Simple Solutions

How to Install a Rain Diverter

By: Joe Truini
Installing a sheet metal rain diverter on a roof.

Installing a sheet metal rain diverter on a roof.

Gutters are a common way to handle rain running off a roof, but if your house doesn’t have gutters, you can still keep rainwater away from doors by installing a rain diverter.

A rain diverter is a specially made piece of metal flashing available at home improvement centers that is used to divert rainwater away from a doorway. This not only keeps you from getting wet but prevents the door from deteriorating as well.

To install a rain diverter on your roof:

  1. Start by cutting the flashing with tin snips about 2-3 feet longer than the doorway you want to protect.
  2. Next, carefully break the seal on a row of shingles above the doorway with a flat pry bar or putty knife.
  3. Slide the diverter under the row of loosened shingles.
  4. Tilt the rain diverter in the direction you would like the water to flow by angling one side down slightly.
  5. Lift the shingles up and tack the rain diverter down in several places using roofing nails.
  6. Finish up by putting a dab of roofing cement on each nail head to seal out water and help hold the shingles down.

Further Information


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13 Comments on “How to Install a Rain Diverter”

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  • Official Comment:

    Thomas Boni Says:
    July 24th, 2019 at 10:21 am

    Hi, Will,
    Thanks for writing to us. It looks like there are some AutoCorrect issues, so it’s a little hard to follow along.
    Please re-send the question. 🙂

  • Will Dowdy Says:
    July 19th, 2019 at 6:35 am

    I added hallway off the edge of roof to add another room, the roof is covered with a metal roof tin nut hallway still leaks off eve inside. The eve cannot be removed. How to stop the water?

  • Nalini Says:
    April 24th, 2019 at 11:05 am

    I have a basement back porch covered roof made with wood blocks. I want to use the basement back porch. Do I need to replace the wood block roof to avoid rain water flowing through or is there any solution to use to avoid rain water?

  • KILO Says:
    November 26th, 2017 at 11:05 am

    I have a valley in my roof which is directly over my front door. When it rains, it’s like a waterfall, impacting near the door itself, splashing on the bottom half of the door & causing the base of my front door to rot (needs to be changed). How do I install a rain diverter across this valley with half on each side of the valley to include the valley itself?

  • Bettye Riddle Says:
    May 22nd, 2017 at 10:34 am

    I have a metal roof and when it rains it floods my patio. How do I fix it?

  • Antonio Says:
    November 12th, 2016 at 6:57 pm

    You make it looks so smooth and easy. But my roof shingles don;t nicely and flexibly peel up so I can nail the diverter don underneath them. They are stiff and although I have “carefully” broken the seal, if I pull them up, they are too brittle and seem like they’re going to break before I can hammer the nail. What do I do?

  • daniel Says:
    July 27th, 2016 at 9:36 pm

    Watching this video, I see a major flaw… Although a light drizzle of rain wouldn’t have an effect, anything else would backup above and under the section of tile, soaking the roof wood and destroying the roof. The diverter MUST extend from the roof, not be attached to the tiled area, to avoid water backing up and damaging the roof, even if the diverter is angled slightly (as it should be).

    April 26th, 2016 at 7:33 am



  • george Says:
    September 15th, 2015 at 1:06 pm

    I have a patio roof with 2 downspouts, one on each end. when it rains hard in FL, 90% of water comes out of only one downspout, very little if any comes out the other one. My question is can I block off one that takes 90% to force the water to go to the other side. I think the roof is pitched more in one direction. The 90% side runs back to patio flooding that side. I put a 6-foot downspout to run further out, but it drains back. not a pretty sight. thanks for any help.

  • Larry Says:
    June 1st, 2015 at 10:04 pm

    I tried to find the Rain Diverter at Home Depot, Lowes and two Ace Hardware stores. Home Depot did not have it near me. They had it closer to my parents home up in New England.

    However, I went to the Home Depot near me and found that they sold a Roof Edge Flashing that when turned over is exactly what I needed to use as a rain diverter and each 10′ piece cost less than $5. Here is the information on the piece I used from HD:

    Amerimax Home Products Model # 5500300120 Internet # 100032162 Store SKU # 625815
    B5 1/2 Aluminum Drip Edge
    $4.97 / each

  • Official Comment:

    Ben Erickson Says:
    June 18th, 2010 at 10:59 am

    Hi Earl,
    You can send a picture of your diverter to

  • E Earl Says:
    June 18th, 2010 at 7:07 am

    May I send you a picture of a “diaverter” that was applied to my new guttering? I am no t pleased with the looks of it. Your input is appreciated.

  • steve Says:
    February 21st, 2009 at 4:13 pm

    thats a ice dam waiting to happen use a short gutter (dont use spikes use the screw in gutter hangers)

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How to Install a Rain Diverter