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Gutter cleaning, repair and new gutters in Gaithersburg, MD

Rain in Gaithersburg adds up to about 41 inches in a normal year, with about 10 days that bring an inch or more. The wettest season is summer (June to August), with about 11.0 inches; the driest is winter (December to February), with 9.1. Off a 1,000-square-foot roof, that comes to about 25,600 gallons a year for the gutters to carry.

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Gaithersburg: rain and roofs

NOAA station USC00187705, 4 mi
41.3 in
Rain in a normal year, Gaithersburg
NOAA normal, ROCKVILLE 1 NE
10.1
Days with an inch or more
a year
25,600 gal
Water off 1,000 sq ft of roof in Gaithersburg
0.62 gal per sq ft per inch
6.54 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 2
Nov 6
First fall frost
median date
1989
Median year homes were built
ACS 2020–2024
31%
Homes built before 1980
ACS 2020–2024
Winter9.1 in
Spring10.4 in
Summer11.0 in
Fall10.8 in

Bars to one scale; the longest is summer (June to August).

By heavy-rain days, Gaithersburg falls among the fewest heavy-rain days of the 329 places in Maryland on this site (10.1 a year). Its housing ranks near the middle of the 329 places in Maryland on this site (half built by 1989). The first frost here ranks near the middle of the 329 places in Maryland on this site (November 6).

When to clean gutters in Gaithersburg

The first fall frost comes around November 6 in a typical year here, and the last spring frost around April 1 (median dates, NOAA normals). A fall cleaning set for the weeks after that frost, when the branches over the house are bare, gets the year’s leaves in one trip; a spring visit follows once the pollen and catkins have come down.

When to clean gutters explains how the trees over a roof change the schedule.

Gutter and downspout size for Gaithersburg rain

Gutters are sized for the worst few minutes of a storm, not for the year. In Gaithersburg the five-minute rain expected about once in ten years falls at 6.54 inches an hour (NOAA Atlas 14 Volume 2). At that rate one 2-by-3-inch downspout drains about 1,100 square feet of roof and one 3-by-4-inch downspout about 2,200, 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.

Gaithersburg averages about 31 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 Gaithersburg

Half the homes in Gaithersburg were built by 1989, 31% before 1980 (ACS 2020–2024). At that age a gutter has seen decades of leaves and storms, and the fascia it hangs from has too.

51% of households own their home, and 20% of homes are detached houses, 29% townhouses. Where an HOA governs the exterior, its rules on gutter color and style apply before any order is placed.

Hiring in Maryland

Maryland requires a Maryland Home Improvement Commission license for home improvement work of any amount, gutters included, and a contractor may not take a deposit of more than one third of the contract price (Business Regulation § 8-617). Look the license up before signing, and keep the deposit to one third or less.

Source: Maryland Business Regulation § 8-101. Look-up: Maryland Home Improvement Commission, public query.

Gutter work in Gaithersburg

In a neighborhood with half its homes built by 1989, the usual calls are cleaning, guards and small repairs. The line takes all of it:

Nearby

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