Where Your Roof Water Ends Up

Usually yes. Everything that lands on your roof leaves through a few feet of gutter and one or two downspouts, and if it is put down at the wall it comes back into the house at the bottom. Two measurements settle most of it: the fall along the gutter, and how far from the foundation the downspout actually discharges.

Already know you need someone out? Call (315) 640-3590, answered 24/7.

Two numbers you can check with a level and a tape

Start here, because both are cheap to verify and one of them is the answer more often than anything on the roof. The Department of Energy directs that gutters be installed along the eaves sloping at least 1/16 inch per foot of run to give positive drainage toward the downspouts, and that downspouts terminate at least 5 feet from the foundation, or discharge to an underground catchment at least 10 feet away that is not connected to the foundation drain system. A sixteenth of an inch per foot is about an inch of fall over sixteen feet, which you can check with a level held along the front lip. The same guidance notes that channels come in 4, 5 and 6 inch sizes and that the style, K or half round, is a matter of looks rather than performance.

How much water is actually moving through those few feet

It is worth knowing the load before deciding whether a gutter is undersized or simply hung wrong. The NOAA 1991 to 2020 normals for Hancock International put annual precipitation at 38.47 inches, with 173.6 days a year recording at least a hundredth of an inch, 89.7 days at least a tenth, 22.7 days at least half an inch and 5.3 days an inch or more, plus an annual snowfall normal of 123.8 inches. Every bit of that has to leave the roof through the gutters and past the joints. A system that copes perfectly with the 173 small days can still be overwhelmed on the five big ones, and those are the days homeowners actually notice. So the question is not whether the gutters work. It is whether they work on an inch of rain in a day.

Overflow in one fixed spot is a fall problem, not a leaf problem

If the water spills at the same point every heavy rain, cleaning it out will buy a few weeks and not more. A gutter that is level or running backwards holds standing water along its length, and the low point becomes the outlet whether or not there is a downspout there. Look for the tells: a sagging line seen from across the street, a stain running down the fascia below one spot, moss or grit collected at one end, or a hanger pulling out. The Department of Energy's minimum of 1/16 inch per foot toward the downspout is what puts the low point where the outlet is. Re-hanging a run to that fall is modest work, and it is very often the whole repair on a house that has been having its gutters cleaned for years.

The downspout at the wall is the wet basement

This is the connection people almost never make, because the symptom is two floors below the cause. A downspout that ends in a splash block at the wall is putting hundreds of gallons a year straight down the outside of the foundation, which is exactly where you do not want it. The Department of Energy's requirement is at least 5 feet from the foundation at grade, or at least 10 feet to an underground catchment, and it adds a condition worth repeating: that catchment must not be connected to the foundation drain system. A leader tied into the footing drain is feeding the very thing that is supposed to be keeping the basement dry. The fix at grade is usually a length of extension pipe and an afternoon, which is why this section exists before the one about hiring anybody.

The federal guidance on gutters in a cold climate is not what you expect

There is one recommendation here that cuts against the local default, and it is worth knowing before you buy a fourth set of gutters for the same stretch of roof. The Department of Energy states that in cold climates gutters will freeze and should be avoided, and that grade-level drainage should be installed instead: a rock bed around the house over a lined trench with a drain pipe carrying water to a finished grade at least 5 feet from the foundation, a dry well or another approved location, with the house protected from splashback. That is a per-job choice, not a rule for the whole county, and most houses here keep their gutters for good reasons. But on a short, awkward or repeatedly ice-bound run, a grade-level bed is an accepted alternative rather than a compromise.

Ice on the path, and what it is telling you about the attic

Ice at ground level under one spot is a drainage signal first: water is being delivered to the same few square feet of walkway all winter, and the NOAA hourly normals put the temperature at or below 32F for 2,220 hours a year here, a quarter of the year, so it does not get a chance to soak away. Move the discharge point and the path clears. Ice building up on the roof edge itself is a different signal and it points inward rather than outward, because what melts snow on a cold day is heat escaping from the house into the attic. That is the ventilation and air sealing side of the work, and it is covered in the attic ventilation guide on this site. Adding gutter capacity does not address it, and neither does a new covering.

A flat roof needs two ways out, not one

Where a porch, garage or addition roof is low-slope and has a raised edge or a parapet, drainage stops being about gutters and starts being about outlets. Section R903.4 of the 2025 Residential Code of New York State requires that unless roofs are sloped to drain over their edges, roof drains be installed at each low point, and R903.4.1 requires secondary emergency overflow drains or scuppers where the perimeter construction would trap water if the primary drains blocked, with the overflow inlet set 2 inches above the low point. The reason is weight. A blocked outlet on an enclosed roof turns it into a tank, and the failure mode there is structural rather than merely wet. If your low-slope roof has one outlet and no second one, that is the first thing on the list.

Where a roof runs into a wall, the water has to be turned out

One small piece of metal decides whether a roof-to-wall junction sends its water into the gutter or into the wall. The Department of Energy's flashing guidance directs that step and kick-out flashing be installed at all roof-wall intersections, that step pieces be lapped shingle fashion and integrated with the wall drainage plane above, that siding end at least one inch above the roof surface, and that the kick-out at the lower end be large enough for the flow it will see. It also warns that site-made diverters are often undersized or have unsealed seams. Look at the bottom of any run where a roof meets a wall: if there is no turned-out piece of metal there, the water from that whole roof plane is being delivered into the corner of the siding.

A re-sided house will not show you this from outside

The reason to look now rather than wait for evidence is that on a modernized house the evidence stays hidden. The Department of Energy states that where sidewall flashing is missing or inadequate, water leaks into the wall and damages sheathing, framing and insulation and grows mold in the cavities, and that while older wood siding showed the problem as peeling paint, newer claddings such as fiber cement, vinyl and brick veneer can mask it for years. Add the Environmental Protection Agency's timing, that items dried within 24 to 48 hours will in most cases not become moldy, and a junction that wets a wall cavity every heavy rain is never drying inside its window. What you can see from the driveway is whether the siding is sitting hard down on the shingles, and that one is worth acting on.

Narrow lots, shared walls, and where the water goes next

In parts of this county the water leaving your roof lands somewhere that is not really yours, and that changes what a sensible repair looks like. Solvay village is the most densely built place on this site: 3,292 units at a median build year of 1947, 91.4 percent of them built before 1980, and only 48.1 percent single-family detached. The Town of Geddes around it is 85.1 percent pre-1980 with almost nothing built after. Narrow lots and shared walls mean short eave runs, downspouts with nowhere to go five feet out, and roofs draining onto a neighbor's ground. On that kind of house the answer is usually a buried line to a sensible discharge point rather than more gutter. Where a splash block and an extension would fix it, we will tell you that and you can do it yourself in an afternoon.