Crawford County, Iowa
Gutter cleaning, repair and new gutters in Denison, IA
Rain in Denison adds up to about 34 inches in a normal year, with about 8 days that bring an inch or more. The wettest season is summer (June to August), with about 13.5 inches; the driest is winter (December to February), with 2.9. That is about 20,900 gallons a year off each 1,000 square feet of roof, every drop of it through a gutter and a downspout.
Call (866) 228-6229 free call to a gutter contractor serving DenisonDenison: rain and roofs
NOAA station USC00132171, 2 miBars to one scale; the longest is summer (June to August).
Counting days with an inch of rain or more, Denison sits among the fewest heavy-rain days of the 290 places in Iowa on this site (7.8 a year). By house age it falls near the middle of the 290 places in Iowa on this site (half built by 1973). By first frost it falls near the middle of the 290 places in Iowa on this site (October 11).
When to clean gutters in Denison
The first fall frost comes around October 11 in a typical year here, and the last spring frost around April 27 (median dates, NOAA normals). Booking the fall cleaning after the first frost, once the trees over the roof are bare, catches the season’s drop in one visit; the spring cleaning comes after the pollen and catkins are down.
When to clean gutters explains how the trees over a roof change the schedule.
Gutter and downspout size for Denison rain
The short, hard downpour is what a gutter is sized for. In Denison the five-minute rain expected about once in ten years falls at 7.84 inches an hour (NOAA Atlas 14 Volume 8). At that rate one 2-by-3-inch downspout drains about 920 square feet of roof and one 3-by-4-inch downspout about 1,840, by the rule in the Copper Development Association’s design handbook. Try your own roof in the gutter and downspout calculator, which starts from this figure.
Denison averages about 35 inches of snow a year (NOAA normals). Snow on a roof brings ice dams: heat escaping from the house melts the snow, and the water refreezes at the cold eave, in the gutter and over it. University of Minnesota Extension puts the cause in the attic, not in the gutter, so a gutter that fills with ice is a symptom; hangers spaced to carry ice and a sound fascia are what the gutter itself needs.
The houses in Denison
Half the homes in Denison were built by 1973, 70% before 1980 (ACS 2020–2024). Houses that age have often had their gutters replaced once already; if not, the original runs and the boards behind them deserve a close look. On a house built before 1978, replacing more than 20 square feet of painted fascia or trim falls under the EPA’s lead-safe rule, so ask whether the crew is certified.
74% of households own their home, and 62% of homes are detached houses, 6% townhouses. If an association maintains the exterior, the gutters may be its job rather than yours; check before calling.
Hiring in Iowa
Licensing for gutter work differs from state to state; ask a contractor in Denison which license or registration they hold in Iowa, and for proof of liability insurance. Hiring a gutter contractor
Gutter work in Denison
With half the homes built by 1973, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: