On 2020-09-13 by Scott. For homes built in the Northern Hemisphere (i.e. That’s why there can be widely differing architectural styles for homes, depending on where you are in the country. Most shingle manufacturers recommend a 1/4 to 3/8 inch overhang over your eave, which is where your roof ends by your gutter. They are essentially mini-roofs designed to protect each storey of the home individually. In the second case, the overhang does not provide enough protection. You can immediately see why this makes sense. This article will go over why overhang is so important and how much overhang shingles should have to dry properly. There are several facts to know when installing a leaf gutter guard and how the system will interact with or impact the edge of your shingles. The content of this field is kept private and will not be shown publicly. - roof overhang (5/21/2005) within the Gutters discussion of the residential metal roofing forum To create a cantilever properly, you will need to know plenty about physics – like torque and rotational equilibrium. The construction of a roof overhang is one important way that homeowners can protect the exterior of their home and preserve its value. Finally, a large enough roof overhang is a great way to stay dry and provide enough room for opening up an umbrella when entering and exiting a home during inclement weather! Now, with the new roof on, I have trouble getting my hand in the gutter. This is an archived question from the Answers forum. Here, you will need to pay more attention to how any rain runs off the roof. We’ve seen other references that suggest extending the shingles a bit more than the manufacturers suggest to compensate for wavy eaves, but they do not indicate extending more than 1 inch over the eave. The back edge of the gutter should tuck up behind the dripedge if you have it, otherwise the edge of the shingles should extend well over the back half of the gutter so the drips cannot get behind it and rot the fascia board. You can add 3 ½ to 5 ½ inches to the top. The Angie’s List Answers forum ran from 2010 to 2020 and provided a trusted space for homeowners to ask home improvement questions and receive answers directly from Pros and other users. An overhang must extend at least 3 ⁄ 4 in (1.9 cm) past a roof’s edge to reach the gutter. It is also an issue with metal roof overhang. Moreover, how far should roof overhang gutters? If you tour suburban neighborhoods with older homes, you can often see examples of housing exteriors where panels appear to be coming off the house. They extend too far. If you have installed a drip edge flashing, you should have between half an inch and three-quarters of an inch of shingle overhang. The brackets typically hold the gutter about 1/2-1 inch away from the fascia board if U-type brackets, otherwise if screw-through type the gutter might be almost up to the fascia board. This is particularly true in geographical regions where high winds are a common issue. Metal is usually installed on rafters or "strip sheathing" rather than the solid decking used under other materials. Windows, doors and siding will be coated with rain water and that can increase the opportunity for leaks. You can add 3 ½ to 5 ½ inches to the top. Starter shingles installed incorrectly (or not at all). FAQ | Or what about homes with flat or metal roofs? There are two common problems encountered with roof overhangs: In the first case, the overhang is simply too big for the home. I read that the start of a gutter needs to be low enough that if you took a level and laid it on the roof it should clear the front edge of the gutter. In extreme versions, they appear to create the prow of a ship, and are thus known also as “prow overhangs.”. Without gutters, water cascading over the roof’s edge can wash down the side of your home, especially in a windy rain event. Ideas on gutter metal weights ,and hanging tips on my blogs, Jim Casper Gutter Cover and Gutter Contractor in Ia & Nebr. Looking right down the line of the guttering, the gap between the end of the last roof tile and the outer edge of the guttering varies from around an inch and half to, in some cases millimetres. Knowledgeable roofers will install shingles at just the right overhang for your roof type. A normal gutter will have about 1/2-3/4 of its width sticking out beyond the shingles to catch the runoff. About 1 inch, just enough to assure the water goes into the gutter and not behind it. You would have to look at the cause, because usually it would be the same stickout all along because the brackets are all the same. Eaves form the overhang to distribute water clear of the walls. Home architects have a number of different options when they are looking to protect doors, entryways and windows: If the home only has one level, the standard roof design strategy is clear: make the main roof wide enough to protect all windows and doors. There is also one more problem to take into consideration: wind. In a worst case scenario, all of the exterior damage from the rain and splashback will lead to premature siding rot. California Privacy. In a hot, sunny climate, you want to maximize the amount of shading; in a cold climate, you want to minimize the amount of shading. Answered by jccasper: We usually run a gutter 1 or 2" beyond the fascia. In the Northern Hemisphere, north windows do not receive much sun, and are not a typical issue. I didn’t have this problem before. How Many Linear Feet of Gutter Would be Required for a 2900 sq. An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building. A typical metal roof overhang may be 2 to 4 inches, or even less. For the south side of the home, you should follow basic solar design principles. A cantilever is a rigid structural element anchored only at one end to a vertical support from which it is protruding. Should drip edge extend into gutter? Typically, a porch overhang should be at least 12-inches long. Terms of Use | Now you can collect the rainwater (e.g. The edge of the shingles should hang over the edge of the roof between an inch and an inch and a half — or between a half inch and three-quarters of an inch if drip edge flashing is installed (and in most cases, it should be). Greater overhang becomes a point of leverage for gusts of wind to rip off your roofing. On the cheaper end, you could go with vinyl gutters at an average cost of $3 to $6 per linear foot. The roof overhang length must be properly engineered to resist wind uplift. I note that was an easier job than yours because that building sports no gutters, just a nice 24" roof overhang. Visit the Solution Center to Explore Articles. It was a complete removal of old shingles with new drip edge, freeze guard, etc. Some slight overhang is recommended, in conjunction with a drip edge flashing, to prevent water from getting under the roofing and onto underlying wood. This means that rain will tend to drip next to the foundation and perhaps enter the basement area. The tradeoff between solar heat gain and shading, How To Install Metal Roofing Over Shingles, the amount of shading that you would like for your windows and doors, the amount of rainfall in the area around your home, the balance between solar heat gain and shading you desire, Reduce the amount of rain that hits the exterior of the home, Provide protection for doors and entryway, Protect the foundation from excess water runoff, Help to regulate the temperature of the home, The roof overhang does not extend far enough, They can make the overhang of the main roof wide enough to protect them, They can attach a smaller roof to the wall above every door or window, They can create a recessed entry, in which doors are set back from the exterior plane of the wall. All comments are subject to review and approval prior to posting. However, they can range from two feet to very minimal in length depending on the area’s climate, so be sure to account for the amount of rainfall you might expect. This is an obvious sign that there is something wrong with the dimensions of the roof overhang framing. For roofs from 50 to 100 m², the recommended dimensions will be slightly different – 125 and 87 mm, respectively. A cricket is a ridged structure that is shaped to divert water on a roof around the high side of a chimney, or any part of the roof where there are multiple levels. In designing the overhanging part of a roof, you will need to keep in mind certain key features: In general, roof overhangs offer an effective solution for how to protect windows, doors and entryways. The bottom tile or slate of the roof covering should project at least half way into the gutter - the ideal distance is between half way and two thirds of the way over. Obviously the roof sheets do need to extend beyond the roof line slightly so that the water runs into the gutter but in some places the sheets come down so close to the outter face of the gutter that i cannot even get my fingers into the gap. Should look like this -. Any Reviews on Leaf Filter Gutter Protection? In our local area (Metro Jackson, MS) the typical overhang is about 12″. Using a cantilever means you don’t need external bracing. Enter a zip below and get matched to top-rated pros near you. In other cases, there are other architectural flourishes directly under the length of the eaves. To create a cantilever properly, you will need to know plenty about physics – like torque and rotational equilibrium. All Rights Reserved. Obviously, the easiest and most effective roof strategy is simply to build a roof that is wide enough to provide protection. In America, for example, low-slung homes in the hot Western desert areas will have very different appearances than the stately mansions and homes in the colder New England area. It also means that it will be more difficult to reduce splashback. How much overhang should there be on a metal roof? However, there is also an architectural purpose to them. Thus far, we’ve primarily considered roof overhangs from the perspective of single-storey homes. The peak of the roof is a long way from the base of the wall, so these overhangs are less effective, in general, than traditional eave overhangs in protecting the home. This keeps water moving away from your roof. Guest User: "how much should roof overhang for gutter installation?" However, there are more options if the home has multiple stories, or if the roof has different slopes and angles. Roof overhangs might look relatively routine, but there is a lot of design thinking that goes into creating the optimal dimensions for each one. In the Italianate style of architecture, for example, eaves are decorated with decorative support brackets that appear to be holding up the roof. For large houses, the roof area of ​​which exceeds 100 m², gutters and pipes less than 150 and 100 mm in diameter simply can not cope with the task. I’m not a roof expert, but I knew my old roof well. Author has 1.3K answers and 308.1K answer views. Wide overhangs will protect your home’s exterior wall better than a short overhang or no overhang at all. Privacy Policy | That is their functional purpose. Or what if your property has a shed? Repair a leak in a basically sound gutter easily by covering the damaged area with roof-and-gutter repair tape (available at home centers and hardware stores). It also means that there is not enough shading for the windows. This will keep rain away from your shed. The reason for this is that whenever rain runs down any type of roof, when it gets to the lower edge it clings to the tile or slate by capilliary action - this means that the water actually runs around the bottom edge and slightlly back up the rear of the tile … In a water butt) or drain it to the garden. The back edge of the gutter should tuck up behind the dripedge if you have it, otherwise the edge of the shingles should extend well over the back half of the gutter so the drips cannot get behind it and rot the fascia board. If there is more than a 2 inch overhang , we use a special hanger called a Vampire Hanger. These guidelines are useful in the construction of any gable, or any cantilevered or flat roof. Unless the roof edge is quite uneven - some shingles overhang significantly more than others - it should have the same stickout all along. If gutters are installed in eaves, the eaves should flash so that they overhang from the gutter’s edge by about 1 2 inches. In hot climates, the general rule of thumb is to lengthen and extend the overhang. It can be made of metal. If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half. 3: The panels at the eave side of the roof should overhang into the gutters 1 to 1-1/2 inches. Angie's List Call Center, © 1995-2020, Angie's List. Shingle Overhang Often Has to Be Addressed. They also help to frame windows on upper stories. Get free estimates from gutter installers near you. Contact Us | Cantilevered structures are popular for homes with balconies. Drier climates require minimal overhang length and wetter climates require longer overhangs. This situation where the overhang does not provide enough protection is especially common with more modernist architectural styles, where the emphasis is on producing either sleek, curved buildings or boxy, highly angular buildings. In short, that means that the roof overhang should be of sufficient dimensions to optimize the amount of shade during the warm summer months, but not be so large that they do not allow full sun exposure during the cold winter months. I’ve cleaned the gutters out 4 or 5 times since I bought the house a year ago. Homes with sheds can have these problems, too. We recommend 50mm overhang into a standard gutter. Your shed/ summer house, porch, overhang or other small building with a sloping shed roof only requires guttering on the lowest roof edge. Shingles extending off your roof deck (the plywood, OSB or wood tongue and groove over your rafters) and ice barrier or felt should extend over a metal drip edge, roof apron or flashing. They are essential for framing and shading windows, reducing splashback, and getting rain to fall far enough away from the foundation. For a typical home with 150 to 200 feet of gutters, you can expect to pay around $600 to $1,600 for installation. The typical roof overhang serves six basic purposes: If there are improperly sized overhangs, then a home will tend to overheat in the summer and it will be at particular risk of water entry to doors and windows. You can think of this logically – there is simply much more potential for rain splashback, especially in very windy conditions. This will keep rain away from your shed. You want to make sure that any water is landing far enough way from the foundation, as well as from the doors of the home. No stickout means the water coming off the roof, especially in heavy rains when it is cascading off the roof rather than dripping, will totally miss the gutter and go straight off onto the ground. Answered by LCD: I am assuming here this is a typical gutter - underslung off the fascia board under the lip of the roof, not one of the ones that is embedded into the roof surface at its edge, which do not protrude from the edge at all. If the roof overhang is not big enough, then the only way to protect these windows, doors and entryways is by recessing them into the thick exterior wall, or by installing special casing and flashing for each door or entryway. 3: The panels at the eave side of the roof should overhang into the gutters 1 to 1-1/2 inches. If rainfall is constantly allowed to splash up against the siding of the home, this could lead to premature siding rot. How much overhang should a tin roof have? The sheets should overlap at least four inches, add a bead of the seal where it overlaps, and at the other end of the building, make sure there is a 2-inch overhang. That’s not just an architectural eyesore – it could also require very expensive repairs. Are Rainhandler Gutter Systems a Good Investment? Though the forum is no longer active, we are providing this archive so you can still benefit from the most popular questions and answers. If you have gutters but still suffer from water rolling down the sides of your home, it’s likely that your overhang isn’t long enough. A cantilever roof overhang is one way to really give a really distinctive look to your home. The goal is to balance the amount of solar heat gain and amount of shading. It can be made of metal. However, if they got the back lip of it in front of the dripedge, or walked up onto a top wood dripedge trim piece on the top of the fascia, then it could have varying stickout because it is not back to or almost to (because of the bracket thickness) the fascia board, which would not be right. A brow roof is a narrow roof attached to the wall at the level of the first-floor ceiling. For a standard gutter installation using our heavy duty hidden hanger, the metal roof overhang needs to be between 1 1/2 and 2 inches so the rain will flow into the gutters properly. Gable-end overhangs (also known as “rake overhangs”) extend all the way to the peak of the roof. A shed overhang is an easy and effective way to protect your shed. There are actually mathematical rules and architectural guidelines that can help you determine the optimal roof dimensions. Prepare the gutter by scraping out as much old tar or caulk as possible. Kind of hard to explain, but if you extend the roof down 3" (assuming this gives you the clearance you need for the siding), then you would attach the 2x on edge to the wall and cut the other edge to the proper angle to support the roof sheathing and enclose the space. your shed, porch or overhang. If you look at many buildings, you’ll immediately see them – they appear to be gently sloping “bulges” that surrounding protruding parts of the roof such as the chimney. My understanding is then a 1/16" per inch pitch is standard.. If installing metal on a non gutter application you can overhang the panel up to 3 inches. And the more splashback there is, the greater the potential is for siding rot. How wide is your roof overhang (how far does the roof overhang the siding/brick)? America and Canada), the most important windows and doors to keep in mind for any roof strategy are the south windows. 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