Saturday, May 25, 2024
HomeMetalWhat Size Gutters For Metal Roof

What Size Gutters For Metal Roof

Consider Your Drainage Area

How to: Stop end a COLORBOND or ZINCALUME box gutter | Metal Roofing Online

How do you do the math to figure out how large your gutters should be?

Youll also need to look at how much water is going onto your roof and flowing into your gutters. A larger roof means that more water will move into the gutters. Dont forget to count all of those little parts of your roof if you dont have a simple roofline.

To find the drainage area of your roof, multiply the length and width of all the parts on one side of your roof and add them together to get the drainage area. This is simple if you have a straightforward roof style, but it can get more complex when your roof has many different parts.

How Far Should A Metal Roof Overhang The Gutters

Metal roofing experts say that the panels should overhang the gutters from 1 to 1.5 inches. But it depends a little on your climate, how big your roof is, the pitch of your roof and the type of metal roofing.

The gutter system on a metal roof needs to be designed to fit your climate. If you have heavy rainstorms, water may overshoot gutters that are too narrow and installed too low.

Ideally, a metal roof gutter system will be designed to handle the volume of snow or rain and the velocity of the water. The velocity of the melt water or rain depends on the pitch of your roof and the type of metal roofing.

Given all these factors, the overhang and the gutter need to be perfectly paired for your climate and your roof.

Is Bigger Always Better

The standard size for residential seamless gutters depends largely on the region of the country along with the size and style of your home. Many homeowners are upgrading to 6, 7, or even 8oversized gutters. Though a 6 gutter is only an inch bigger than a 5, it does handle 40% more water. The oversized downspout installed with these gutters can also handle more debris passing through them. We have been seeing the trend of larger gutters becoming more sought after here for several years. When we decided to add a third crew in 2011, we added a second 6 machine because we simply could not keep up with the demand for 6 gutters.

Also Check: How Wide Are Standing Seam Roof Panels

Choosing The Right Gutters

Overshooting and overflowing rain gutters result in the some of the same problems. From useless gutters that drench you and your guests to the resulting water damage from a faulty system, choosing the right gutters starts with your contractor. Choosing an expert like The Rain Gutter Specialists can make all the difference in your business or home’s investment.

Water Flow On Metal Roofing

LeafsOut 5â? WIDE, DIY Micro Mesh Rain Gutter Guard System

There is less surface tension on smooth metal roof panels, so water rushes down faster into the gutters, potentially shooting out far from the eaves. Some metal roofs will have an aggregate in the paint coating to give a rougher surface to reduce flow, but the rate of the water is still elevated. Gutters have to be able to accommodate the increased rate of flow.

Also Check: How To Attach Railing To Flat Roof Deck

Downspout & Gutter Sizing Calculator

This app allows you to easily and accurately size downspout and gutters using the methods and formulas covered in SMACNAs Architectural Sheet Metal Manual .

The Rainfall Wizard allows you to select the closet city to use the information from the ASMM tables. The Rain Intensity per ASMM Table 1-2 uses the 5-minute Duration for a 10yr or 100yr storm. Since the Rain Intensity data is constantly being updated by the National Oceanic and Atmospheric Administration , this calculator also app allows the manual entry of the Rainfall Intensity, thereby allowing you to calculate per the local authority having jurisdiction. For the most up to date rain intensity data, NOAAs website is .

Either manually enter the Design Area of the roof or use the wizard. The Design Area Wizard allows the user to select a roof shape and add dimensions to get a design area. The wizard also calculates for Vertical Walls area per International Plumbing Code

The required gutter and downspout size is dependent on the number of sections, the length of gutter sections, the number of downspouts, and the gutter width to height ratio.

Working With A Trusted Gutter Specialist

If you plan to install a new rain gutter system, its wise to work with a professional. At Stevens Roofing, we install high-quality aluminum seamless gutters and other gutter systems for residential homes throughout Norfolk, VA. Our crews are highly skilled and will help you choose the right gutter size and color to suit your homes décor. We will securely fasten your gutters and downspouts with hidden mount straps to ensure both aesthetics and durability. Contact us today to get a free estimate!

Read Also: How Much Should A Shingle Roof Cost

How Do I Stop My Gutters From Overflowing

How to Stop Overflowing Gutters

  • Clean out your gutters and downspouts.
  • Check the pitch and tilt of your gutters.
  • Install splash guards.
  • Install gutter guards.
  • Do metal roofs require larger gutters?

    Gutters are water channels that are designed to funnel water from the roof of a structure to a safe drainage area. Strictly speaking, metal roofs do not require gutters because metal roofs themselves are resistant to the damage gutters are designed to prevent.

    Does gutter Helmet work with metal roofs?

    2. What Type of Roof is Gutter Helmet® Compatible With? From asphalt to metal to clay, Gutter Helmet is compatible with every material and style of roof. We are happy to provide letters from the manufacturer verifying that our product will work with your particular style of roof.

    How To Extend A Metal Roof Overhang

    Install Corrugated Metal Roofing. EASY VIDEO Screw Placement Screw Location Overlapping Panels

    Sometimes you may have to put an extension over your metal roof overhanging. Though too much overhanging can be a difficult problem to solve, sometimes too little overhanging can cause the water to get stuck on the roof.

    This could damage the roofing. Which is why it is best to extend your overhanging manually-

    • Install a new metal drip edge along the edge of the new overhang
    • Along the lower edge, lay a course of new shingles
    • Keep working upwards with the remaining courses
    • Stop when you reach the existing shingles
    • Once you reach that point, slip the final row of new shingles beneath the old shingle tabs.

    And with these simple step you have your new extension of your existing overhang. Sometimes the existing overhang can get damaged and it is a good idea to extend that instead of getting an entire new setup.

    Make sure to be well equipped and keep the measurement right to avoid further fixing.

    Don’t Miss: How Do I Know If My Roof Is Leaking

    Does Leaffilter Work With Metal Roofs

    Steel Roofs and Gutter Guards The wide variety of LeafFilter gutter guards is an additional advantage because it matches the variety of steel roofs, more so than the shingle that often looks more like slate, asphalt or clay tiles.

    Do leaf filters work in heavy rain?

    LeafFilter: The mesh screen on LeafFilter does a decent job of keeping debris out of your gutters. During heavy downpours, this debris will block water from entering your gutters it will instead cascade over the sides of your gutters, potentially causing foundation issues and flooding.

    Choosing The Right Gutter Size

    Gutter Sizing

    Two sizes of gutters are the most popular in standard homes five-inch K-style gutters and six-inch half-round round gutters. Each of these sizes are sufficient for most houses, in most areas of the country. It should be noted, however, that houses with roofs that are large and steep, or in some areas of the country where there are large downpours of rain, wider gutters and additional downspouts may be necessary to prevent the overflowing of rainwater.

    Drainage Area Square Footage

    So what size is necessary? First, the square footage of the drainage area of the gutter needs to be determined. For a standard gabled roof, only two calculations would be required one for each slope. If your roof has multiple facets, however, the area of each surface that has a drainage area would need to be calculated in order to know the entire square footage.

    Roof-Pitch Factor

    Roof pitch Roof-pitch factorZero-in-twelve to three-in-twelve 1.0

    Maximum Rainfall Intensity

    For different regions, the maximum possible rainfall over a five-minute interval is recorded by the United States Weather Bureau. This measurement is expressed in inches per hour. For this measurement, higher numbers require a larger gutter to avoid overflow in the event of a large storm. Check this table to know the maximum rainfall intensity for your region.

    Gutter Size


    Also Check: Which Type Of Roof Is Best For Solar Panels

    Are There Alternatives To Gutters On A Metal Roof

    Gutters catch rain but other junk as well. Gutters get holes and the brackets break. Standing on ladders to clean them out can be hazardous. Sure, you can have a service do it, but thats expensive. Experts say there are several alternatives to guttering, like rain chains, drip paths, rain dispersal systems, French drains, and drip edges.

    Rain chains are beautiful but effective too. You can feed a rain chain directly into a rain barrel or cistern. Rain chains replace downspouts on traditional gutter systems or pair up rain chains with rain dispersal systems.

    Drip paths are impervious to the erosive effect of water sheeting off your roof. Drip paths are constructed of large rocks, bricks, or pavers. They are located directly below the roof edge where water runs off.

    The drip path paver or rock system is strong enough to dissipate the force of the falling water and then channel it away from the foundation.

    Rain dispersal systems divide up the water flow to non-damaging flows down to just droplets. There are a variety of DIY systems you can buy online or at your hardware store. Designed by engineers, these systems direct rainwater away from the side of the house.

    French drains are a great way to direct large volumes of water away from your house. Install a French drain at the drip line. Drip paths and French drains are a great combination.

    Heres a great reference for drip edging and flashing.

    Can Gutters Be Too Big

    Rain Gutter Ideas: From Size And Style To Material And Finishes by Adam ...

    A 6 gutter is noticeably larger than its 5 junior version. On the front of a small house, or a one-story ranch home, the larger gutter makes a strong visual statement, a statement you may not like.

    Your gutter contractor can help you determine which size works ideally for all the conditions your home faces. With the 6gutters handling 40 percent more water than 5 gutters, you also need larger downspouts to channel all the water away from your home.

    Larger, 6 gutters are a wise investment for many Cincinnati homeowners. Your best bet is to talk to a reliable, local contractor about your gutter replacement options.

    Whether you opt for 5 gutters or 6 gutters, proper installation is key. Contact us today at Titan Siding and Roofing to ensure your new gutters bring added value, beauty, and security to your Cincinnati-areas home.

    You May Like: How To Install Roofing Felt

    Commercial Box Gutter Sizes: What Size Do I Need

    When trying to decide on what commercial gutters you need it is important to realize that the size of the gutters can affect how well they work for you. Storm Master Gutters has 3 box gutter sizes to offer you, the 6, 7, and 8-inch.

    Each size can hold more water than the last, but if you pick one that is too large, you risk water pooling in the rain system and causing problems.

    Here is what you need to know!

    Maximum Metal Roof Overhang Without Support:

    The overhang of a metal roof should never be more than 4 inches, even without support.

    Metal roofs are heavy and have a risk of weight. So it is best to keep their maximum overhang less than 4 inches. In case of gutters do not cross more than 1.5 inches.

    With metal roofs you have to be very careful. There should not be too much overhang in the roof. Around 2 to 4 inches is fine for the standard metal roof.

    However, this size varies when it comes to gutter panels. Make sure to not cross the maximum and minimum size requirements for safety issues.

    Recommended Reading: How Much Would A Tin Roof Cost

    Other Important Points For Metal Roof Gutters

    • Considering the cost of the metal roof is also important. Vinyl is the most inexpensive option for you but might not be durable enough. So, choose according to your requirements.
    • Opt for a seamless gutter design that avoids water escaping through the gaps.
    • Choosing a seamless aluminum product with gutter protection is better if you want to avoid maintenance.
    • Choose the pitch wisely. A steep slope is better for constant water flow.

    Can You Put Gutters On Metal Roofs

    How to: Downpipe Pop into Quad Gutter | Metal Roofing Online

    Do You Need Gutters with a Metal Roof? Your metal roof will probably survive without a properly installed gutter system. Unlike asphalt shingles, which can crack and allow moisture to penetrate into your roofing system, metal roofs are designed to be water resistant.

    do not require gutters

    Read Also: Do You Need A Permit For Roofing

    When To Choose 7 Inch Gutters

    All tile and metal roofs should have a minimum size of 6 inch gutters. In some cases where the tile is set very high above the roof line, water will shoot out further. In this situation, a 7 inch gutter is needed. 7 inch gutters are also needed if the roof is HUGE. The larger the roof, the more that rainwater will cascade off and a bigger gutter will be needed for water holding capacity. Some properties have very few places to install a downspout due to the architectural design, and using 7 inch gutters will ensure your system can handle the water that flows off your roof. To make sure your gutter systems are the most effective, the bigger the gutter the better protected your property will be.

    Do I Need Gutters All Around My House

    Unless your roof slopes in all directions, you probably won’t need gutters installed around the perimeter of your home. You will need gutters installed at the bottom of any slope. … It is important for gutters to fit into your household budget and accomplish the task they were designed to do.Jul 14, 2020


    Also Check: How To Stop A Flat Roof From Leaking

    Is A 4 Overhang Too Much For A Metal Roof

    As an overhang for a metal roof, 4 inches is not too much. But anything more than that is not recommended.

    Usually an overhang should not be more than 4 inches for a metal roof. It is so the roof does not get too heavy. And it is always recommended to keep the overhang as little as possible.

    Overhang is important for any roof to let the water not sit on the roof. So it is best to keep a very minimum measurement of overhang. Metal roofs can be very heavy so it is best to keep the overhang less than 4 inches.

    Removing Or Keeping The Existing Roof

    4 Types of Gutter Systems

    After setting up the site, you will be faced with a decision: removing the existing roofing or laying the metal panels over it.

    We recommend removing the existing roof. Take great care to avoid rushing through this task as it is pretty risky. Protruding nails dropped tiles, and the ever-present risk of falling are just some of the things to worry about here. You can either dump the tiles in the trash cans or store them for future use elsewhere.

    Ensure you remove your roof on a dry day. A roofless building is highly susceptible to water damage.

    Removing the roof also allows you to change or adjust your gutters so they can be compatible with the new roof panels. You should also repair underlying wood sheathings, air vents, and insulation before laying the new roof.

    We recommend you add a new insulation layer and a breathable membrane. This layer will protect the wood sheathings in case any water gets beyond the roof panels. The insulation should be secured with a staple gun or nails.

    Also Check: How To Get Rid Of Iguanas On Roof

    When I Should Put Gutters On A Metal Roof

    Gutters are not perfect. If a gutter is installed irresponsibly or not maintained, it can fail to protect a structure in the way it is intended to. But gutters offer protection that can save your building from severe damage.

    Overall, it seems that responsible home and building owners should fit their property with a well-installed gutter system. It is important to recognize that there are a variety of different gutter systems designed for particular building and weather conditions. Therefore, it is best to contact a roofing professional to help you determine what type of gutter best suits your situation.

    Types Of Gutters For Homes In South Florida

    Here in South Florida, the most common choice for a gutter system is a 6 inch seamless gutter. 5 inch gutters may work fine on smaller shingle roof homes with adequate downspouts, but with the typical Florida home a 6 inch gutter is key especially with the torrential downpours we have here. We also have less pitch on our roofs which causes the water to shoot out at more of an angle. That extra inch in your gutter system makes a big difference in effectively controlling the flow of rainwater.

    You May Like: When Is It Too Hot To Shingle A Roof


    Most Popular