Gutter Guard Terms Glossary

Micro-Mesh

A fine stainless-steel or aluminum mesh (often 50–275 microns) that blocks debris finer than standard screen guards catch, including pine needles and shingle grit.

Reverse-Curve / Surface-Tension Guard

A solid, curved guard that uses water's surface tension to pull rain into the gutter while debris slides off the front edge onto the ground.

Foam Guard

A porous foam insert that sits directly inside the gutter channel — water passes through while debris stays on top.

Brush Guard

A bristled, cylindrical insert (resembling a large pipe-cleaner) that lies inside the gutter channel; debris collects on top of the bristles.

Micron

The unit used to describe mesh opening size on micro-mesh guards; a lower micron number means a finer mesh that blocks smaller debris.

Shingle-Tuck Installation

A mounting method where the guard's edge is installed under the first course of roof shingles, rather than clipping onto the gutter lip.

Fascia

The board along the roofline edge where gutters (and by extension, gutter guards) are mounted.

K-Style Gutter

The most common residential gutter profile in the U.S. — most gutter guard products are designed to fit this profile.

Overshoot

When rainwater flows past the gutter opening entirely instead of draining into it — most commonly a risk with poorly installed reverse-curve guards in heavy rain.

Linear Foot

The unit gutter guards are priced by — the length of gutter being covered, not square footage.

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