Why Gutter Slope is Essential to Your Home

Having a properly-functioning gutter system is essential in protecting your home from flooded basements, eroded landscaping, damaged foundations, and other problems caused by misdirected runoff water. Upon first glance, hanging a gutter system appears to be pretty easy; however, the actual installation process can be very difficult in order for the gutters to work as intended.

One of the biggest challenges involved in gutter installation is establishing the proper slope of the guttering. From a distance, gutters appear to parallel the roofline; but in reality, they must be sloped ever so slightly so the runoff water can flow “downhill” to the downspouts.

What is Gutter Slope?

Why gutter slope is essential to your home.
An incorrect slope can cause substantial gutter system malfunction.

Technically speaking, the slope (also called the pitch) of the gutters is the amount by which the gutters slant downward along the path of the water flow. If gutters are not sloped enough, the water will simply pool in the gutters and eventually spill over their sides. If the gutters are sloped too sharply, their capacity is reduced and splashover could occur in heavy rains; plus they tend to look strange to the naked eye.

Gutter Slope Rules

So what’s the ideal amount of slope for your gutters? Most contractors tend to set the slop at one quarter inch per ten feet of guttering. So if you have a 25-foot section of guttering, you should set the downspout end of the gutter 5/8 of an inch lower (1/4 x 2.5 = 5/8) than the other end.

This brings up another important rule to keep in mind: all guttering must slope toward the nearest downspout. So if your roofline is 50 feet long and you have a downspout at either end, then you should build in a 5/8 inch slope from the middle of the roofline to both ends.

Why gutter slope is essential to your home.
Usually, the downspout is placed near the corner of a home.

In addition, it’s wise to install one downspout for at least every 30 feet of guttering. So in the example of a 50-foot roofline, it wouldn’t be wise to slope the entire run from one end to the other; this will look unsightly and may not work as well. In addition, since runoff water doesn’t generally move around corners very well, it may be necessary to install extra downspouts where the roofline bends.

How To Determine Gutter Slope

The best way to calculate the slope of a gutter run before hanging it is to use a long string and a string level. First, determine the location of each one of your downspouts. Then fasten one end of the string at the highest point of the gutter and the other at the spot where the downspout will be. Use the line level to make sure the string is perfectly parallel to the ground.

Next, measure the length of the string and calculate how much slope you will need. Using the above example of a 25 foot gutter run, the correct slop is 5/8 of an inch. So for that project you should take the end of the string (where the downspout will be) and lower it exactly 5/8 of an inch, then reattach it. After marking both ends of the string with a pencil, remove the string. Then snap a chalk line from the two marks you have made to illustrate the line along which you will install your gutters.

Why gutter slope is essential to your home.
This is what a chalk line tool looks like.

Harry Helmet Can Install Seamless Gutters

Unless you are very handy with tools or have an extensive DIY background, you may be best served to call in a contractor to hang your new gutters. Harry Helmet provides high-quality, attractive seamless gutters that are made with 32-gauge aluminum, which exceeds the industry standard. These seamless gutters will be installed by certified professionals and are backed by a 20-year warranty.

To schedule a free, on-site appointment for seamless gutter installation, contact Harry Helmet at 1-888-5-HELMET or fill out and submit this form today.

Written by Del Thebaud

38th Anniversary Sale
$380 OFF
Hurry - Offer Ends July 31st
By clicking below, I ask that Harry Helmet call me so I can learn more about its products.

REVIEWS

100,000 HAPPY CUSTOMERS & COUNTING

I recently had the Gutter Helmet by Harry Helmet installed on my house. It not only looks amazing, but the guys arrived on time, were professional and efficiently got the job done. I am very satisfied with Gutter Helmet's attention to detail and fulfilling their work as promised. I will definitely tell my neighbors about the Gutter Helmet.
StarStarStarStarStar
I have had Gutter Helmets for 20 years. In all that time I've never had a problem until recently a bird's nest found its way into one of my gutters. The installer who came to replace the product was the same installer from 20 years earlier. Now that's impressive. Everyone at Gutter Helmet inclusive of the office staff were professional and a pleasure to work with.
StarStarStarStarStar
Gutter Helmet by Harry Helmet just replaced our roof and we could not be more satisfied. The crew showed up early, worked all day and stayed late, were professional and caring regarding the project and the surrounding impact it had on our property and home. They completed the roof quickly and it looks simply amazing!
StarStarStarStarStar
VERY happy with our entire experience adding Gutter Helmet by Harry Helmet to our house. Installing this was a great value for us. The gutters are working perfectly in heavy downpours and with year-long leaves and debris coming down from our river birches. Terrific customer service and a first class product.
StarStarStarStarStar
We needed our roof repaired due to wind damage. After several quotes, Gutter Helmet was the only company that went into our attic to look and see if more damage had occurred. If it wasn't for them taking the extra time to look at everything, we would have had rotting wood under our new roof. They were very professional and gave a fair quote.
StarStarStarStarStar
We just had Gutter Helmet installed on our gutters and couldn't be happier. They provided us with useful information about Gutter Helmet and cleaned up everything, leaving no mess behind. We definitely recommend Gutter Helmet to anyone considering this product.
StarStarStarStarStar

Anniversary SALE $380 OFF

We work hard with each manufacturer to offer our customers the best promotions monthly.

Find a Location

Serving a Location Near You

  1. Baltimore, MD

    1121 Benfield Blvd S
    Millersville, MD 21108
    888-543-5638
  2. Philadelphia

    109 Gaither Dr #305
    Mt Laurel, NJ 08054
    877-281-7233
  3. Long Island, NY

    1395 Lakeland Ave #25
    Bohemia, NY 11716
    888-543-5638
  4. Pittsburgh PA

    401 Plum Industrial Park
    Pittsburgh, PA 15239
    888-543-5638
  5. Cleveland OH

    8059 Lewis Rd #305
    Berea, OH 44017
    888-543-5638
  6. Columbus OH

    690 Lakeview Plaza Blvd
    Worthington, OH 43085
    888-543-5638
  7. St Louis MO / Illinois

    3319 IL-162
    Granite City, IL 62040
    888-543-5638
  8. Kansas City MO

    1339 NW Main St Lees Summit
    MO 64086,
    888-543-5638
  9. Portland OR

    8900 SW Burnham St
    Tigard, OR 97223
    888-543-5638
  10. Seattle WA

    12830 Interurban Ave S
    Tukwila, WA 98168
    888-543-5638
  11. Tacoma, WA

    12830 Interurban Ave S
    Tukwila, WA 98168
    888-543-5638
  12. Northern Virginia

    1121 Benfield Blvd
    Millersville, MD
    888-543-5638
  13. New Jersey

    109 Gaither Dr #305
    Mt Laurel, NJ 08054
    877-281-7233
  14. Delaware

    109 Gaither Dr
    Mt Laurel, NJ 08054
    877-281-7233
  15. Northern New Jersey

    109 Gaither Dr #305
    Mt Laurel, NJ 08054
    877-281-7233
  16. West Virginia

    401 Plum Industrial Park
    Pittsburgh, PA 15239
    888-543-5638
Careers

Join the Harry Helmet Family

We're seeking fun, outgoing, and confident individuals who enjoy winning to join our team. Harry Helmet is an equal opportunity employer and we operate a safety first & drug-free workplace focused on employee safety. Great pay and benefits, apply today!