A Leaking Marcellus Chimney Is Usually the Roofline
Most chimney leaks start where the stack meets the roof rather than in the brick, and that changes who should be looking at it.
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Three places a chimney leak comes from
Work from the top down. The crown, where a cracked wash lets water into the middle of the stack. The brick and the joints, where an open joint on the weather face lets water in directly. And the roofline, where flashing and counterflashing have to keep water out of the junction between two things that move differently. The third is the commonest and the cheapest to put right, and it is the one most often left out of a quote that is only about masonry. Ask which of the three is being priced before you compare numbers.
Flashing at the roof intersection is required
The code requires approved corrosion resistant flashing, applied shingle fashion to prevent water entering the wall cavity or reaching the structural framing, at the intersection of chimneys or other masonry construction with frame or stucco walls, at wall and roof intersections and at built-in gutters.
123.8 inches a year, most of it in three months
A normal year brings 123.8 inches of snow, 92.0 of them between December and February, with 34.5 days carrying an inch or more and 13.4 days carrying three or more. Snow lying against the uphill side of a stack melts slowly into whatever detail is there rather than running off it.
A village with a 1952 median
Marcellus village has 1,031 units on a median build year of 1952, with 81.5 percent built before 1980 and the town around it at a median of 1963. Flashing details of that age are usually on their second roof and sometimes on their third, which is where the trouble tends to be.
What the code wants where a stack meets a roof
Section R703.8.5 of the Residential Code of New York State requires that flashing be located beneath the first course of masonry above finished ground level above the foundation wall or slab, and at other points of support including structural floors, shelf angles and lintels, where masonry veneers are designed in accordance with Section R703.8. Section R703.4 additionally requires approved corrosion-resistant flashing, applied shingle fashion to prevent water entering the wall cavity or reaching the structural framing, at exterior window and door openings, at the intersection of chimneys or other masonry construction with frame or stucco walls, under and at the ends of masonry, wood or metal copings and sills, at wall and roof intersections and at built-in gutters.
Source: 2020 Residential Code of New York State, Section R703, Exterior Covering, via UpCodes, accessed 2026-09-10
Syracuse's normal annual snowfall is 123.8 inches under the 1991 to 2020 normals, made up of 9.9 inches from September to November, 92.0 inches from December to February and 21.9 inches from March to May. A normal year brings 66.4 days with a tenth of an inch or more of snowfall, 34.5 days with an inch or more, 13.4 days with three inches or more and 1.1 days with ten inches or more.
Source: NOAA National Centers for Environmental Information, 1991-2020 US Climate Normals, station USW00014771 Syracuse Hancock International Airport, accessed 2026-09-10
Baldwinsville village has 3,784 housing units with a median year of construction of 1975, a pre-1940 share of 20.6 percent and 17.3 percent built between 1940 and 1959, so 56.7 percent of the village predates 1980. Marcellus village has 1,031 units, a median of 1952, a pre-1940 share of 38.4 percent and 81.5 percent built before 1980, and the Town of Marcellus around it has 2,789 units, a median of 1963 and a pre-1940 share of 31.8 percent.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, table B25034 Year Structure Built and table B25035 Median Year Structure Built, accessed 2026-09-10
What chimney repair involves
Where a Marcellus chimney leak actually starts
When water shows up around a chimney the brick gets blamed and the roofline is usually responsible. The code requires approved corrosion resistant flashing at the intersection of chimneys or other masonry construction with frame or stucco walls, and at wall and roof intersections, applied shingle fashion to stop water entering the wall cavity or reaching the framing. On a village where the median house dates from 1952, that detail has had seventy winters and 123.8 inches of snow a year to work on it, most of it landing between December and February.
Does it leak in rain, or only in a thaw?
Send the Marcellus address with the answer. That one detail narrows it to the right trade quickly.
Chimney leak questions from Marcellus
There is a stain on the ceiling near the chimney. Is that the brick?
Sometimes, and more often it is the junction. The code requires flashing where a chimney meets the roof and where masonry meets frame or stucco walls, applied shingle fashion to prevent water entering the cavity or reaching the framing, and that detail fails long before brick does. Before paying for masonry, ask for the flashing to be looked at. Where the stain sits, uphill or downhill of the stack, is a useful clue and worth photographing.
We only get the leak when snow melts, not when it rains. Why?
Because melting snow sits and rain runs off. A normal year here brings 123.8 inches of snow with 92 of it between December and February, and snow lying against the uphill side of a stack melts slowly into whatever detail is there. Rain hits the same junction for minutes, while meltwater works at it for days. A leak that only appears during a thaw points at the flashing or a missing cricket rather than at the brick.
Get a Marcellus chimney leak traced properly
A ceiling stain near the stack, a cracked crown, flashing lifting at the roof: describe it with the address, no obligation.