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City of Alpharetta

Gutter cleaning, repair and new gutters in Alpharetta, GA

Around Alpharetta, the NOAA normal is 56 inches a year, with 18 inch-plus days. Summer (June to August) is the wettest stretch (15.1 in). Each 1,000 square feet of roof drains 34,900 gallons a year.

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Alpharetta: rain and roofs

NOAA station USC00096407, 9 mi
56.3″
Alpharetta: yearly rain
NORCROSS station
17.9
Inch-plus rain days
per year
34,900
Roof runoff, Alpharetta
gallons per 1,000 sq ft a year
7.98″/hr
Design burst
5 min, 10-year (Atlas 14)
Nov 9
Frost arrives
median first fall frost
1996
Typical house built
median, Census ACS
8%
Pre-1980 houses
Census ACS
Winter14.9 in
Spring13.3 in
Summer15.1 in
Fall13.0 in

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

Inch-plus rain days put Alpharetta 1st for heavy-rain days of the 76 places on this site (17.9 a year). Its housing stock is near the middle of the 76 places on this site (half built by 1996). For fall frost it is near the middle of the 76 places on this site (November 9).

Cleanout calendar

Median frost dates for Alpharetta: first in fall about November 9, last in spring about March 25 (NOAA). Wait for the frost and bare branches before the fall cleanout; come back after the yellow spring pollen settles.

More on the timing, and on how the trees over a roof change it: when to clean gutters in metro Atlanta.

Downpours and downspouts

Think of the five minutes when a storm opens up. For Alpharetta, NOAA Atlas 14 puts the ten-year, five-minute burst at 7.98 inches an hour. Using the Copper Development Association rule, that means roughly 900 sq ft of roof per 2×3 downspout, or 1,800 sq ft per 3×4.

Work out your own roof with the gutter size calculator, which uses this figure for Alpharetta.

Alpharetta’s houses

The typical house in Alpharetta dates to 1996, and 8% predate 1980 (Census ACS). The builder’s gutters are still up on most of these houses; they mostly need keeping clear.

Owners occupy 68% of homes; 57% are single-family detached and 12% attached. Check HOA rules before changing gutter color or style.

Runoff, drains and the county

Alpharetta is an incorporated city, so questions about street drains, ditches and runoff start with the city’s public works office; Fulton County answers for the unincorporated areas around it. Wherever the water goes, it should leave the downspout well clear of the foundation and the beds along it. Downspouts and drainage

Common calls from Alpharetta

17.9 inch-plus days a year expose clogs and short downspouts fast.

Next door

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