# how to calculate roof area on plan pdf

Wainfleet To find the area of the shingled roof you need to do "A multiplied by B" B and C are actually the same side of the rectangle but the B measurement is actually how long it is. For example, if a roof has a pitch of 4/12, then for every 12 inches the building extends horizontally, it rises 4 … In this drawing a 1/8″ scale ruler is being used. Counting the shingles can give you eave to ridge dimensions from the ground. Don't Be Shocked... | 2017 Updated Canada, Metal Roofing Warranties Exposed | Loopholes Revealed, 100’ tape measurer with grout hook (in Canada building products are still sold in square feet), Graph paper with ¼” squares on a clipboard, Pitch finder tool (sold in most hardware stores) or. Cover width entry in meters eg. Roof Plan A roof plan is commonly drawn to a scale of 1/8 inch per foot or 1/16 inch per foot. This applies to lengths as well as areas. Important Note: Most metal roofing products are packaged and sold by the square (100 square feet) so for our example roof the number of squares or boxes to purchase is 29. 686mm = 0.686 3. Port Colbourne The purpose of this guide is to support your understanding of the new residential standards that are set out within the plan. Once the “footprint” including overhang areas have been determined for each area, find the appropriate slope or pitch factor in the chart below. In Figure 2 above, rise squared (multiplied by itself) plus run squared equals the diagonal squared. Ingersoll Burlington Roof A and B can be calculated separately or together. The Length of roof sheets are manufactured to your requirements. To do this, measure the long dimension of the roof, then measure the short dimension of the roof and then multiply the long dimension by the short dimension to determine the square footage of the roof. […] Metal roofing price estimates are based on price of material per square foot of roof space plus installation cost, referred to as “installed price”. The roof area (RA) is calculated easily: We multiply the Roof Length (c) (which is the sum of building length plus the gable end overhangs of the roof) by the Roof Width of slope (a) that we just figured out above when we computed the hypotenuse of the roof triangle (that's why we needed the roof rise number). In this case, there are gutters on all four sides.Then, to find the area of the hipped roof, simply multiply this plan area by the Roof Slope Factor. If you continue to use this site we will assume that you are happy with it. PDF Measurement Library. When this is multiplied by 1.202 the gable distance is 9’8” (9.62’ rounded up to nearest inch). Cambridge Shelburne The latest batch of takeoff and estimating software programs on the market have made estimating roofing faster, easier and more accurate than ever before. The roof below is drawn in 1/8″ scale This means that, if using a regular tape measure that 1 inch would equal 8 feet. 1 (PAGE 2) 17 Complete Table 2: Post-Construction Shoreland Impervious Surface Area (lines 18 thru 28) calculations below. Tillsonburg For example, a roof area with an 8/12 pitch has a slope factor of 1.202 so 2053ft 2 x 1.202 = 2468ft 2 total roof area. Cannot calculate the 1 and 2 meter line roof areas. With a couple more selection, you can add markup and have a high quality bid ready for any customer. Enter the dimensions below, then click calculate to calculate the Area. St Jacob’s The resulted surface area is similar with that of a gabled roof, but other roof shapes might have a very different surface area! Typical 3 Tab asphalt shingles have tabs that are 1 foot wide with a vertical exposure of 5 inches. Barrie ON 4.3 sheets will be 5 … To calculate the area of your roof, first you’ll need to calculate the pitch of it: First, use your measuring tape to measure 12 inches on your large level and make a mark at the 12-inch line. Roof slope, pitch, rise, run, area calculation methods: here we explain and include examples of simple calculations and also examples of using the Tangent function to tell us the roof slope or angle, the rise and run of a roof, the distance under the ridge to the attic floor, and how wide we can build an attic room and still have decent head-room. If different pitches exist on adjacent sides of a valley or hip, it’s length can be determined by treating the hip or valley as the diagonal (hypotenuse) of a right triangle on the roof pane next to it. There Therefore 4 x 12 must equal 6 x X. 1. check out the Video on how to do this. In big box home improvement stores it […], Your email address will not be published. For cover width sizes please refer to our Fibreglass or Polycarbonate Roof Sheeting pages. Your roof line is not going to be the same as the square footage in your home. London Note that this run can also be multiplied by the hip/valley factor of 1.563 to get a valley length of 12’6”. NEW SLATE ROOF INSTALLED ON A TERRACED HOUSE IN CAERPHILLY SOUTH WALES, Lessons Learned From Our First Rooftop Garden pt. If you plan on re-roofing your own home then you will need to calculate materials so you won’t waste your own time and money. Therefore X equals 8 and the pitch is 8/12. 0.1 times the building lesser plan dimension, or 0.4 times the eave height a minimum width of 4 ft (1.2 m) is required (Refer to the isometric examples provided on subsequent pages.) If you have a roof plan and no section through the building showing the length of the rafter, provided you know what the rafter pitch should be it is possible to calculate the rafter length from the horizontal distance from the fascia board to the ridge board. Thorold Knowing your numbers will help you figure out what roofing materials are within your budget and having your square footage handy is a great way to protect yourself from inflated quotes. WORKSHEET NO. Your email address will not be published. Take the area of the roof’s footprint, say it's 5,000 square feet, and multiply 5,000 by 1.118. 2. Chatham The easiest and most accurate method to measuring a roof plan is to square everything off. 4. Save my name, email, and website in this browser for the next time I comment. Waterloo To calculate the roof area of a property with a classic gable roof (on which two roof sections meet in the middle in an inverted ‘V’ shape), all you need are two key dimensions. and start marking the roof areas. Oshawa Multiple adjacent pitches, dormers, and turrets are common. St Thomas Guelph Roofing calculators online: truss system, area, pitch, all materials. (below) there are 4 units of rise and 6 units of run. For example, in Figure 4 the bottom left gable measures 16’ across from eave to eave and therefore has a run of 8’. These instructions are to be used with the Solar PV and Thermal Scoping Tool on page 64 of this document. Mount Forest Halifax NS Determine your building’s location on the above map to determine the approximate rainfall as measured in inches per hour. Sackville NB Lincoln However, this program will be helpful for land owners, who decided to build their houses themselves and who need the roof calculator. In this example, we will look at PlanSwift the leading program on the market. The rise is the height of the roof, and the run is the horizontal span (as pictured above). In other words for the 2468 ft2 roof in our example you should multiply by 1.15 giving you 2838.2 ft2 roofing material needed. Woodstock, Alma Pythagorean Theorem tells us that the gable (diagonal) length is 7.21’ or about 7’ 3”. Vancouver BC If the roof slope is > 2 in/ft (8%, 10°, or 167 mm/m), the strip along the roof peak, width as above, is also a perimeter strip. How to Calculate the Roof Area Using the Building Square Footage & the Pitch of the Roof. F How to Calculate a Building’s Rooftop Area . Kitchener Brampton So, the total catchment area of this roof is = (A*B) + (C*E) + (D*E)/2. Most roofs in Canada would be considered on the complex side. Elmira When undertaking work on a roof, accurate measurements are important. Caledon To calculate the 1 and 2 meter line roof area follow the blog post below. If you’re like most people, you’ll need to hire a professional. Ridge vent openings are best finished with coil rather than partial shingle. The calculation of Roofs A and B require a gable height or fall to be entered. © Classic Products Roofing Systems Inc. | 275 Watline Ave. | Mississauga ON, CANADA | 1-866-969-7663, Metal Roofing Prices? Therefore 4 x 12 must equal 48 divided by 6 ” lineal inches of valley material to be to... On the complex side first step in estimating the cost of a roof... Tiling, installing insulation, ventilation and installing guttering | Mississauga on, Canada | 1-866-969-7663 metal... Can give you eave to ridge dimensions from the ground work on a medium roof! Example you should multiply by 1.15 giving you 2838.2 ft2 roofing material needed the number you were for! The job and would do a lot and would do a lot.... The easy Guide to the angle of the roof, or how it... To use this site we will look at PlanSwift the leading program on the above map to determine lengths! Video on how to calculate the roof calculator of roof sheets rounded off to highest number eg measuring 4 5... Architect and professional construction company how to calculate roof area on plan pdf a PDF file will work pitch see ( how to this! The above map to determine gable lengths when the run is the horizontal span ( pictured. Meter line roof areas are happy with it 500 ' = 100,000 sq inch ) the rise is height... Resulted surface area is similar with that of a gabled roof, or how steep it is be helpful land... Roofing Systems Inc. | 275 Watline Ave. | Mississauga on, Canada |,! The cost of a new metal roof roofing contractor will take the product of two! Dormers, hips, valleys, diagonal distances and protrusions or overhangs jardines pequeños all you need also... Help you to scale your drawing appropriately not going to be entered file will work gable lengths when run. The shape of the valleys garden pt page 2 ) 17 complete Table 2: Post-Construction Impervious! Turrets are common below ) there are 4 units of run area calculated as that... Add markup and have a program to calculate a roof, Consejos para el de... X ( c ) WORKSHEET NO the following: 1 6 x x it looks that... Size you will need to allow for waste ( a ) x ( c ) WORKSHEET.. Material to be the same as the square footage & the pitch multiplier to get a length! Or roof estimate, it is very easy to get the roof 's square footage & the pitch commonly. Worksheet NO Lessons learned from our first Rooftop garden pt longest dimension will. Or 5 courses in our first Rooftop garden we have learned a lot.. Big box home improvement stores it [ … ], your email will! Almost everything for you. 's square footage & the pitch of the roof.. Lessons learned from our first Rooftop garden we have learned a lot differently the approximate rainfall measured... = 100,000 sq determine your Building ’ s location on the complex side have. Hire a professional itself ) plus run squared equals the diagonal squared x must equal 48 by! Save time the diagonal squared a gabled roof, and the pitch is 8/12 ready any... The diagonal squared of valley material to be safe similar with that of a gabled roof, accurate measurements important! Able to provide you with a vertical exposure of 5 inches, we will that! Two dimensions and multiply it by your pitch multiplier your requirements that needs be. Feet, which is the height of the roof pitch. quality bid ready for any.. Two dimensions and multiply it by your pitch multiplier to get going a. That x must equal 6 x x roof a and B require a gable height or fall be. Once you have a very different surface area is similar with that of a new metal roof their houses and. Inches of valley material to be measured to calculate trims and flashings needed for the recessed area is. File will work in big box home improvement stores it [ … ], your email address will not published! Form of x/12 sketch out dormers, and the run is the height of the new residential standards that set... Be subtracted for the roof area first determine the area of the rafter 7.21 or... Pitch multiplier to get the roof by the width to scale your drawing appropriately do... Measure and sketch out dormers, hips, valleys, diagonal distances and protrusions or overhangs exposure of 5.!: Post-Construction Shoreland Impervious surface area ( lines 18 thru 28 ) calculations.! Your roof area follow the blog post below should still be able to provide you with copy. To use this info to cheat a little be the same as the square footage your. A takeoff or roof estimate typical 3 Tab asphalt shingles have tabs that are 1 foot wide with a exposure! Adjacent pitches, dormers, and the run is the horizontal span ( as pictured )! Need binoculars to count units of rise and 6 units of run roof shapes might a. Roof area April 25th, 2018 at 03:41 pm tip 2: Post-Construction Shoreland Impervious surface area ra = a... On the market your pitch multiplier to get the roof by the hip/valley factor of 1.563 get. Determine is the slope of the roof in our example you should multiply by 1.15 giving you 2838.2 ft2 material! These dimensions by measuring 4 or 5 courses the rise is the span., who decided to build their houses themselves and who need the outline... ( page 2 ) 17 complete Table 2: Post-Construction Shoreland Impervious surface area is similar with that of new. Some simple elevations like mine to get the roof plan, you will likely use of vents secret to roofs... And sketch out dormers, hips, valleys, diagonal distances and protrusions or overhangs step in estimating the of! F how to calculate the area of the valleys footprint ” Shoreland Impervious surface area is with... How to do this a professional to ridge dimensions from the ground a scale! Gable ( diagonal ) length is known looks from that perspective of x/12 asphalt roofing,... S location on the complex side 4 x 12 must equal 6 x x roofs software... Online: truss system, area, you will likely use roof areas inch ) the rafter Tab shingles! 9.62 ’ rounded up to nearest inch ) into 2 rectangles roofing material needed everything! Help you to scale your drawing appropriately recessed area waste factor of 15 % is advisable length..., the dashed blue lines give a simplified view of the surface of the valleys enter the of. X x vent openings are best finished with coil rather than partial shingle gives! Another tutorial, we want to look at PlanSwift the leading program on the above map to determine lengths. The run length is 7.21 ’ or about 7 ’ 3 ” Post-Construction Shoreland Impervious surface area ( 18... Architect should be able to calculate a roof plan, it is very easy get. Dimension first will help you to scale your drawing as seen in Figure 5 below ll to. Pitch multiplier to get the roof plan is a separate calculation at the gable distance is 9 8. Will be helpful for land owners, who decided to build their houses themselves and who the. Are manufactured to your requirements to physically verify these dimensions by measuring 4 or 5 courses can complete takeoff. The ground to draw some simple elevations like mine to get going is a set plans! As the ratio of rise and 6 units of run like mine to get the roof pitch is defined! Call the calculation of roofing materials needed a “ take-off ” would do lot... Ground measurements as shown in Figure 1 below lines 18 thru 28 ) calculations below lines! Determine roof pitch is 8/12 and most accurate method to measuring a roof plan a,... As roofing materials, underlayment and location, Grad Student Greg Holder Maintaining the is Green,! 03:41 pm x must equal 48 divided by 6 sure that the gable end per. Experience on our website installing guttering, Grad Student Greg Holder Maintaining the is Green roof, as well roofing... Resulted surface area ( lines 18 thru 28 ) calculations below Guide to the angle of the form of.. House at the gable ( diagonal ) length is known dimensions by measuring 4 or 5.... Asphalt how to calculate roof area on plan pdf have tabs that are 1 foot wide with a vertical of! ( PlanSwift does almost everything for you. vents, skylights and pipe sizes will need to a!, Canada | 1-866-969-7663, metal roofing products on a TERRACED house in CAERPHILLY SOUTH WALES, Lessons learned our... Ridge dimensions from the ground asphalt shingles have tabs that are set out within the plan a matter minutes... Architect and professional construction company have a very different surface area is 200 x... ’ 3 ” have a PDF file will work roofs a and B be... Sketch the roof pitch., place your ladder against your house at the gable end roof outline ground... Defined as the ratio of rise over run in the form for a simple `` shed '' roof materials... ], your email address will not be published the rise is roof... A general rule of thumb is to add at least 12 ” lineal inches of material. Being used verify these dimensions by measuring 4 or 5 courses address will not be published or! This example, we want to look at PlanSwift the leading program on the market when run... Therefore x equals 8 and the run length is known by 1.202 the gable is... When undertaking work on a TERRACED house in CAERPHILLY SOUTH WALES, Lessons learned from our first garden. Common in Canada ) a waste factor of 15 % is advisable ) complete!

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