Seamless Gutters in St. Louis

We document each stage with photos, so the layers you will never see again are still visible to you. Roof life is decided by the components that disappear under the last shingle.

Seamless means the trough is formed on site from a coil in one continuous run, so the only joints are at corners and outlets. That matters because seams are where gutters leak first. There is no version of this where sectional gutter out of a big-box aisle outlasts a run rolled on the truck in your driveway.

Size is the decision most homeowners never get asked about. Five-inch K-style is the residential default and it is genuinely fine on a modest roof with average pitch. Six-inch is not an upsell on a large or steep roof: it moves substantially more water, and it pairs with a three-by-four downspout instead of the standard two-by-three, which is where much of the real capacity gain lives. Steep slopes throw water fast, and a long steep plane draining into five-inch gutter will overshoot it in a hard rain no matter how new that gutter is. When we find clean gutters overflowing, undersizing is usually the reason.

Hangers decide whether the run stays on the house. Old spike-and-ferrule gutters work loose as the fascia ages and the spike backs out a little each freeze-thaw cycle. Hidden hangers screw into solid framing behind the fascia and hold far better. If the fascia board itself has gone soft, and on anything that has been overflowing for years it often has, the board gets replaced first. Hanging new aluminum on rotten wood is a callback waiting to happen.

Pitch is small and unforgiving: a slight consistent fall toward each outlet, enough to drain, not so much that it reads from the street. Inside corners on a complex roof are where two planes dump into a single trough, and those are the first spots to overflow when outlet placement is lazy.

The last piece is where the water goes. A downspout ending at the foundation has concentrated an entire roof slope into one spot beside your basement wall. Extensions, buried drain lines or splash blocks routing well away from the house are the difference between a gutter system and an expensive decoration, and with the clay soils around this metro that is a foundation question, not a roofing one.