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Prince George's County, Maryland

Gutter cleaning, repair and new gutters in National Harbor, MD

National Harbor gets about 47 inches of rain in a normal year, and on about 13 days a year an inch or more falls in a single day. The wettest season is summer (June to August), with about 14.0 inches; the driest is winter (December to February), with 9.7. Every 1,000 square feet of roof sheds about 29,000 gallons a year, and all of it goes through the gutters.

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National Harbor: rain and roofs

NOAA station USC00186800, 1 mi
46.8 in
Rain in a normal year, National Harbor
NOAA normal, OXON HILL
13.1
Days with an inch or more
a year
29,000 gal
Water off 1,000 sq ft of roof in National Harbor
0.62 gal per sq ft per inch
6.82 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 2
Nov 8
First fall frost
median date
2002
Median year homes were built
ACS 2020–2024
40%
Homes built before 1980
ACS 2020–2024
Winter9.7 in
Spring11.9 in
Summer14.0 in
Fall11.3 in

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

For days with an inch of rain or more, National Harbor ranks 18th for heavy-rain days of the 329 places in Maryland on this site (13.1 a year). By house age it falls among the newest by median year built of the 329 places in Maryland on this site (half built by 2002). The first frost here ranks near the middle of the 329 places in Maryland on this site (November 8).

When to clean gutters in National Harbor

The first fall frost comes around November 8 in a typical year here, and the last spring frost around April 3 (median dates, NOAA normals). Plan the fall visit for after the frost, when the trees over the roof have finished dropping, and the spring visit for after the pollen and catkins.

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

Gutter and downspout size for National Harbor rain

What overwhelms a gutter is a burst, not a season. In National Harbor the five-minute rain expected about once in ten years falls at 6.82 inches an hour (NOAA Atlas 14 Volume 2). At that rate one 2-by-3-inch downspout drains about 1,060 square feet of roof and one 3-by-4-inch downspout about 2,110, 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.

The houses in National Harbor

Half the homes in National Harbor were built by 2002, 40% before 1980 (ACS 2020–2024). In a neighborhood that young, many houses still have the gutters the builder put up, and the usual call is a cleaning, a leak or guards rather than a full replacement. 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.

54% of households own their home, and 23% of homes are detached houses, 14% 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 National Harbor

In a neighborhood with half its homes built by 2002, the usual calls are cleaning, guards and small repairs. The line takes all of it:

Nearby

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