The Best Rain Gutters for Metal Roofs

Half-round and K-style gutters are the best options for metal roofs.
Written by Talullah Blanco
Reviewed by Melanie Reiff
You can install any rain gutter system on a metal roof, but half-round style gutters and K-style gutters are usually your best options. 
Metal roofs are growing in popularity across the United States because they are water-resistant and more durable than traditional asphalt shingle roofing. If you have a metal roof, you should consider installing a rain gutter system to protect the rest of your home from water damage. 
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Why do metal roofs need rain gutters? 

Your metal roof protects your roofing system from moisture, but without a rain gutter system attached, the rest of your home is vulnerable to water damage
Rain gutters and downspouts divert water away from the foundation of your home to prevent soil erosion, damage to your siding, and leaks into your basement.
MORE: Does home insurance cover flooded basements?

The best style of rain gutters for metal roofs

Rain gutters are available in a variety of styles, sizes, and materials, including vinyl, aluminum, galvanized steel, and copper. 
Aluminum gutters are the most popular choice among homeowners because they are lightweight, durable, and reasonably priced. 
You can install any rain gutter system on a metal roof, but some styles are better suited for metal roofs than others. Here are some recommendations:

Half-round style gutters

Half-round gutters are found on historic homes and are likely the style of gutters you’ll see in older neighborhoods. These gutters resemble a tube that has been cut in half and will complement any home. 
They require special brackets to hold them in place because their rounded shape does not sit flush against the fascia boards. While half-round gutters provide effective drainage, they are prone to clogging without gutter guards in place.

K-style gutters

The profile of these gutters looks like the letter “k” when they are viewed from the side. 
K-style gutters can handle a high water capacity and are commonly installed on homes that experience lots of rain. Given their sleek design, K-style gutters are also a great choice for modern homes

How to install rain gutters on a metal roof

Installing gutters on a metal roof involves many of the same steps as installing traditional gutters
  • Start by measuring the length of your roof. Rain gutters will run the entire length, so make sure to purchase enough material. If the roof is 40 feet or more, the gutter should pitch downwards in either direction from the center.
  • Then, use a drill to fasten a fascia bracket to every other rafter tail.
  • Next, cut the gutter sections to length using a tool like a hacksaw or duckbill tin snip. If the gutter runs around a corner, cut the ends at a 45-degree angle.
  • Attach the end caps to each gutter and seal them with caulk. 
  • You’ll also need to cut holes for downspout outlets at the low end of the gutter and install outlets by fastening the rivets into the holes.
  • Mount the gutters by securing them to the fascia brackets with machine screws.
  • Finally, install the downspouts by skewing each one into the gutter outlet. Make sure the tapered end is situated to direct water away from the house. 
Hang the guttering as high on the metal roof as possible. 

How to save on home insurance

The best way to save money on your home insurance policy is by bundling it with your
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The average cost to install 200 linear feet of gutters on a one-story home can range between $1,000 and $10,000, depending on the materials you use. 
Most DIY projects using vinyl or aluminum gutters will cost $1,000 to $3,700 for a 200 linear foot installation.
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