Most Gutters Are Replaced. Yours Should Be Sized.

Five Inches Is A Default, Not An Answer

Almost every house on the northwest side wears five inch K-style aluminum, and for a lot of them that is genuinely the right trough. It is the default because it fits standard fascia, it is what the supply house stocks, and on a modest roof with a couple of downspouts it never gets tested hard enough to argue with.

Then there are the ones where it was never enough. A long unbroken eave on a steep roof funnels a lot of water into one trough, and the steeper the pitch the faster it arrives. Add a valley dumping onto that run and you have a section of gutter being asked to carry more water per minute than its cross-section can move. It does not fail politely. It sheets over the front lip during the worst ten minutes of the storm, which is exactly when you are looking out the window at it.

Six inch troughs move meaningfully more water than five, and on the right house the upgrade costs less than people expect because the labor is the same. The honest part is that plenty of houses do not need it. We would rather tell you the five inch is fine and size the downspouts properly than sell you a bigger trough that solves nothing.

What Actually Decides The Size

Roof area feeding the run, the pitch, whether a valley concentrates into it, and the length before water can reach an outlet. Those four things, measured, settle it. A shallow roof over a small footprint sheds slowly and forgivingly. A steep gable over a wide footprint with one downspout at the far end is a different problem wearing the same trough.

Downspouts Are Half The System And Get A Quarter Of The Thought

A trough is a holding pattern. The water leaves through the downspouts, and a run with too few outlets backs up long before its capacity is reached. Adding one outlet is usually cheaper than upsizing eighty feet of gutter, and on a lot of houses it is the whole fix. We count outlets against run length before we quote a bigger trough.

Where The Water Goes After That Is The Part That Costs Real Money

This is the one homeowners are most surprised by. A downspout that dumps at the base of the wall is putting a roof’s worth of water into the soil against your foundation, over and over, every storm. Around here that soil is clay, and clay holds it. The basement gets damp, the sump runs constantly, and the homeowner blames the basement.

Extensions, buried leaders, splash blocks that actually throw water past the backfill zone. It is unglamorous and it is frequently the difference between a dry basement and a recurring one. If you have a wet corner downstairs, go outside during the next real rain and look at what the nearest downspout is doing. It is often that obvious.

Seamless Against Sectional

Seamless is what we run, formed on site to the length of your eave, so the only joints are at corners and outlets. Sectional gutter has a joint every ten feet, and every joint is a place that eventually weeps. On a short straight run the difference is minor. On a long one it matters, and it is the reason a section of old gutter is usually stained underneath in the same places.

Guards, Honestly

Guards help on a house under mature trees, which describes a lot of this village. They keep the trough from packing with leaves and they cut how often anybody has to be on a ladder. They are not maintenance-free, no matter what the brochure says. Fine debris still gets through most designs, shingle grit accumulates, and a guard that clogs on top sheds water straight over the edge while the trough underneath stays dry and clean.

What guards do not do is make an undersized gutter adequate. If your gutter overflows in a downpour with nothing in it, a guard changes nothing about that. We will tell you when guards are worth it on your house and when the money belongs in capacity instead.

Ice Dams And What Gutters Have To Do With Them

Gutters do not cause ice dams. That is worth saying plainly because a lot of people are told otherwise. An ice dam forms when heat escaping into the attic melts snow on the upper roof, the meltwater runs down to the cold eave and refreezes there. The gutter is simply where you notice it, because that is where the ice piles up and the icicles hang.

What gutters can do is make it worse once it has started, by holding a mass of ice at the eave. But pulling the gutters off would not solve anything, and the fix is upstream: air sealing and insulation in the attic, and ventilation that keeps the roof deck cold. If you get dams every winter, we will look at the roof and the attic rather than sell you gutters and let you find out in January.