the New York building already has, and install through-wall flashing beneath every coping we reset. Technical Note 36A names water getting in through coping joints and anchor holes as the main risk, so a reset coping is judged on how well it sheds water, not on how it looks from the street.
New York owners rarely notice the parapet itself first. They notice a stain on a top-floor ceiling or a piece of stone on the roof, and the cause is traced back up to the wall.
On an older New York building, several of these usually turn up together, because they share one cause. The full range of damage is covered in our guide to common parapet damages.
Usually water entering a New York parapet from above, through coping joints, anchor holes or torn flashing. The coping is reset over new through-wall flashing.
The coping has lost its bed or its anchors, so it is reset or replaced before more water runs down into the wall below.
The top courses of an NYC parapet weather ahead of the rest of the wall, so the open joints there are repointed.
Counterflashing on the roof side is loose or missing, and new counterflashing is lapped over the roofing so water cannot run in behind.
Old steel anchors or flashing are rusting inside the New York wall. The rusting metal is replaced and the split brick rebuilt.
Movement after years of water and rust inside the wall. The parapet is braced or rebuilt, with an engineer deciding which.
Four details, three from the Brick Industry Association’s Technical Note 36A on caps and copings, and one from New York City’s own rule on parapets.
Technical Note 36A asks for a coping that overhangs the wall on both sides, with the inner lip of its drip at least an inch from the face, and a top sloped at least 15 degrees. On an NYC parapet, a flat coping set flush with the brick sends every storm down the face of the wall.
The same note calls for flashing that runs past the face of the wall and is bent down a quarter inch to form a drip, and for every hole made for an anchor to be properly sealed. A New York coping reset without flashing beneath it leaves the joints as the only barrier.
On a flat NYC roof the roofing turns up the back of the parapet, and counterflashing laps down over that upturn so water cannot run in behind it. A coating brushed onto the brick cannot stop water that arrives from above through an open coping joint.
Since 1 January 2024, 1 RCNY §103-15 has required a yearly observation of parapets facing a public street, apart from detached one and two family homes. Where one finds an unsafe condition, the city must be told at once, protection goes up, and the repair must be made within ninety days. The observation itself is covered under parapet wall inspection NYC.
The coping and the flashing under it come first, then the roof side, the joints and any lean. Where the yearly observation is due, we carry it out with an engineer, and we also work from reports others have filed.
Loose or cracked copings and caps are reset or replaced and laid back over new through-wall flashing, and open joints near the top of the New York wall are repointed.
A leaning NYC parapet is braced or rebuilt as the engineer directs, and the roof side is finished with counterflashing so the repair holds from both directions.
Every coping we reset on a New York parapet goes back over through-wall flashing, every leaning parapet is looked at with an engineer, and we carry out the yearly observation the city requires.
No coping we reset on an NYC parapet goes back down without through-wall flashing beneath it.
Whether a leaning New York parapet is braced or rebuilt is decided with an engineer, never by eye.
If bracing will hold a leaning NYC parapet safely, we do not sell a rebuild in its place.
A parapet that leans toward the street is the one repair that cannot wait, because whatever falls lands on a New York sidewalk. Years of water and rusting metal inside the wall are the usual cause, and whether the parapet is braced back to the building or taken down and rebuilt is an engineer’s decision.
We work with an engineer on every leaning parapet we take on. Bracing is the smaller job, and if the engineer is satisfied that bracing will hold a leaning NYC parapet safely, we do not recommend a rebuild in its place.
Parapets in New York City sit on flat-roofed brick buildings of every age, from apartment houses in Manhattan and the Bronx to rowhouses in Sunset Park and the rest of Brooklyn, and apartment blocks in Astoria and across Queens. Wherever one of them faces a street, the city’s yearly rule applies, and so does the work on this page.
North of the city line, New York City’s parapet rule no longer applies, so buildings in Westchester County and Yonkers have their own page, parapet wall restoration Westchester.
Browse our gallery to explore the outstanding projects we’ve successfully completed, highlighting our expertise.
Usually the top of the wall first. Most parapet repair means resetting or replacing the coping, putting flashing beneath it, renewing open joints and finishing the roof side with counterflashing. On a New York parapet that has started to lean, it also means bracing or rebuilding it, decided with an engineer.
Because water gets in from above. The Brick Industry Association names coping joints and holes made for anchors as the main ways water enters, and torn flashing lets it run down inside the wall. In Manhattan, Brooklyn, Queens or the Bronx, parapet waterproofing starts at the coping, not with a coating on the brick.
Position. Technical Note 36A uses coping for the covering at the very top of a wall, and cap for a covering partway up, usually where the wall changes thickness. In everyday NYC use, people often call the top of a parapet its cap, and both are repaired in the same way.
Yes, if the coping is to keep water out. Technical Note 36A calls for parapet flashing that runs past the face of the wall and turns down a quarter inch to form a drip. On a New York parapet, a coping reset without it relies on its joints alone to stop the weather.
Often, if the lean is caught early. A leaning parapet can be braced back to the building, or taken down and rebuilt where bracing will not hold, and the choice is an engineer’s. On an NYC parapet over a sidewalk, the decision is not left until the lean gets worse.
When the masonry itself has failed. If the brick and mortar are sound and only the coping, flashing or a few joints have gone, the parapet is repaired in place. Where an NYC parapet has moved too far to brace, or rusting metal has split much of it, an engineer may call for a rebuild.
The clock starts. Under 1 RCNY §103-15, the person who found it must tell the Department of Buildings at once, the owner must put up public protection such as fencing or netting, and the repair must be made within ninety days. On a New York building, that repair is parapet work.
The city’s parapet rule lists a bricklayer, mason, engineer or architect among those who may perform the yearly observation. In Manhattan, Brooklyn, Queens and the Bronx, we carry out the observation with an engineer and then make the repairs it calls for, or work from a report someone else has filed.
If you want the background first, our guide on what a parapet wall is explains why New York buildings have them and the forms they take.
Cracks, bulges and movement in the wall beneath a parapet are a separate repair, covered under brick repair NYC.
Worn mortar joints across the rest of a New York facade are handled under brick pointing NYC.
Everything else we do in brick and stone across the city is gathered under our brickwork contractor NYC page.
