Section off your roof and write your calculations down as shown below (Dotted Lines). And then I will count the # of rows of shingles between the gutter and the peak of the roof and then divide the number by 2, which gives me the height measurement. Rounding before you begin multiplying and adding may throw off the accuracy of your final estimate. On your next roofing estimate, I suggest that you compare the total square footage number you get by actually measuring a roof to the number you end up with after using these 2 little calculations. Did I mention that it is highly accurate, as well? To sum it up, each individual tab on a 3-tab shingle measures approximately 12″ wide by 6″ high. The roof pitch is measured by how much the roof … Include your email address to get a message when this question is answered. If you’re using a 2 ft (0.61 m) level, divide the distance between the level and the roof by 2 to get the true pitch. This has shed a light on my getting great pictures and how to accurately measure the roof from the ground. No. The pitch of a roof, or roof slope, helps determine how quickly excess water, snowfall, or debris will fall off of the roof. If a section is 120 feet (37 m) x 100 feet (30 m), its total square footage would be 12,000 square feet (1,100 m. Be sure to find the area of any dormers on your roof, as well. If your roof measures 48 feet (15 m) x 24 feet (7.3 m), multiplying its length by its width would give you a square footage of 1,152 square feet (107.0 m. Always order 10% more materials than you think you need to account for waste, and round up to make sure you don't come up short. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. There is a right way. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/17\/Measure-a-Roof-Step-12-Version-2.jpg\/v4-460px-Measure-a-Roof-Step-12-Version-2.jpg","bigUrl":"\/images\/thumb\/1\/17\/Measure-a-Roof-Step-12-Version-2.jpg\/aid1152657-v4-728px-Measure-a-Roof-Step-12-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

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\n<\/p><\/div>"}. Next, use the pitch to look up the pitch multiplier for the roof online. Home. This article will walk you through each process step-by-step. As you can see, measuring a roof for shingles is not as daunting a task as many people would have you believe. It is also easy to calculate the roof angle by taking the inverse tangent of b divided by a. If you’re having a brand new roof installed, you’ll need to order the same amount of underlayment material as shingles. That way, you’ll be able to make corrections and revisions as needed while you work. Alternatively, you can purchase a measuring wheel from your local hardware store. For example if your roof was 1900ft2, then you would have 19 squares and need 57 bundles of shingles to cover it. Estimating the area from ground level is less precise than measuring each side individually, but it can make a quick, easy, and safe alternative when redoing a square or rectangular roof. You’re just looking for the outer perimeter at this stage. Hips and top ridge: Visually count how many ridge pieces are on your roof. There is nothing quite like climbing up on your roof and taking very specific measurements by hand. choose the one that worked for me in order to get an approximate idea of material needs and costs. The formula is Edge+Peak (top and bottom) divided by 2 times the height. How to Take Roof Ground Measurements. Last Updated: January 13, 2021 I hope you find this info to be as time-saving and helpful as I have. This nominal square footage amount is then multiplied by a factor associated with the roof’s pitch. Have a helper hold the bottom of the ladder while you work from it to measure the roof. Three bundles of shingles will cover a single square. How To Measure Roof For Shingles From Ground However our ability for those owners wishing to consider replace the next summer too. By signing up you are agreeing to receive emails according to our privacy policy. How To Measure A Roof From The GroundIn roofing sales, you'll sometimes need to get quick roof measurements to help you ballpark costs on an estimate. To measure an irregularly-shaped roof, you'll need to get on top. I was able to, "The clear and easy-to-understand sample and diagram layout was helpful. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. They're ordinarily roofed separately. If you have a roof section that's 30 feet (9.1 m) long and 12 feet (3.7 m) high, multiplying those dimensions would give you an area of 180 square feet (17 m. Measure and mark the square footage of each triangular section carefully, as these tend to differ in size. Three bundles of shingles make a square of shingles. Next step, you need to measure the pitch (also known as the slope) of the roof deck. Then, add 10% to the number to account for waste. Please don’t blindly use these methods without testing them out first. All that matters is that you have a visual aid to keep up with the various dimensions you’ll be using to make your final calculations. Record these measurements in your notebook. Complete one side at a time before moving on to other areas. Been doing the count method 20 years , works great.I do measure width and length with tape.Always nail it spot on. I should mention that I use a Canon digital camera that has a 10x “optical” zoom along with a 40x “digital” zoom (not really sure what the hell that means exactly) but it allows me to zoom in really close to get great photos of the flashing as well as the condition of the current roofing materials. I typically begin by counting the # of shingles from left to right, which gives me the total width of the section (in feet). I typically begin by counting the # of shingles from left to right, which gives me the total width of the section (in feet). Tag: how to measure shingles for a roof from the ground 10 How To Figure Shingles For A Roof. Climb onto your roof and measure each section by its height and width. However, the good news is that you can achieve the same results with just a basic knowledge of geometry. Determine the Roof Pitch. On 25th December 2020 By . Find the length and width of the building’s exterior walls. Since these triangular sections are only a small percentage of the entire roof, I just use the resulting number even though it is slightly larger than the actual. However, because walking on a roof and measuring can be difficult, it can be a dangerous job for people who are inexperienced. It is a super-simple way to quickly and safely measure the size of just about any style of asphalt shingle roof. Record the measurements on your sketch of the roof. The … unlocking this expert answer. Instructional: 3 D Animation, showing you how to measure your roof. Reshingling a roof is a complex and expensive project, one that’s usually best left to the professionals. If you have a hip roof, it's a little harder, but not much. If you are not the owner of a residential roofing company then you most likely haven’t heard of this before. The terms “pitch” and “slope” are sometimes used interchangeably when describing roofing projects. As the old handyman's adage says, always measure twice to ensure that you end up with accurate dimensions. To learn how to measure a roof by making a diagram, keep reading! To be sure these measurements are accurate, you might want to measure the width of your driveway with an actual tape measure and compare it to what Google Earth tells you its distance is. Yes, as long as there is only one layer on the house already. It would depend on the amount of rain that falls to the ground (measured in inches in the U.S) when it rains, air temperature and wind. After you’ve done this, you can click along the outer edge of the roof that you wish to calculate the area for. 2020. Note that if your roof has a low slope (below 3 pitch) asphalt shingles are … In this context, a “plane” is defined as each flat, continuous section of the roof. And then I will count the # of rows of shingles between the gutter and the peak of the roof and then divide the number by 2, which gives me the height measurement. Medium Low Slope - Roof Pitch of 3 or 4. David Bitan is a roofing professional, licensed contractor, and the owner and founder of Bumble Roofing based in Southern California. How much does it cost to shingle a roof by square footage? Measure your house at ground level, then add in the roof’s overhang for greater accuracy. How much overhang should there be on the sides and ends? How much total wood and nails are in my roof if the roof is 400 sqm? Multiple the number of shingles times the width of each shingle (which you can measure at ground level) to get ‘b’ in the figure below. (Roofing is measured in squares, one square is equal to 100 square feet, a pack of shingles is 1/3 square or 33 sf.) You or your roofing contractor will work around these areas once the project is actually underway. I have done it this way before, but the only issue with this method is that shingles generally have 5 inches revealed instead of 6 inches. Either way, we've got you covered! There are 22 shingles in a bundle for 3-tab. Then I simply multiply the two numbers together and the result is the total square feet of this particular section. "The article gave me 3 different methods to figure my calculations, and one way to figure roof pitch. Multiply the pieces by inches based on exposure, then divide by feet. How many bundles of three-tab equals one square? Add all your measurements together to get your total square footage. There are 25 references cited in this article, which can be found at the bottom of the page. eg: Exposure comp shingles 5.5″, shake 10″, tile 13.5″-14″. A 14 in (36 cm) difference, for example, indicates a pitch of 7 in (18 cm). This time, you'll break your roof into trapezoids and triangles. Dormers are separate protruding structures that house windows in the upper floors of the house. Don’t round your roof measurements up or down. When I encounter any triangular-shaped roof sections such as dormers, I basically count the shingles from side to side where ever it is the widest and then count the shingles from the gutter to the peak, while remembering that each shingle is approx 12″ wide x 6″ high. Pitch is expressed as “X-in-12 (inches)”. With over 60 years of combined experience, Bumble Roofing provides easy, friendly services to structures including residential, commercial, industrial, multi-family, and government buildings along with hospitals, hotels, and churches. Measure out from the face of the wall below the fascia or rafter tails to a point that aligns with the outer edge of the roof. There’s no need to account for chimneys, pipes, or other irregularities. It’s a good idea to add an extra 10% to your estimated material requirements to account for waste and ensure that you have enough shingles to cover your roof when it’s all said and done. Add these figures to your recorded measurements to account for the additional area. In the United States, a run of 12 inches (1 foot) is used, and pitch is measured as the rise of the roof over 12 inches. Then calculate the line length of the roof (‘c’ in the figure) using the Pythagorean Theorem; c = square root (a squared + b squared). 14 July 2020. You should be able to pull up a number of reliable pitch multiplier tables with a quick Internet search. This article has been viewed 326,082 times. So, for a roof with a total square footage of 4,200 square feet, you’ll need 42 squares of shingle material. For example, you will need to figure out the exact number of shingles required to cover the entire roof area. % of people told us that this article helped them. When using this second calculation, the total square footage number you end up with may be a little higher than the what is actually there. An important part of any roofing repair or replacement project is being able to accurately calculate the quantity of roofing materials required to finish the job. Along with the roof’s pitch, you’ll use these 2 dimensions to calculate the roof’s overall square footage. There is not a single cost. Then each measurement is recorded on the diagram, applicable to that roof surface. Save my name and email in this browser for the next time I comment. Once you've measured the building’s walls, estimate the length of the overhangs on either side (if your roof has them). This will be done once it’s time to determine the number of shingles you need. How to measure a roof In the sample below you will have 5 different calculations and that should match the number of sections you wrote down, when you started. For Hip Roofs, I measure the length of the house and then I measure the width. Did you know you can read expert answers for this article? Roof measurements are then used to quote any roofing job and completely eliminate the need to re-measure. Ridges and valleys are the top and bottom contours where smaller hip sections join the main part of the roof. This article has been viewed 326,082 times. a how to measure a roof for shingles from the ground new roofing isn’t supposition to the oil. With over 12 years of construction industry experience, David specializes in restoring, repairing, and maintaining residential, commercial, and industrial roofs. The first technique is referred to as the “Shingle Count” Method, which is used for estimating the measurements of all rectangular-shaped sections of a roof. Regardless of which brand of camera you use, I have found that the most important feature is the “size of the zoom” because it allows you to take great photos of just about any roof while standing on the ground. What I’m about to share with you is one of the best kept secrets for measuring residential roofing jobs without your feet leaving the ground. Roofing Contractor & Maintenance Professional. wikiHow is where trusted research and expert knowledge come together. Calculate the minimum roof slope for shingles and learning the important reasons why the slope is important component. Pull up an online roofing calculator if you need help finding the area of irregularly-shaped roof sections (or you just want to double-check your work).

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