The gutter catches the water. The downspout decides where it ends up, and that is the part most systems get wrong. A downspout that dumps at the corner of the house is delivering the entire roof's runoff to the exact spot where it does the most damage: against the foundation, into the backfill, and toward the basement.
We install and replace downspouts as engineered drainage, not as an afterthought. That means outlets sized to the water volume the roof produces, downspouts placed where the runoff concentrates instead of where the last installer found it convenient, and extensions that carry discharge far enough from the wall that the soil sheds it away from the building.
We handle downspout work on homes and commercial buildings across all four states, on new gutter systems and as upgrades to existing ones that overflow every storm. It is often the cheapest fix on the whole drainage path, and the one that protects the most expensive part of the house.
Sizing and Placement Decide Everything
An undersized or badly placed downspout makes a good gutter overflow in every hard rain, and the fix is rarely a bigger trough. Standard sizing runs 2x3 for small rooflines, 3x4 for most homes, and oversized profiles for commercial volume. Placement matters as much: outlets belong where the roof concentrates water, and long runs need more than one. Adding a downspout to a run that overflows is one of the cheapest drainage fixes there is.
Extensions That Actually Move Water
Discharge at the foundation is barely better than no downspout at all. Extensions of 4 to 6 feet are the working minimum to get water past the backfill zone, and we install flip-up extensions where mowing matters and buried extensions where the grade allows. In our climate this is also a winter issue: water dumped at the wall freezes into ice sheets on walks and refreezes in the backfill through every spring melt cycle.
Materials and Fit
We install aluminum downspouts that match your gutter system in profile and color, from our 20+ color options. Everything mounts with heavy-duty brackets and fastening that stands up to wind and to the snow and ice that slide off a roof onto whatever is below.
- 2x3, 3x4, and oversized commercial profiles
- Corrugated, smooth, and box styles to fit the building
- Color-matched to the gutter run
- Flip-up, splash block, and buried extension options
- Wind- and ice-rated mounting
Downspouts and Clogs
Downspouts are where most clogs live, because the flow path narrows and turns at the outlet and elbows. If your downspouts plug every fall, the fix is upstream: Alu-Rex guard protection keeps debris out of the trough so nothing washes into the outlet to bridge and pack. We install it as the only Alu-Rex Certified Installer in your region, backed by a lifetime clog-free guarantee.
What You Get
- Sized to the roof area, not a default
- Placed where the water concentrates
- Extensions carry discharge clear of the foundation
- Color-matched to the gutter system
- Ice- and wind-rated mounting
- Works as a standalone upgrade to existing gutters
How the Job Runs
- 01 Map the drainage
We look at where the roof concentrates water, where the grade sends it after discharge, and where the current outlets fall short.
- 02 Size and place
Outlets and downspouts specced to the volume, positioned for drainage, with added downspouts where a run overflows.
- 03 Install and extend
Downspouts mounted with heavy-duty brackets, extensions fitted so discharge lands clear of the backfill zone.
- 04 Test
Water through the system to confirm every outlet carries and every extension discharges where it should.
Common Questions
01 How far should downspouts extend from the house?
Four to six feet is the working minimum to clear the backfill zone next to the foundation, where soil is loosest and water heads straight down the wall. Where grade or landscaping allows, buried extensions can carry it farther.
02 Can you add downspouts to my existing gutters?
Yes, and it is one of the most cost-effective drainage fixes we do. A run that overflows in heavy rain usually is not undersized in the trough, it is underserved at the outlets. We cut in a new outlet, hang the downspout, and the overflow stops.
03 How do I know my downspouts are undersized?
Watch a hard rain. Water sheeting over the gutter edge while the downspout runs full means the outlet cannot keep up. Overflow concentrated mid-run on a long eave means the run needs another outlet. Both are downspout problems, not gutter problems.
04 Do you handle commercial downspouts?
Yes. Commercial roofs produce volumes that residential profiles cannot move, so we spec oversized downspouts and outlets from the roof's drainage area, and we route discharge so it stays off walkways and out of parking lots.
05 Why do my downspouts clog every year?
Debris from the trough washes to the outlet, bridges it, and packs the elbow below. Clearing it restores flow until the next leaf drop. Keeping debris out of the trough with Alu-Rex guards removes the cause, and our guarded systems carry a lifetime clog-free guarantee.
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