Gutters in Longmont, CO

Seamless aluminum gutters, oversized downspouts, and hail-ready guards engineered to move St. Vrain Valley stormwater away from your Longmont foundation.

Family-owned · Licensed & insured · 4.9★ from 150+ Front Range reviews · Owens Corning Platinum Preferred

Longmont sits low and exposed at the mouth of the St. Vrain Valley, out on the plains where the foothills no longer slow the weather down. That means the spring and summer storms rolling off the mountains arrive with real force, dropping hail that dents and crimps metal and packing the kind of heavy, fast downpours that overwhelm an undersized gutter in minutes. When the channels can't keep up, water sheets over the edge and runs straight down your fascia, siding, and foundation. CR Custom Exteriors sizes gutters for what Longmont actually gets, not for some mild, average climate that never shows up here.

From the older homes around Old Town and Downtown Longmont to the newer builds in Prospect New Town, Southmoor Park, and Fox Hill, we install seamless aluminum gutters with oversized downspouts and guards built to take Front Range hail and shed heavy water without clogging. Just as important, we set the correct pitch and drainage so water leaves the structure instead of pooling against it, and we account for the freeze-thaw ice loading that bends and tears poorly hung gutters every Longmont winter. We're a family-owned, licensed and insured company based just down the road in Erie, with 10-plus years of experience and a 4.9-star rating across 150-plus Google reviews.

Sized for Longmont cloudbursts and hail

We run seamless aluminum gutters with oversized downspouts and impact-resistant guards built to swallow the heavy summer downpours and shed the hail that rolls off the foothills onto Longmont rooftops, instead of overflowing onto your fascia and foundation.

Pitch and drainage done right

We set the correct slope and route downspouts to carry water well away from the foundation, fascia, and siding, which is what actually protects a Longmont home from the rot, settling, and erosion that bad drainage causes over time.

Integrated with your roof and siding

As a full exterior contractor, we tie gutters into your roof and siding work so flashing, fascia, and drip edge all line up, and we account for the freeze-thaw ice loading that pulls cheaply hung gutters loose every Longmont winter.

Common questions

What gutter material holds up best in Longmont's climate?
For most Longmont homes we recommend seamless aluminum. It resists rust, won't be torn apart by freeze-thaw ice loading the way some systems are, and stands up well to the hail that comes off the foothills here. Seamless runs are cut to fit your home on site, so there are far fewer joints to leak or fail. We'll walk you through guard options and downspout sizing for your specific roof and budget.
What affects the cost of new gutters in Longmont?
Cost depends on the total linear footage, the number of stories and corners, the downspout sizing, and whether you add gutter guards. Larger or steeper homes in areas like Clover Basin or Renaissance need more material and more careful routing to handle runoff. We give every Longmont homeowner a clear, free written estimate after looking at the home, so there are no surprises.
Why do oversized downspouts and guards matter for Longmont homes?
Longmont's storms deliver a lot of water in a short window, so standard downspouts can back up and let gutters overflow against your siding and foundation. Oversized downspouts move that volume away faster, and guards sized for hail and debris keep the channels clear so water never has a reason to spill over. Together they protect the foundation, fascia, and siding the gutters are there to defend.

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