Onondaga County
Valley and Flashing Leak Diagnosis in Fayetteville Village
A leak in a Fayetteville valley reads exactly like a worn-out roof from inside the house and is a completely different job from the outside. The village carries the highest share of single-family attached housing of any place on this site at 13.0 percent, with a further 11.7 percent of its 2,092 units in three and four unit buildings, so roof planes meeting each other and meeting vertical walls are far more common here than in the towns around it.
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Why 13.0 percent attached housing puts leaks at valleys
Fayetteville village has 2,092 housing units of which 13.0 percent are single-family attached, the highest attached share of any place on this site, and 11.7 percent sit in three and four unit buildings, leaving 58.7 percent single-family detached. Owner occupancy is 76.9 percent and the median build year is 1961, with 20.7 percent of units built in 1939 or earlier.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, tables B25034 year structure built, B25035 median year structure built, B25024 units in structure and B25003 tenure, accessed 2026-09-14
In Fayetteville village the median year of construction is 1961. Of 2,092 housing units, 20.7 percent were built in 1939 or earlier, 24.6 percent before 1950, 77.2 percent before 1980 and 22.8 percent in 1980 or later. 58.7 percent are single-family detached and 76.9 percent of occupied units are owner occupied.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, tables B25034 year structure built, B25035 median year structure built, B25024 units in structure and B25003 tenure, accessed 2026-09-14
Section R905.2.8.2 of the 2025 Residential Code of New York State requires valley linings to be installed before the shingles go on, and sets minimum widths by valley type: open valleys lined with metal not less than 24 inches wide, open valleys of two plies of mineral-surfaced roll roofing with an 18 inch bottom layer and a top layer not less than 36 inches, and closed valleys lined with one ply of smooth roll roofing not less than 36 inches wide, or a self-adhering polymer-modified bitumen underlayment in place of the lining.
Source: 2025 Residential Code of New York State, via UpCodes, accessed 2026-09-14
Section R903.2.1 of the 2025 Residential Code of New York State requires flashings at wall and roof intersections, wherever there is a change in roof slope or direction, and around roof openings, and requires a flashing to divert water away from the point where the eave of a sloped roof meets a vertical sidewall. Where the flashing is metal it must be corrosion resistant and not less than 0.019 inch thick, which is No. 26 galvanized sheet.
Source: 2025 Residential Code of New York State, via UpCodes, accessed 2026-09-14
Several places on this site are villages inside towns of a different name, so their Census figures are not interchangeable. Liverpool village sits in the Town of Salina, Solvay village in the Town of Geddes, East Syracuse and DeWitt in the Town of DeWitt, Minoa and Fayetteville and Manlius village in the Town of Manlius, North Syracuse spans Cicero and Clay, Baldwinsville spans Lysander and Van Buren, Camillus village sits in the Town of Camillus, and Marcellus, Skaneateles, Elbridge, Jordan, Tully and Fabius each have a village inside a town of the same name.
Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, tables B25034 year structure built, B25035 median year structure built, B25024 units in structure and B25003 tenure, accessed 2026-09-14
Water coming in where two roofs meet?
Send the village address and which way the valley runs. We will arrange a visit that tells you what re-lining it actually involves.
What a Fayetteville valley is made of underneath
A valley is lined before a single shingle goes on, and that one fact decides every quote you will ever be given for one. New York sets the minimum widths by type: metal not less than 24 inches wide in an open valley, or two plies of mineral-surfaced roll roofing with an 18 inch bottom layer under a top layer of at least 36 inches, or in a closed valley one ply of smooth roll roofing at least 36 inches wide, with a self-adhering polymer-modified bitumen underlayment permitted in place of the lining. Because the lining goes in first, it cannot be replaced without opening the shingles on both sides of it, so a quote that promises to cure a leaking valley without disturbing the covering is describing a surface treatment and you should expect it back. The village fabric is why this comes up here so often. Fayetteville is 13.0 percent single-family attached, the highest anywhere on this site, 11.7 percent of its units sit in three and four unit buildings, only 58.7 percent are single-family detached, and 20.7 percent of the housing was standing before 1940 under a 1961 median. Attached and multi-unit forms put more roof planes into contact with each other and with vertical walls, and the code names every one of those contacts as a place that needs flashing: intersections, changes of slope or direction, openings, and the point where an eave runs into a wall. The village sits inside the Town of Manlius and the two are not the same housing stock, so we say which one a figure came from.
Valley, flashing and roof work we arrange in Fayetteville
Roof and Attic Leak Diagnosis
Find out where the water is actually getting in before anyone prices a covering, including whether it came through the roof at all.
Leak Diagnosis in Fayetteville →Flat and Low-Slope Roofing
Find out whether a nearly flat porch, addition or garage roof leaks because it has the wrong covering on it, and what may lawfully go up there instead.
Low-Slope Roofing in Fayetteville →Flashing, Chimney and Skylight Repair
Rebuild the joint the water is actually using, at a chimney, wall, valley, vent or skylight, without re-covering a roof that is still doing its job.
Flashing Repair in Fayetteville →Gutters, Downspouts and Roof Drainage
Get the water that leaves the roof away from the house properly, instead of over the gutter, behind the fascia or straight down the foundation wall.
Gutters and Drainage in Fayetteville →Attic Ventilation and Air Sealing
Stop indoor air reaching the cold roof deck, and get the vent area and the vent split right, so the attic stops making its own water.
Attic Ventilation in Fayetteville →Tell us where your Fayetteville roof planes meet
The valley, the party wall, the dormer cheek. Name it and we will tell you whether it can be repaired in place or has to be opened up.