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Why choose satellites for roof measurements?

Get Accurate Measurements AND Estimates in Minutes: Satellites are more accurate than the most experienced contractor’s hands. You’ll get EXACT measurements of your roof with no human error. We’ll even provide an estimate for costs based on the average roofing materials.

Why choose our aerial roof measurements?

We’re dedicated to saving your time, reducing your cost of business, improving your customer service, and profitability by providing your business with automated Aerial Roof Measurements. Our reports are unique because They are just as accurate as on-site measurements, Our valuable customers confirm this statement.

Is Google Earth a good way to measure your roof?

There are many great benefits to using Google Earth to measure your roof but nothing is as good as using Sky roof measure. The first of which is that you don’t even have to go up on the roof.

Drone Inspections Improve the Accuracy and Consistency of Roof Measurements

From twisted tape measures to inconsistent endpoint selection, to inaccessible edges, it’s difficult to maintain accuracy and consistency within a set of roof measurements.

But where human ability falls short, machine learning now picks up the slack. Solutions like Sky Roof Measure use the latest advances in drone mapping technology to take accurate measurements of square footage, roof features, pitch, surface area, and slope in a matter of minutes. And rigorous tests have shown these measurements to be consistently 99.4% accurate.

No more worrying about inaccurate data or having to return to a site to gather missed information. The solution uses a set protocol for selecting endpoints, so measurements are complete and consistent throughout an entire project.

Benefits of Roof Report From Drone

  • Automate the collection of high-resolution roof imagery
  • Generate accurate roof reports with the click of a button
  • Take consistent, accurate measurements of square footage, roof features, pitch, surface area, and slope
  • Access a PDF file for easy sharing and collaboration
  • Export a roof geometry DXF file compatible with your existing tools for CAD analysis and design
  • 3X faster than traditional methods
  • Collect data in a consistent, repeatable way
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Aerial Estimation | Aerial Roof Measurements | Aerial Roof Measurement Reports

Aerial Estimation is the most complete source for all your Satellite Roof Measurements. We know what contractors want. Roof Measurements including Area, Rakes, Ridges, Hips and Valleys, and every edge is separately measured and identified.

How are your aerial roof measurement reports prepared and verified?

Our aerial roof measurement reports are prepared by trained CAD technicians followed by a 3 Step verification process by a quality assurance professional, certifying absolute data accuracy on every report we deliver. a wise man once said ” When You arrive empty handed, you’ll return empty handed”.

How accurate are roof measurements?

In fact, our roofing measurements have been proven accurate to within 2%-5% and fastest report delivery compared to other Aerial Roof Measurement Companies. Don’t Hand Measure a Roof, Get A Roof Report Using Accurate Satellite Roof Measurements at Sky Roof Measure.

What is aerial estimation?

Aerial Estimation is the most complete source for all your Satellite Roof Measurements. We know what contractors want. Roof Measurements including Area, Rakes, Ridges, Hips and Valleys, and every edge is separately measured and identified.

What types of images do our roof reports support?

Multiple image providers for over 98% coverage of the USA & Canada. Also supports file formats such as XML,RFX,DFX/DWG, ESX AND WRL. Our roof reports start at under $13 with no set-up or membership fees.
aerial roof measurement

Our Goal & Specialization

Our goal at Sky Roof Measure is to streamline your day to day operations by automating your employees and allowing them to work more efficiently with the help of our interactive Roof Reports. When your roof report is ready, it is not just emailed to one person, or available for download into a single desktop application, it is available to anyone in your company using a web based user account. All your reports saved on our database and you can view and download any time as per your convenience. Our 3D Roof reports include Aerial Images, rakes, flashing, valleys, ridges, multiple slope areas, pitch, linear measurements, total squares, recommended waste, etc. Our System can Export and import file formats such as XML,RFX,DFX/DWG and WRL.

AERIAL ROOF REPORTS Affordable roof measurement services for roofers, general contractors, builders, and distributors in the U.S and Canada.

Estimate Roof Size

Estimate Roof Size | Get a Pro in Your Area

To find your roof’s total square footage:
  1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
  2. Add the square footage of each of the planes together.

The Technique For Estimating Square Footage of Hip Roofs is Different

There is a different technique I use when measuring “hip” roofs, which have 4 sides and are shaped kind of like a pyramid. These roofs make it tough to count shingles so, through trial and error, I came up with a little calculation that has provided me with another simple but accurate estimation. When using this second calculation, the total square footage number you end up with may be a little higher than what is actually there. But I would rather slightly over-estimate the size of a roof job rather than under-estimate it, like I did a few times early on. This was before I started using these two calculations.

For Hip Roofs, I measure the length of the house and then I measure the width. I then multiply these 2 numbers together and I take that number and multiply it by 1.35.

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. 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.

Speaking of cameras, the second most important feature to have in a digital camera that you plan to use for your Property Preservation Business, is that the camera’s flash provides enough light for you to take “above average” quality pics in complete darkness.

How to Measure Roof Pitch

Knowing the pitch of your roof is useful when designing an addition, installing skylights, or cutting new rake boards. Here’s an easy, safe way to determine the pitch from inside your attic.

  1. To measure the roof pitch, you’ll need an 18- or 24-inch level, a tape measure, and a pencil.
  2. First, measure 12 inches from one end of the level and make a mark.
  3. Then, in the attic, place the end of the level against the bottom of a roof rafter and hold it perfectly level.
  4. Now measure vertically from the 12-inch mark on the level straight up to the underside of the rafter, as illustrated. That measurement is the number of inches the roof rises in 12 inches.

aerial roof measurement

What is the average size of a roof?

You will need to express this size in terms of square feet. Keep in mind that the average size of a roof is 1,700 square feet, so your total will likely be 10% higher or lower than this figure. Check that your footage measurements are within this range so you can start off on the right foot.

How Much Does A New Roof Cost?

The average roof replacement cost is $4,200-6,600 on a 1,600 sq.ft. ranch house using asphalt roof shingles.

However, if you use premium materials such as metal, wood shingles, clay tile, etc, the cost of your roof will be at least $9,500 – 16,000.

Roofing prices can vary widely depending on the size and complexity of your roof, type of materials you use, as well as your location.

Here are average roof replacement costs that contractors across the US charge to install a 1500 sq. ft. roof, including removal of one layer of old shingles.

 
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WHAT IS AERIAL ROOF MEASUREMENTS?

Measure the width and length of each plane of the roof (including dormers), and then multiply those numbers to get the correct figure for the square footage of that area. Note any skylights, chimneys or other parts of the roof that would not require materials so you can subtract those measurements from your total area.

Why choose our aerial roof measurements?

We’re dedicated to saving your time, reducing your cost of business, improving your customer service, and profitability by providing your business with automated Aerial Roof Measurements. Our reports are unique because They are just as accurate as on-site measurements, Our valuable customers confirm this statement.

What is satellite roof measurement?

Satellite Roof Measurement are measurements taken from an aerial view of your home. The measurements are then calculated with software. You can actually do this on google maps with the aerial view of the house. There is even a measuring tool that can tell you how many feet by how many feet the roof is.
Aerial Estimation is the most complete source for all your Satellite Roof Measurements. We know what contractors want. Roof Measurements including Area, Rakes, Ridges, Hips and Valleys, and every edge is separately measured and identified.

How do you measure a roof for a light?

The most accurate method: Use a measuring tape.

Pretty simple, measure along the roofline either directly at the edge between two people on ladders, along the ground under the roofline, or while walking along the ground with a rolling measure under the roofline edge.

How do you measure a roof edge?

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. Multiply this measurement by the length of the roof from end to end, and add this to the first result. Double the result to determine the total area of the roof at both sides.

How are holiday lights measured?

The distance between individual lights is all over the map. Take a tape measure with you to determine the spacing between lights, and buy sets that come with less than 12 inches between bulbs. Typically, larger bulbs, like chunky C7s or C9s for the roof, look best when the lights are between 6 and 10 inches apart.

What is the difference between C9 and C7 bulbs?

The Main Difference: Size!

C7 Bulbs are much smaller than the larger C9 Bulb. C-9’s are longer, wider, and fit into a bigger socket. As you can see from the photographs above, the C7 Bulb is usually 2-1/8in in length and 7/8in in width. In comparison, the C9 Bulb measures 2-7/8in in length and 1-1/8in in width.
SkyRoof Measuring

Roof Measurements

What is the standard unit for roofing measurement?

A roofing square is a unit of measurement for calculating the size of a roof and is equivalent to 100 square feet. The larger unit is useful for calculating the amount of material needed for a roof. It’s common to calculate the size of your roof in “squares”, and then order an additional 15% in backup materials.

How do you calculate the rise and run of a roof?

Calculate the roof rise using the figures for unit rise and total run. Multiply your figure for unit rise by your figure for total run to get the total rise. Using the example, it would be six inches times 13 feet. The total roof rise in the example equals 78 inches.

How do I calculate a rise?

Subtract the difference in elevation between two points on a hill to calculate the rise. The elevation could be determined by an altimeter or you could use a topographic map. As an example, you might read 900 feet at the top of a hill and 500 feet at the bottom, so subtract 500 from 900 to get a rise of 400 feet.
 

What are the 4 types of slopes?

Slopes come in 4 different types: negative, positive, zero, and undefined. as x increases. The slope of a line can also be interpreted as the “average rate of change”.

How to measure your roof area from the ground

A more accurate way to calculate the area of the roof than using Google Earth is to get outside to estimate the roof pitch and the base area of the property. Using these two figures, we can get a good idea of the shingle roof’s square footage and estimate your asphalt shingles’ needs and costs. This DIY technique can be helpful, especially if you are not comfortable getting on your roof, or if you have limited access to it.

Ground measures only work well for a gabled roof, since there are usually just two main rectangular pitches to calculate area for. For more complex roof shapes, like hip roofs, you’ll need to work with a roofer or measure from on top of the roof itself to calculate its total area.

Roof Measurement Report :

The Roof Measurement Report provides a detailed analysis of your roof layout and all the critical dimensions. Our full color report provides the detailed lengths, pitch and areas of every surface plane and edge. This report saves your time and enables accurate roof estimates for a roof repair or replacement. This is a professional grade report used for use by licensed roofing contractors or insurance companies. You will receive the report in .PDF format by email within 1-3 days. Follow us!

REPORT INCLUDES THE FOLLOWING:

  • Images: 1 Orthogonal (overhead), 4 Oblique (birds eye), and 1 Street View (where available), all in full color.
  • Roof Measurements and Areas: includes Eaves, Rakes, Ridges, Hips and Valleys, and edges are all separately measured and identified.
  • CAD style drawings with colored lines identifying every type of roof edge and area for each plane/section.
Here's a step-by-step guide to measuring with blueprints

Roof Report

How to Write a Roof Inspection Report [With Templates]
  1. Communicate details in a way the homeowner can understand. …
  2. Create a separate roofing estimate. …
  3. Use the report as a marketing opportunity. …
  4. Use resources to build roof inspection reports. …
  5. Keep it professional.

Create a separate roofing estimate.

Be professional in your roofing business strategy. To reduce pressure on potential customers, always keep roofing estimates separate from your roof inspection reports. 

That’s not to say you shouldn’t have the estimate on hand if you choose to provide the inspection report in person. Homeowners want to know their options without feeling pressured to make a decision on the spot. If the atmosphere feels right or if the homeowner asks, review the estimate together section by section.

Use the report as a marketing opportunity.

Writing a roof inspection report is likely not your favorite task as a roofer. However, think of it as an opportunity to set your company apart from competitors. You haven’t yet closed the job, so this is one more opportunity to make a unique impact on the homeowner.

Incorporate your branding, from colors to font styles to your witty company logo. If they found your company online, they may connect your website to the roof inspection report simply through these minor details. Consider increasing consistency and professionalism by adding these details to company shirts and vehicle magnets.

Portraying a professional image from the start can help you land the job. Maintaining that professionalism throughout the roof replacement or repair process can increase your referral rate. 

What is an easy-to-read roofing report?

Easy-to-read reports show your customers that you recognize their needs and aren’t trying to impress them with industry terms they don’t understand. Along with brief descriptions, add photos of the problem areas on their roofs.

Our Expertise

We have a group of experienced experts who can work utilizing various applications. We can embrace any sort of innovation or exclusive programming application according to customer necessities to deliver Roof Reports. We stringently never utilize any such restrictive data or programming application across customers. We work with non-divulgence arrangements set up. We have numerous long stretches of involvement with this Roof Diagramming administration and can deal with any volume of work with a specified time and turnaround as low as 12 hours or considerably lesser while keeping up top-notch principles. We are truly adaptable in our work and can work nonstop if there is proceeded with business. Extra assets can likewise be used if the interest is more. We are consistently open to having discourse and portray our administrations in more noteworthy detail. We can work to execute a no-commitment pilot venture to display our capacities and administration norms.
 
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Roof Measurement Report for RESIDENTIAL Roofs

The Roof Measurement Report provides a detailed analysis of your roof layout and all the critical dimensions. Our full color report provides the detailed lengths, pitch and areas of every surface plane and edge. This report saves your time and enables accurate roof estimates for a roof repair or replacement. This is a professional grade report used for use by licensed roofing contractors or insurance companies. You will receive the report in .PDF format by email within 1-3 days.

How to Manually Measure a Roof

To manually measure a roof without the help of aerial measurement reports, you must visit a job site and climb onto the roof to take precise roofing measurements by hand. Here are the 6 steps to get a manual roofing measurement.

 
  1. Measure the width and length of each plane of the roof (including dormers), and then multiply those numbers to get the correct figure for the square footage of that area.
    Example: Plane 1 (A x B): 50’ x 20’ = 1000 sq ft
    Plane 2 (A x C): 50’ x 20’ = 1000 sq ft
  2. Note any skylights, chimneys or other parts of the roof that would not require materials. You can subtract those measurements from your total area.
  3. Add together the calculated square footage of each surface to get the figure for total square footage of the roof.
    Example: Plane 1 (1000 sq ft) + Plane 2 (1000 sq ft) = 2000 sq ft
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  1. After determining the total square footage of the roof, you must calculate the pitch of the roof. Measure the vertical distance (rise) over a 12 inch horizontal segment (run).
    Example: The rise of this roof is 5”.
  2. Write down these numbers as the vertical measurement listed first and the horizontal measurement recorded second so you can find rise over run.
    Example: The rise over run of this roof is 5” over 12”.
  3. When you have the total square footage and rise over run of the roof, you can calculate the roof squares to determine how much materials are needed to cover the roof. To calculate the number of squares on a roof, you need to divide its total square feet by 100.
    Example: 1000 sq ft / 100 = 10 squares

With those roofing measurement figures, you can then estimate the roofing supplies needed for a job.

How do you find the sq ft of a roof?

To find your roof’s total square footage:
  1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
  2. Add the square footage of each of the planes together.

How do I estimate roofing costs?

According to Sky Roof Measure, the typical range for roof replacement costs is between $5,100 and $10,000, but roof replacement can be as low as $1,200 or as high as $30,000. Many roofing companies will charge between $3.50 and $5.00 per square foot.

What is a fair price per square for roofing?

A replacement could be as low as $1,200 or as high as $30,000. With that said, on average, most roofing companies will charge somewhere between $3.50 and $5.50 per square foot, or $350 to $550 per square (100 square feet) to install or replace an asphalt shingle roof.

How much does it cost to tear off and replace a roof?

Most homeowners can expect the average cost to tear off and replace a roof to be around $12,000 to $15,000. This price is based on a home with 3 bedrooms, 2 bathrooms, a walkable roof pitch, a little roof complexity, and architectural asphalt shingles.

What is the cheapest way to replace a roof?

While asphalt is the cheapest roofing material, there are 3 different types of asphalt shingles that vary in price and affect how much you’ll spend on your roof replacement. 3-tab shingles are the cheapest of the 3 types of asphalt shingles and are a great option for a tight budget.

How many times can you overlay a roof?

Installing new roof shingles over old effectively doubles the weight of the roofing, so you have to make sure your roof structure can handle the extra load. That’s also why building codes commonly limit re-roofing to no more than two layers.
 
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Roof Measurements – How to Get a Roofing Measurement USA

To find your roof’s total square footage:
  1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
  2. Add the square footage of each of the planes together.

WHAT YOU’LL NEED TO MEASURE A ROOF:

  • Ladder
  • Measuring Tape
  • Calculator
  • Pen/Pencil
  • Paper

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Square Footage

  1. The first thing you’ll need to measure is the square footage of your roof.
  2. Position your ladder at the corner of one of your roof planes to determine the length.
  3. Extend your measuring tape as far as you can along the length of your roof and mark the area.
  4. Move your ladder down to the next section. Beginning with where you marked the first measurement, measure the next section.
  5. Continue measuring the length of your roof until you’ve covered the entire length area.
  6. Write down the final measurement.
  7. Next, you’ll want to measure the width of your roof plane. (Depending on how high your roof is, you may want to be up on it to take this measurement.)
  8. Use your ladder or your feet to measure the entire width of your roof plane.
  9. Write down the final measurement.
  10. Continue steps 1-9 on each of your roof’s planes.
  11. Multiply the length and width of each plane to get the square footage. Then, add all of your square footage measurements together to get the total square footage of your roof.

Slope

  1. You’ll also need to measure the slope, or angle, of your roof.
  2. To do this, position your ladder near the top point of your roof.
  3. With your measuring tape, measure vertically from the top point to the bottom point of your roof. (This is also called the rise.)
  4. Repeat this over 12 inches, then place the measurement over “12”. (For example: If your rise is 4 inches over 12 inches, then your slope measurement is 4/12.)
Calculating How Many Tiles You Need for Your Roof
  1. A ÷ X = D (Number of Tiles Needed for One Row Across the width)
  2. C ÷ Y = E (Number of Rows Needed)
  3. D x E = F (Number of Tiles Needed for One Side of the Roof)
  4. F x 2 = Total Number of Tiles Needed.

Can you measure a roof from the ground?

If you’re planning work on a roof and don’t have the building plans, taking preliminary measurements from the ground allows you to approximate the roof area and estimate some costs. … But, you can measure a gable or flat roof from the ground with the help of an assistant.
 

How do you calculate roof battens?

Measure from the top of the lowest batten to the top of the highest batten, then divide this number by the maximum gauge recommended by the manufacturer, and round this up to the nearest whole number. This will tell you how many courses are needed to tile your roof.

How do you measure a roof on Google Earth?

  1. On your computer, open Google Earth.
  2. Search for a place, or select a location on the globe.
  3. On the left, click Measure. . …
  4. Click the map to set measurement points.
  5. To remove a point, on the right, click Undo .
  6. To complete your line measurement, double-click on your last point, or click Done .
 
Roof battens: Provide a breathable space allowing any condensation to be eliminatedIncrease the structural performance of roof truss systems. Enable roofing materials to be secured firmly to the roof. Assist with correct alignment of roofing sheets.

How many bundles of shingles do I need for a 12×12 roof?

Bundles. Asphalt shingles and most other roof shingles are typically available in bundles. For each roofing square or 100 sq ft, you’ll need three bundles of shingles.

How many bundles of shingles do I need for a 10×10 shed?

How many shingles would I need for a 10×10 Gambrel shed roof? – Quora. Well, I did the job myself and the answer is: 5 packs.
 
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Roof Square Footage By Address

Can I measure a roof from Google Maps?

The good news is there is a way to measure your roof in a safe and accurate way, all from the comfort of your home: use Google Earth. With just a few clicks, you can search for any address, get a bird’s eye view of your roof, and get the roofing measurements that you need.
 
To find your roof’s total square footage:
  1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
  2. Add the square footage of each of the planes together.

How do you estimate roofing?

To do this, measure the length and width of each plane on the roof, including dormers. Then, multiply length x width to get the square footage of each plane. Finally, calculate your roof’s total square footage by simply adding the square footage of each of the planes together.
 

Roof Size and Pitch

A new roof on a 1,000-square-foot house costs an average of $4,000 to $5,500 while the cost to replace a 3,000-square-foot home’s roof can rise to an average of $11,200 to $16,000.

What is the average price to tear off and replace a roof?

Around $12,000 to $15,000
 
Most homeowners can expect the average cost to tear off and replace a roof to be around $12,000 to $15,000. This price is based on a home with 3 bedrooms, 2 bathrooms, a walkable roof pitch, a little roof complexity, and dimensional asphalt shingles.
 

Average Cost to Replace a Roof 

House (& Roof**) by Square FootRe-Roofing Cost*
1,100 (1,160)$4,200 – $6,000
1,200 (1,265)$4,500 – $6,500
1,500 (1,581)$5,500 – $8,000
1,600 (1,687)$6,000 – $8,500

CALCULATING THE AREA (TRUE)

If you want to get the exact area measurement for your roof, you can follow these steps:

  1. Once you have your roof’s pitch, divide the number by 12. (For example, if your roof’s pitch is 4 in 12, you would divide 4 by 12. This would yield 1/3.)
  2. Next, square your result. (If your number is 1/3, squared would yield 1/9.)
  3. After that, add 1 to your number. (1/9 + 1 = 10/9.)
  4. Next, figure out the square root of your new number. (The square root of 10/9 is 1.05.)
  5. Next, use your measuring tape to measure the length of your house. (Be sure to include overhangs.)
  6. After that, measure the width of your house. (Be sure to include overhangs.)
  7. Multiply your house length by your house width to get the area. (For example, 40 feet x 30 feet = 1,200 square feet.)
  8. Next, multiply the area by your roof’s pitch. (1,200 x 1.05 = 1,260 square feet.)
  9. To allow for hips, ridges, and waste, add 10% of your final number for a gable roof and 17% of your final number for a cottage roof. (Your total number would be either 1,386 or 1,474 square feet.)
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Roofing Calculator – How to Measure a Roof

How to Calculate Total Square Footage of Your Roof. To find your roof’s total square footage: Measure the length and width of each plane on the roof (including dormers) then multiply length times width. Add the square footage of each of the planes together.

What is a roofing square?

A lot of different factors determine the cost of your new roof. One of the biggest factors is the size of your roof that’s calculated by a measurement called a “roofing square”.

A roofing square is a 10×10 area that’s equal to 100 square feet of roof surface. The amount of roof squares determines how much roofing materials and labor it takes to replace your roof. 

The more squares your roof has, the more your roof replacement costs. Usually, it takes about 3 bundles of roofing materials (asphalt shingles) to fill a roofing square. 

But it ultimately depends on what type of roofing material you choose for your roof replacement. Some homeowners get confused by the term “roof square” and like to see the cost broken down by square footage. 

If this sounds like you, all you have to do is take the cost per square and divide it by 100. For example, if the cost of your roof is $600 per square, that comes out to $6.00 per square foot. 

If there’s any confusion about the terms you see on your roof estimate, don’t hesitate to ask the roofing contractor to explain them until you fully understand. 

Estimating Roof Area Using Pitch and Square Footage

If you are mathematically inclined or have a roofing calculator, you can estimate the roof area if you know the pitch of your roof and the square footage of your home. To illustrate, if your pitch is 4/12 and your two-story home has 1,400 square feet on each floor, these are the calculations.

• Divide the pitch. For a 4/12 pitch, the answer is 1/3.
• Square the above answer, which in this example would yield 1/9.
• Add 1, expressed as a fraction. That is, you would add 9/9 + 1/9 for a total of 10/9.
• Take the square root of 10/9, which is approximately 1.054.
• Multiply 1.054 by 1,400, the square footage of the home used in this example. You should get 1,475.6.
• Divide 1,475.6 by 100 to determine the number of squares required. You will need at least 14.756 squares of roofing. However, you should add about 10 percent for starter strips, valleys, waste and hip and ridge.

Estimating Materials Based on Actual Measurements

Measuring each roof plane requires you to actually go onto your roof. If your roof has a number of planes and numerous hips, ridges and valleys, this is the most accurate way to calculate the materials needed. Take a metal tape measure and a pen and paper. Measure each plane’s length and width. Record your measurements. Once you are safely on the ground, use your measurements to determine the square footage.

• For rectangular areas, multiply the length by the width. For example, if a plane measures 30 feet by 100 feet, this would be 3,000 square feet.
• For triangular areas, you may need to dust off your geometry book. If the area forms a right triangle, you can make use of the Pythagorean theorem. Otherwise, you might want to look up how to calculate the semiperimeter and then use Heron’s formula to find the area.
• Be sure to add extra for valleys, hips and ridges.