Guards

Gutter Screens vs Gutter Guards: A Tree-by-Tree Guide

By St. Louis Gutter Service · October 23, 2026 · 8 min read

The usual question is gutter screens vs gutter guards, as if one of them wins. Under St. Louis trees it doesn't work that way. There's the best cover for a pin oak, which is not the best cover for a silver maple, which is the wrong cover for a sycamore. Salespeople tend to sell one product to every house. Here's a tree-by-tree way to decide, based on how each type handles the debris that actually falls on metro roofs.

Gutter screens vs gutter guards, in plain terms

"Gutter covers" is the umbrella term. Most of what's sold falls into three types:

Screen — a perforated or expanded-aluminum panel that sits over the gutter. Holes are big, so it stops big leaves and passes small stuff. Screened gutters are the cheapest option at $5–$9 a foot installed.

Micro-mesh — a fine stainless steel mesh on an aluminum frame, screwed to the gutter lip and tucked under the first shingle course, sloped with the roof. Stops nearly everything; needs to be swept once a year. $10–$18 a foot.

Reverse-curve — a solid hood that water clings to and follows around a lip into a narrow slot, while debris slides off. $18–$30 a foot. Overshoots in heavy rain, grows icicles in January, and small debris rides the water into the slot.

When people ask for rain gutters that keep leaves out, they usually mean one of these three. None of them keeps everything out forever; they change the maintenance from scooping to sweeping.

Tree by tree

Sycamore. Enormous leaves in October, bark flakes all winter, seed balls that break up in spring. Screen handles the leaves well and the seed balls sit on top until wind takes them. Micro-mesh works too and is overkill unless there are other trees. Reverse-curve collects the leaves on its nose in a wet October and then holds them under ice. Best fit: screen, or mesh if mixed with other trees.

Pin oak. The Kirkwood, Webster Groves and University City problem. Pin oak debris is small, stiff leaves from late November into December, plus acorns and caps that are exactly the size to jam a screen hole. Screens clog from underneath as the leaves stack in the holes. Best fit: micro-mesh, with a broom pass in December.

Silver maple. Helicopters by the thousand in May. They go straight through screens and pile up in the downspout elbow — one of the most common early-summer clogs in the metro. Best fit: micro-mesh. Nothing else really works.

Sweetgum. Leaves in November, then sweetgum balls through winter. The balls roll into a gutter behind a screen and sit on a reverse-curve's nose. Best fit: micro-mesh, or screen with a spring flush.

Cottonwood and elm. Fluff in June, small leaves in October. Fluff mats on mesh and rinses off with a hose; screens pass it. Best fit: micro-mesh in the river bottoms and the Chesterfield valley.

Pines and spruces. Less common in St. Louis yards but planted as screens in 1970s subdivisions. Needles lie flat through screens and mat on mesh. Best fit: fine-weave micro-mesh, and a yearly blower pass.

Ornamentals, young trees, and treeless lots. Crabapple, redbud, dogwood, or a new-build lot in O'Fallon or Wildwood. Best fit: no guards. A $150 cleaning every other year is cheaper than $1,500 of mesh.

The rain question

St. Louis thunderstorms come at an inch or two an hour. A guard has to pass that much water, or the gutter is dry and the water is on the ground. Screen passes everything. Micro-mesh passes it if it's installed at the roof pitch so water hits at an angle; laid flat, a fine mesh can sheet water over the front in a downpour. Reverse-curve relies on surface tension, and at two inches an hour surface tension loses; the water shoots past the slot. That's the main reason reverse-curve hoods are a poor fit here.

The ice question

Guards don't cause ice dams; attic heat loss does. But a reverse-curve hood on a north eave grows a row of icicles off its lip, and a gutter that's holding water because it's lost its pitch freezes solid whatever's on top. No guard should go on a gutter that doesn't drain. The guards page covers that, and ice dams in gutters has the winter detail.

When the math works

Two cleanings a year at $150–$300 each is $300–$600 a year. Micro-mesh on a 160-foot house is $1,600–$2,900. Under heavy trees it pays back in six to eight years and cuts the work to one broom pass. Under a redbud it never pays back. Under a sycamore alone, an $800 screen job pays back in two or three years. Run your own numbers before anyone runs theirs for you at your kitchen table.

Before you buy

Ask the price per foot. Ask whether the mesh is stainless or polymer. Ask how it attaches — to the gutter lip and under the shingle, never nailed through the roof — and check your shingle warranty if anything goes under the first course. Ask what the guarantee covers in writing, because "never clean your gutters again" is not a guarantee, it's a slogan. And ask the person to look at your trees before they name a product. If they don't look up, they're selling, not advising. A gutter cleaning visit is a good moment to have someone look at the trees and the debris from above before you commit.

Step by step: picking a cover for your house

1. Name the trees. Walk the lot and list every tree whose branches reach within about twenty feet of the roof. Include the neighbor's.
2. Check the calendar. Note what falls when: maple seeds in May, cottonwood fluff in June, sycamore leaves in October, oak leaves into December.
3. Look in the gutter. What's in it now tells you more than any brochure. Big leaves, small leaves, seeds, needles or grit from the shingles.
4. Fix drainage first. A run that holds water, sags or leaks at the corners needs repair before anything goes on top of it.
5. Match the table. Pick the cover that rates "Good" for your worst tree, not your nicest one.
6. Do the math. Compare the installed price with what two cleanings a year cost you now.
7. Get it in writing. Price per foot, mesh material, how it attaches, and what the guarantee actually covers.

Mistakes people make with guards

• Buying for the wrong tree. A screen chosen for a sycamore will clog under a pin oak next door.
• Covering a gutter that doesn't drain. The cover hides the standing water until the corners rust or freeze open.
• Forgetting the downspouts. Seeds and grit still reach the elbows. Plan a flush every year or two.
• Assuming no maintenance. Mesh still needs a broom pass. Screens still need lifting now and then.
• Skipping the second story. The high eaves are the ones you can't reach, so they're the ones that most need a cover that works.

Common questions

Is gutter mesh necessary?

Not on every house. Under pin oaks, silver maples or pines, mesh is the only cover that reliably stays clear, so it usually earns its cost. Under a single sycamore a cheaper screen does the job, and on a lot with only ornamental trees no cover is needed at all.

Which gutter guard works best under oak trees?

Stainless micro-mesh installed at the roof pitch. Oak leaves are small and stiff and acorn caps jam screen holes, so screens clog from underneath. Even mesh benefits from a quick broom pass after the oaks finish dropping in December.

Do gutter guards work with sweetgum balls?

Partly. The spiked balls roll off most mesh and screen surfaces, but they can lodge behind a loose screen or on a reverse-curve nose. Micro-mesh fitted tight to the lip handles them best, and a spring rinse clears the ones that stay put.

Are gutters with screens harder to clean?

Gutters with screens are easier day to day but awkward when they do need a clean-out, because the screen has to come off. Snap-in screens lift out quickly; screwed-down mesh takes longer. Ask how the cover comes off before it goes on.

Can I install gutter screens myself?

Snap-in screens on a single-story house are a reasonable weekend job if you are steady on a ladder. Micro-mesh that tucks under the shingles takes more care, because a lifted shingle can leak. On two-story eaves, the ladder risk is usually the reason to hire it out.