Gutter Glossary

Apron
See Gutter Apron. A flashing piece that directs water from the roof edge into the gutter trough instead of behind it.

Backsplash
Water bouncing off a splash block or the ground and hitting the siding or foundation because a downspout is discharging too close to the house.

Bracket
A general term for any support piece that holds a gutter to the fascia or roof edge, including fascia brackets, roof-strap hangers, and hidden hangers.

Capacity (Gutter Capacity)
The volume of water a gutter can carry per minute before it overflows, determined by the gutter's cross-sectional size (such as 5-inch or 6-inch K-style) and its slope.

Conductor Head
A funnel-shaped box mounted where a gutter run meets a downspout, used to collect water from multiple directions and reduce splashing before it enters the downspout, often seen on commercial or historic buildings.

Corner Miter
See Miter. The angled joint where two gutter runs meet at an inside or outside corner of a roofline.

Corrosion
The gradual breakdown of a metal gutter or downspout caused by prolonged exposure to moisture, often accelerated at spots where water pools or where two different metals are in contact with each other.

Crimped End
A downspout end that has been pinched or narrowed slightly so it can nest inside the next section of downspout below it, allowing sections to telescope together without additional fasteners.

Discharge Point
The location where a downspout releases collected water, whether onto a splash block, into a downspout extension, or into an underground drainage line.

Downspout
The vertical pipe that carries water from the gutter trough down to the ground or a drainage system. Also called a leader.

Downspout Extension
A removable or fixed section of pipe attached to the bottom of a downspout that carries discharged water several additional feet away from the foundation.

Downspout Outlet
The opening cut into the bottom of a gutter trough where water exits into the downspout, typically reinforced with a strainer or outlet fitting to reduce clogging.

Drip Edge
A metal flashing installed along the roof edge, under the shingles and over the fascia, that directs water away from the fascia board and into the gutter.

Elbow
A bent fitting used in a downspout run to change direction, such as routing a downspout around a roof overhang or offsetting it toward the wall.

End Cap
A fitting that seals the open end of a gutter run so water cannot spill out the side. Left and right end caps are shaped as mirror images of each other.

European Gutter
A large-profile, often half-round or ogee-shaped gutter system associated with high-end or historic homes, typically installed with decorative brackets rather than hidden hangers.

Fascia
The vertical board that runs along the lower edge of a roofline, behind the gutter, which the gutter hangers or brackets are typically fastened to.

Fascia Bracket
A support bracket that mounts to the fascia board and holds the gutter from below or the side, often used with half-round or European-style gutters instead of hidden hangers.

Fascia Rot
Decay of the fascia board, usually caused by water overflowing or leaking behind the gutter over time, which can weaken the surface that gutter hangers are anchored to.

Ferrule
A short metal sleeve used with a spike to hold the top of a gutter to the fascia, keeping the gutter's shape from being crushed when the spike is driven through it. See Spike and Ferrule.

Flashing
Thin sheet metal installed at roof edges, valleys, and joints to direct water away from vulnerable seams, including the drip edge and gutter apron used alongside gutter systems.

French Drain
An underground gravel-filled trench with a perforated pipe, sometimes connected to downspout extensions to carry water further from the foundation and disperse it below grade.

Galvalume
Steel coated with a blend of aluminum and zinc, used for gutters that need extra corrosion resistance and strength, often in commercial or high-snow-load applications.

Galvanized Steel
Steel coated with a layer of zinc to resist rust, used for gutters where strength and heavy snow-load durability matter more than light weight.

Gutter Apron
A flashing piece installed at the roof edge that tucks under the shingles and laps over the back of the gutter, preventing water from running behind the gutter and down the fascia.

Gutter Guard
A cover or screen installed over a gutter to keep leaves and debris out while allowing water to flow through, reducing how often the gutter needs to be cleaned.

Gutter Helmet / Leaf Guard (generic)
Common brand-style names used generically for solid-cover gutter guard systems that shed leaves off the top of the gutter while channeling water in through a narrow opening.

Gutter Machine
A portable, often trailer- or truck-mounted machine that forms seamless gutter directly from a coil of raw material on-site, cut to the exact length of each roofline run.

Gutter Strainer
A dome- or basket-shaped screen placed over a downspout outlet to catch leaves and debris before they can clog the downspout itself, distinct from a full-length gutter guard.

Half-Round Gutter
A gutter style shaped like a tube cut in half lengthwise, giving it a smooth, open, rounded trough. Common on historic and higher-end homes, typically paired with round downspouts and fascia brackets.

Hanger (Gutter Hanger)
A bracket that holds the gutter in place along the fascia. See Hidden Hanger and Spike and Ferrule for the two most common types.

Hidden Hanger
A modern gutter hanger that clips inside the front and back lips of the gutter and screws into the fascia, holding the gutter without any visible fasteners from the front. The standard hanger type on most new seamless gutter installations.

Ice Dam
A ridge of ice that forms at the eave of a roof when melting snow refreezes before it can drain off, sometimes backing water up under shingles or into gutters. Caused primarily by uneven roof heat loss rather than the gutters themselves.

K-Style Gutter
The most common residential gutter profile, with a flat back for mounting flush against the fascia and a decorative front face resembling crown molding. Holds more water than half-round gutters of the same nominal size.

Leader
Another name for a downspout, more commonly used in older or regional terminology and in conductor-head systems.

Leaf Screen
A simple mesh or perforated cover placed over a gutter to block larger leaves while still letting smaller debris and water pass through. Less fine than a micro-mesh guard.

Micro-Mesh Guard
A gutter guard using a very fine woven or perforated screen designed to block small debris such as pine needles and shingle grit while still allowing water through.

Miter
The angled cut and joint used to connect two gutter runs at a corner, formed either on-site during seamless fabrication or with a pre-formed corner piece.

Ogee Gutter
A decorative gutter profile with a curved, S-shaped front face, often used on historic or high-end homes for its molded architectural appearance.

Overflow
Water spilling over the front lip of a gutter during heavy rain, typically caused by an undersized gutter, clogged debris, incorrect pitch, or insufficient downspouts for the roof area.

Pitch (Slope)
The slight downward angle built into a gutter run so water flows toward the downspout instead of pooling. Also called slope.

Ponding
Standing water that collects in a low spot of a gutter because of incorrect pitch, a sagging hanger, or debris blocking flow, which can accelerate corrosion and rust at that spot.

Rain Diverter
A short strip of flashing installed above a doorway or walkway to redirect water away from a specific spot where a roof valley or gutter gap would otherwise let water spill through.

Rust
Iron oxide corrosion that forms on unprotected or damaged steel gutters and hangers, one of the reasons galvanized coatings, aluminum, or other rust-resistant materials are commonly used instead of bare steel.

Sag / Sagging Gutter
A gutter run that has begun to droop between hangers, usually caused by failing or widely spaced hangers, rotted fascia, or the added weight of trapped debris and water.

Sealant (Gutter Sealant)
A weatherproof caulk or sealant applied at joints, corners, and end caps to keep water from leaking through the seams of a gutter system. Breaks down over time from sun and temperature changes and periodically needs to be reapplied.

Seamless Gutter
A gutter formed on-site from a single continuous piece of material to match the exact length of a roofline, eliminating the mid-run seams found in sectional gutters. Seams remain only at corners, end caps, and downspout connections.

Sectional Gutter
A gutter system built from pre-cut lengths (commonly 10 feet) joined together with slip connectors on-site, resulting in a seam at every joint.

Slip Joint
A connector used to join two sections of sectional gutter, where one section overlaps the other and is sealed with sealant rather than being seamlessly formed as one piece.

Soffit
The horizontal underside of a roof overhang, beneath the fascia, which often contains ventilation for the attic. Not part of the gutter system itself but adjacent to where gutters are mounted.

Spike and Ferrule
An older-style gutter hanger consisting of a long spike driven through the front and back of the gutter and the fascia, with a ferrule sleeve inside the gutter to keep it from being crushed. Largely replaced by hidden hangers on new installations because spikes tend to work loose over time.

Splash Block
A small, sloped block placed under a downspout outlet to direct discharged water away from the foundation and prevent soil erosion at that spot.

Trough
The open channel of a gutter that actually carries water, as opposed to the hangers, end caps, and downspouts that support and drain it.

Vinyl Gutter
A plastic gutter material that is lightweight and inexpensive to install, but more prone to cracking in extreme cold and less durable overall than metal options.

Zinc Gutter
A metal gutter material that develops a protective patina over time similar to copper, offering strong corrosion resistance and a long lifespan at a lower cost than copper, though less common and harder to source than aluminum.