Gutters matter in a wildfire because dry needles and leaves in them give wind-blown embers fuel right at the edge of the roof. Colorado’s 2025 Wildfire Resiliency Code handles the material side: on every mapped wildland-urban interface parcel, gutters and downspouts must be noncombustible, which rules out vinyl. The other half is upkeep. NFPA and the Colorado State Forest Service both put clearing roofs and gutters of leaves, needles and debris near the top of their homeowner lists. This page covers both, as general information; check your local code for the exact rules on your address.
On this page: Why gutters catch fire · What the code says · Materials · Guards · Cleaning plan
Why a gutter is an ember trap
IBHS, the insurance industry’s research institute, says embers can travel more than a mile ahead of a wildfire and settle in vulnerable places around a home, and it names gutters among them. A gutter is a long trough sitting under the roof edge that catches whatever slides off. In the foothills and in places like Black Forest and Woodland Park, that is often a mat of ponderosa needles. Once an ember lands in that mat, a small fire sits directly against the fascia and the lowest course of roofing.
Colorado’s own homeowner checklist from the Colorado State Forest Service starts with two items in this order: make sure the roof has a Class A fire rating, and remove leaves, needles and other debris from decks, roofs and gutters. The first is a one-time purchase. The second is a habit.
What the Colorado code says about gutters
| Item | State code section | Requirement |
|---|---|---|
| Gutters and downspouts | 403.3 | Noncombustible material |
| Roof valleys | 403.2.2 | Corrosion-resistant metal at least 0.019 in. (26-gauge) over a 36 in. ASTM D3909 cap sheet |
| Roof covering | 403.2 | Class A covering or assembly |
| Ground below the drip line, 0 to 5 ft | 502.1 | Hard noncombustible surfaces; combustible mulch removed |
All four are Class 1 items, so they apply on every mapped parcel, whatever the fire intensity class. On an existing home, they come into play when a reroof crosses the code’s 25 percent trigger, which our Colorado Wildfire Resiliency Code guide explains. The 0 to 5 foot rule matters for gutters because downspouts often empty into bark mulch beds against the foundation; swapping that mulch for rock or a splash block removes another ember target. See our defensible space zones guide.
Gutter materials compared
| Material | Noncombustible? | Notes for Colorado homes |
|---|---|---|
| Seamless aluminum | Yes | The most common choice; light and rust-free |
| Galvanized or painted steel | Yes | Stiffer under snow and ladders |
| Copper | Yes | Long life, higher price |
| Vinyl | No | Does not meet the state code on mapped parcels |
The code speaks to the material, so the color and profile are up to you. Our Colorado Springs gutters page compares seamless, K-style, half-round and box profiles.
Gutter guards help, but do not replace cleaning
Guards keep most needles out of the trough, which reduces the fuel bed, and they reduce trips up the ladder. They also shift the problem: needles can pile up on top of a guard and along the roof edge behind it. If you add guards on a mapped parcel, a metal guard is more in line with the noncombustible intent of the code than a plastic one, even though the state model code text does not regulate guards directly. Our gutter guards page compares styles.
A cleaning plan for Colorado pines
- Spring check. Clear winter needle drop and look for sagging sections and separated seams from snow load.
- Fall clean-out. After aspens and other broadleaf trees drop their leaves, clean gutters, valleys and the area behind chimneys.
- After big wind. Front Range wind events strip needles and small branches onto roofs.
- Before you leave in fire season. If a red flag warning is forecast and you are traveling, clear the gutters before you go.
- Look at the roof, not just the trough. Debris in valleys and against skylights and walls is the same hazard, and it shortens roof life too.
Gutters are one part of a roof that resists embers. The others are a Class A roof with metal valleys and ember-resistant vents. For the full picture, see our wildfire home hardening guide.
Gutters with your roof
Integrity Roofing and Painting is veteran-owned and has been family-run since 1990. We are an Owens Corning Platinum Preferred contractor with 650+ Google reviews. When we replace a roof we look at the gutters, drip edge and valleys together, and we can replace vinyl or failing gutters with seamless metal. Our Denver office installs metal gutters too. Call (719) 488-2800 for a free Colorado Springs inspection, or (303) 209-0152 for a free Denver inspection.
Gutter cleanup is on both our wildfire season home checklist and our spring and fall roof maintenance checklist.
Sources: 2025 Colorado Wildfire Resiliency Code, sections 403 and 502 (DFPC); Colorado State Forest Service, Protect your home and property; NFPA, Preparing homes for wildfire; IBHS, Wildfire Prepared Home: About.
