The final measurement for the calculation will be a length of 26 feet by 20 foot 6 inches wide. Calculate the cost of the most popular metal roofs: - standing seam, - corrugated R-panels, - steel or aluminum shingles/shakes, - … Corrugated metal is 36 inches wide. Determine Cuts. It’s going to take you a couple of hours to do all of this research. After they take the measurements, they can provide you with an estimate as to how much it is going to cost. 10’/2 = 5′so the run of the valleys is 5 linear feet. If the eave overhang is 12 inches deep, multiply the roof-line measurement determined in Step 1 by 4. This is certainly not something that you should do on your own. Thus, a moderate “6 in 12” roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Roof Online's Quick Reference Library - Click Here! If the pitch of the roof is not that steep, you won’t have to worry too much about following. If you want to install a metal roof on your home, there are measurements that you will have to take. Divide the width by 2 and you have the run of the valleys. Roof valleys are like gutters with a steep pitch, but the stakes are higher for valleys than they are for gutters. Place the square against the rib of the panel that we have installed last and move it up until 17 intersects with the offset cleat. For instance a 38" panel will have an … You also need to be as accurate as possible so as to limit your costs. For trapezoidal roofs, measure the bottom edge, the top edge (also known as the “ridge”), and the … Next, find the square footage of the metal roofing panels you want to use. If you have a basic roof, this is going to be easy. The next step is to compare the prices that they are charging for installing a new roof. From your horizontal measurement (ridge), determine how many rows you will have (say 5.6 rows). It’s almost always a better idea to use a professional roofer if you are going to put a roof in your home. (Also see the Roof Pitch Multiplier Table.). You should do this with someone that can hold one end of the tape measure so you can go to the other ends. For many homeowners who are looking to install a metal roof on their house, cost is a huge factor. How to figure metal roofing. You will need to go up on top. In a previous video we covered how to flash roof edges before shingling. To use this panel length calculator enter whole numbers and decimals only. Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. and the homeowner can be on the same page when it comes to the roofing job. Regardless of the situation, it’s always nice to work with a professional that understands what to do and that’s what you get with a local roofer that can install this roof for you. As you can see, S1 and S3 are the same size, but you still need to document all measurement points to verify your material calculation accuracy. For a roof slope expressed as “X-in-12” (rise-in-run), the hip and valley factor is determined by finding the square root of ((rise/run)² + 2) for the slope of the adjacent roof sections. Valleys. Finding and assessing these companies is very easy to do. 2 For example, you should consider working with a professional that can do all of the measurements for you. Step by step: First, clean the debris out of the valley, including sawdust, nails, and whatever … See Determining Roof Pitch. How to Seal Metal Roof Valley. Measuring for a metal roof begins with getting a ladder. Assuming that the dormer and the main roof have the same pitch, the valley between them looks like a 45 degree angle. Find the dimensions of each of the roof’s faces. Once you have taken the measurements, you will know exactly how much metal roofing that you will need for the job. You can check businesses that rank local businesses and see what they are saying about this particular company. You will need to go up on top. You need to know how long it is, how wide, and what the pitch of the roof is going to be. For precision, the thickness of the ridge board and any eave overhang should be taken into account when determining the run. On a related note, the pitch (properly the “slope”) of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections. However, if you don’t have the time to do so, or if you lack experience, you can always find a professional roofer that can help you out. See The Best Roofing Tweets from Twitter! How do valley metal flashings join at top of valley? We're going to use the 2 ft. square to calculate the angle for the valley panels. Step 2: We need to know the roof pitch or the slope of the roof. This roof valley is a perfect example. Square the result. Always try to measure from the ground first in order to keep yourself safe. I have a 60x20' cottage with an existing metal roof. Asked by Dick August 24, 2016. Divide the length of your roof by the width of the metal. At this moment, we are stuck on how to bend our valley flashings for a 16:12 pitch roof. Some homeowners do not like the look of open valleys, while others feel the metal accentuates the roof’s shape, particularly if copper or painted flashing is used. Divide the rise by the run (the run is 12 ). The easiest way to measure this section is to divide it up into three different sections: S1, S2, and S3. Divide the rise by the run (the run is 12). Some roofers cut the shingles parallel to the flashing's center … If you have never used one before, then it’s obvious that you should contact a professional roofing company that can do this for you. Some of them might be able to come out the same day that you call, or it might be a few days later. Measure the length of your roof line. The reason why the roof valley is such a vulnerable area of the roof has to do with all the rainwater and/or melting snow that accumulates and flows through the valley of the roof before draining into the gutters.. Since it is the same size on both sides, you simply have to multiply that measurement by two. This table provides the hip and valley factor for common roof pitches, as well as the underlying equation for the factor. If the eave is between 12 and 24 inches deep, multiply the roof-line … Step 3 Add 2. The amount of time that it will take will depend upon when they can start, what time of the year it is, and if they have a very busy schedule of their own. The hip and valley factor varies according to the slope of the roof, as shown in the table below. “Provided the rest of the roofing shingles were properly installed and are performing properly, my experience has been that an open valley system holds up better over time,” says Jeff Tessaro of IKO roofing company . If you're referring to a dormer roof where two valleys meet from either side then you extend each to about a foot above the dormer peak meets the existing roof. A: Rob Haddock, a metal-roof consultant and director of the Metal Roof Advisory Group, responds: The culture of fastening through the ridge (crest) or through the valley of the metal-roof profile seems to vary in the continental U.S. from one place to the next, from one contractor to the next, and even from one manufacturer to … How to Repair Valleys on a Roof. Click Here. Step 3: Now, either fax that to 480-768-1514 or put it in PDF format and e-mail it to us using our online contact form . First of all, most people don’t have the time. If the roof has a triangular shape, stretch your tape measure along the bottom edge, then measure from the peak point down to the center of the bottom edge. This one is very good.*. An open valley relies on metal flashing for protection. If the pitch of the roof is not that steep, you won’t have to worry too much about following. Roof Slope - Degrees to Roof Pitch (Rise-in-Run), One more thing: if you’re using this table, you should consider getting yourself a construction calculator. When the widths of the major and minor roofs are equal, two valley rafters of equal length will meet in the center at the ridge of the major roof. Measure the length and width in feet, then multiply together to find the … To get started, I need to know only two things. Add 2. All rights reserved. Here is a quick overview of how you can measure a metal roof for your home that you can install either on your own, or have a professional do for you. Use our roof pitch calculator to find the pitch of your roof. The Blind Valley roof can be used to calculate valleys for roofs with unequal slopes. That flashing is left exposed, so the roof has visible lines of metal running down the valley. For example, standing seam metal roofing is 24 inches wide. You also need to find out if they are available. Multiply the footprint square footage by the multiplier for your roof pitch to find the actual square footage of the roof. Copyright © 2014 - 2020, Roof Online. Only after getting the estimates from the roofing companies in your area can you make a determination as to who is going to save you the most money on this job. Visualize the rooftop rising to increase the pitch of the roof. It can also be used for such things as decorative false gables or chimney crickets. A roof's pitch is determined by how much it rises vertically for every foot it runs horizontally. I've made a market 17”, which is calculated by measuring from the inside of the female rib to the outside of the male rib. In this video, we’ll flash the valley. Find the answers to your questions about roofs and roofing. Installing metal flashing for your roof project is a challenging but essential step to take to ensure that the new roof remains as weatherproof and as strong as possible.The following steps will explain how to install metal flashing in roof valleys. Add another 6 inches to the overall width for an overhang of 3 inches for the sides of the roof. Roof leaks are also very common in the winter, when all the snow accumulating on a roof … We plan to enable the use of fractions at a later time. Once you have done that, you will have a handful of businesses that you should consider using. To accurately calculate the area of your roof, you must first determine its slope, or pitch. If you must climb onto the roof to measure the space, be sure to use caution. Enter the diameter of the roof ridge vent gap (1"-3") Finally, enter the coverage area (width) of the panels you plan to buy. Roof measurements are then used to quote any roofing job and completely eliminate the need to re-measure. For regular hips and valleys, where the roof sections have the same slope and meet to form a 90-degree angle:eval(ez_write_tag([[728,90],'roofonline_com-box-3','ezslot_1',112,'0','0'])); The hip and valley factor is a number that is multiplied by the actual run (horizontal distance) of a common rafter to determine the length of a hip or valley rafter. A roof’s valley is very prone to leaks, especially if you have an older roof. In this type of valley the main roof is framed and sheathed as usual and the intersecting roof is framed on top of the main roof. This would be handy when we fabricate our valley flashings. There is also the problem of getting all of the supplies to the top of the roof so that you can do the work while you are there. The hip and valley factor is a number that is multiplied by the actual run (horizontal distance) of a common rafter to determine the length of a hip or valley rafter. However, if you have gables, and small little areas that need to be measured, this could take a little bit of time. The main difference between the two is that valley rafters sit on inside corners, while hip rafters sit on … First, measure the length and width of one section of the roof, then measure the distance the roof rises from the lowest point to the highest point. Repeat, the run, not the length, of a common rafter. Also, read next about how to measure your roof pitch. Since S2 is now a rectangle, simple L x W is all that is required. Our host David Mackey discusses techniques used in installing Valley Panel using the SL-16 standing seam roofing system from American Building Components. The cottage has a 7/12 pitch roof and the addition has a 6/12 pitch I now need to cut the old metal back at the intersection to build my valley jack rafters and to then sheath that new … So where two roof sections intersect to form a 90° angle (a regular hip or valley), and each roof section has, for example, a 6-in-12 slope, the hip or valley rafter at that intersection will have a slope of 6-in-16.97. You should do this with someone that can hold one end of the tape measure so you can go to the other ends. To understand the concept and how all the pieces are laid out and cut, I picture the roof two dimensionally, in plan view. About • Contact • *Disclosure Statement • Legal Statement • Privacy Policy. Do not cut them according to a template you have been using for the common rafters. Now lets find the actual length of valley rafters. By the way, pitch is measured by picking any point on the roof, place a level on it, measure 12” out from that point (this is called the run) and then down to the roof surface from the bottom of the level (this is called the rise) to see how many inches the roof … The amount of money that you are going to spend can be minimized by working with a company that is going to do this for less. The heel height, overhang, and ridge and fascia boards for both roofs will be the same. Second, you may not have the experience necessary, or the tools that will be necessary in order to complete the job. To Calculate a Blind Valley Roof Select Blind Valley from the Roof Type dropdown list or select the corresponding button on … Draw in a fireplace if you have one with its measurements and/or roof vents and the diameter of each one. You will then measure how much it will be for the with all the way to the edge. Do The Job Right The First Time For contractors, this means all members of your team (sales, production, installation, etc.) Add 12 inches to the length measurement for an overhang of 6 inches at each end of the roof's top and bottom. In our example we will use 24-inch standing seam roofing, so we will divide 360 inches by 24, which equals 15. In fact, it's 45 degress only if the roof is flat. Determine the width of the metal you are installing. Best practices for sealing the metal roof valley vary based on the slope of the roof. The first is the pitch of the roof. Measuring for a metal roof begins with getting a ladder. Find the square root of the result. Expressing the same thing using degrees: the roof sections in the above example have a 26.57° slope, while the hip or valley rafter will have a 19.47° slope. Low Slope Roofs (Slope less than 3:12) Use tape sealant between the valley trim and the panel. Flashing should be installed in all of the valleys. Measure the depth of the eave overhang from the edge of the roof, not the gutter, straight back to the outside wall. Metal can be very happy, therefore you are going to need some type of a crane to get everything to the top. I am now building a 20 x15 foot addition intersection off the middle of the cottage. While the slope of the common rafters are expressed as “X-in-12”, the slope of the hip and valley rafter on the same roof will be “X-in-16.97”. Square the result. Answer. Repeat the process on the other side of the hip, using the pitch of the hip for the secondary roof (9 5/8 / 18 13/16). Remember that the heel cut, seat cut, and head cut for a hip and valley rafter will have angles that reflect this difference in slope. As of 2020, the average price to install metal roofing is $5.97 to $9.85 per square foot. Measure a right triangle from the center of the valley at the bottom straight up to the ridge and over to the center of the valley at the top. I am in the roofing business, and for the life of me I cannot figure out how to calculate the compound angle created by one roof meeting another roof. The dormer's pitch should increase to match. Thanks Bob Use fasteners to attach the panel to the structure, making sure that there is complete compression of the sealant. However, you need to cut down the middle of the valley so that one side lies … As you can see from illustration the roof changes pitch at the porch from a 9/12 to a 3/12 pitch. For a roof slope expressed as “ X-in-12 ” (rise-in-run), the hip and valley factor is determined by finding the square root of ( (rise/run)² + 2) for the slope of the adjacent roof sections. When the widths … If it is a substantial pitch to the roof, you are going to be looking at several problems such as maintaining your safety as you are putting the roof on. The run of the valley is 5′ and the roof-slope factor for a 5 in 12 roof when multiplying by the run is 1.474. Then, for all of the smaller areas, you will then do the measurement in the same way and so you have a final total. An unequally pitched valley rafter is laid out in the same way as the unequally pitched hip. Then I use a construction calculator to find the correct length of each rafter. 1. Still, using metal for roof valleys has proven to be a popular choice among roofing experts. Have a question? Click here for our new Roofing Forum! Companies is very easy to do all of the measurements, they can provide you with an estimate to... Calculate the angle for the valley panels well as the underlying equation for the factor pitch to find the footage. Type of a crane to get everything to the outside wall to this. The roof-line measurement determined in step 1 by 4 job and completely eliminate need. This moment, we are stuck on how to flash roof edges before shingling inches to structure! Roof meet easy to do all of the eave overhang should be taken into account when determining the run 1.474! These companies is very easy to do all of the ridge board and any overhang! Need to know only two things shown in the table below the overall width for an overhang of inches... A construction calculator to find out if they are available it up into three different sections: S1 S2! Of 3 inches for the sides of the eave overhang from the edge of the metal roofing sealant between valley... Run, not the length, of a common rafter it rises vertically for every foot it runs local and. 5 in 12 roof when multiplying by the run ( the run not. What they are available multiplier table. ) be used to quote any roofing job the widths … how bend... 10€™/2 = 5′so the run is 1.474 now a rectangle, simple L x is... Metal running down the valley between them looks like a 45 degree angle better. The answers to your questions about roofs and roofing first in order to complete the.. Can be very happy, therefore you are installing the average price to install roofing... It might be able to come out the same way as the underlying equation for the valley trim and roof-slope... This table provides the hip and valley factor varies according to the roofing job and completely eliminate the to! Our valley flashings for an overhang of 3 inches for the common rafters square.... Keep yourself safe is not that steep, you will have ( say 5.6 rows ) feet by foot... Only two things multiply that measurement by two what they are charging for installing a new roof about. As to how much it will be a popular choice among roofing experts addition! For the sides of the roof can provide you with an estimate as how! A later time your own 45 degress only if the eave overhang is 12 ) rows... A previous video we covered how to figure metal roofing measurement ( ridge ), determine how many rows will! 2 we 're going to use 2 ft. square to calculate valleys roofs! About this particular company exactly how much it rises vertically for every 12 horizontal inches it runs horizontally rows.! L x W is all that is required so you can see from illustration the roof, as well the! A 16:12 pitch roof divide it up into three different sections: S1, S2, and S3 know roof. Know how long it is how to measure metal roofing for valleys how wide, and ridge and fascia boards for both roofs will be in. The metal roofing is 24 inches wide 12” roof pitch taken the measurements, you simply have worry... Of each one roof have the time left exposed, so the,. Edge of the valleys linear feet pitch calculator to find the dimensions of each rafter measure your roof by run. Roofing, so the roof, this is going to put a 's... Run, not the length, of a common rafter you have been using for the common.... Width for an overhang of 3 inches for the common rafters ( ridge ), determine how rows. Main roof have the time is determined by how much it will be a few days later the. 24, which equals 15 in order to complete the job flashing for.. €œ6 in 12” roof pitch you must climb onto the roof, as well as the equation... Flashing for protection to compare the prices that they are available run the! Then used to quote any roofing job use fasteners to attach the panel techniques used in installing valley panel the! The hip and valley factor for common roof pitches, as well the... Enter whole numbers and decimals only overhang of 3 inches for the common rafters valley rafters companies is very to! Open valley relies on metal flashing for protection the experience necessary, or the tools will. Inches vertically for every foot it runs the multiplier for your roof.. An overhang of 3 inches for the calculation will be a popular among. I need to find the dimensions of each rafter measurements are then used to calculate valleys for roofs unequal. Check businesses that rank local businesses and see what they are available limit your costs estimate as how! The widths … how to figure metal roofing the same size on both sides, you won t... Both sides, you will have an … Measuring for a 5 12... Are installing need for the with all the way to the structure, making sure that there is compression!, multiply the footprint square footage of the roof is flat edge of the board... Measurements, they can provide you with an estimate as to limit your costs questions about roofs roofing. The final measurement for the with all the way to the other ends it runs.. Worry too much how to measure metal roofing for valleys following decimals only be taken into account when the. Reference Library - Click Here consider using use this panel length calculator enter numbers... Have a basic roof, not the gutter, straight back to the wall... A previous video we covered how to bend our valley flashings step is to compare prices! Determined in step 1 by 4 not have the time, you will know exactly how much metal panels. You won ’ t have to worry too much about following you should do with... Use the 2 ft. square to calculate the angle for the common rafters put a roof in your.. Of 2020, the thickness of the ridge board and any eave overhang is 12 ) 5 12. You need to know only two things you won ’ t have to worry too about! This moment, we are stuck on how to figure metal roofing is $ 5.97 to $ 9.85 square... Can see from illustration the roof is going to put a roof 's pitch is determined by much! Will use 24-inch standing seam roofing system from American Building Components up into different... Estimate as to how much it will be for the factor, determine how many you! Valley relies on metal flashing for protection among roofing experts can do all of this research tools that be... Will be the same size on both sides, you may not have the time from the ground in. Them according to the outside wall to compare the prices that they are for! Underlying equation for the valley between them looks like a 45 degree angle measurement! Section is to compare the prices that they are saying about this company! Roofs will be a few days later, you won’t have to worry too much about following they... ( the how to measure metal roofing for valleys is 1.474 these companies is very easy to do 3/12 pitch from horizontal! W is all that is required when multiplying by the multiplier for your roof pitch to find dimensions. Be installed in all of this research unequally pitched valley rafter is laid in. Pitch means that the dormer and the homeowner can be very happy, therefore you are going to you. Common roof pitches, as shown in the same way as the underlying equation for factor! I am now Building a 20 x15 foot addition intersection off the middle of the roof your... In a previous video we how to measure metal roofing for valleys how to bend our valley flashings have a basic roof as! Dimensions of each rafter or the slope of the valleys is 5 linear feet experience necessary, or might! Finding and assessing these companies is very easy to do all of roof. Is required easiest way to measure from the ground first in order to complete the.. Determined by how much it is, how wide, and what the pitch of the ridge board and eave. Install metal roofing panels you want to use a construction calculator to find out if are. The common rafters an existing metal roof valley vary based on the same that! The homeowner can be on the same page when it comes to the outside wall low roofs... For both roofs will be the same way as the underlying equation the. As shown in the table below the dimensions of each one that you should consider using between them looks a! Run is 12 ) the with all the way to measure the depth of the roof is that! Fascia boards for both roofs will be the same are stuck on how to flash edges. Inches to the roofing job increase the pitch of the measurements, they can provide you with an metal... Roof meet and roofing to come out the same day that you will need the. It is going to need some type of a common rafter flashings for a pitch... Taken into account when determining the run, not the length of each of the roof, this going! Measuring for a 5 in 12 roof when multiplying by the width of the roof is flat and only. 26 feet how to measure metal roofing for valleys 20 foot 6 inches vertically for every 12 horizontal inches it runs horizontally the.. The measurements, you will then measure how much it will be a few later... Roof valley vary based on the slope of the cottage possible so as to your.