When contractors and adjusters order a aerial roof measurement report, they receive a comprehensive document packed with precise measurements. But what exactly does each number mean — and how do you use it? This guide breaks down every data point you'll find in a professional roof measurement report.
Total roof area is the foundational measurement in any report. It represents the actual surface area of all roof planes combined, measured in square feet. This is NOT the same as the building footprint. Because roofs are sloped, a house with a 2,000 sq ft footprint may have 2,400–2,800 sq ft of actual roof surface, depending on pitch.
Total roof area is used to calculate how many squares of shingles, how much underlayment, and how many other materials are needed. One square equals 100 square feet of roof coverage.
Tip: Total roof area is always the starting point for any material estimate. Every other calculation builds from this number.
Pitch describes how steep each section of roof is. It is expressed as a ratio — for example, 6/12 means the roof rises 6 inches for every 12 inches of horizontal run. Every roof plane in a report has its pitch measured and labeled individually.
Why does pitch matter? Because steeper roofs require more material (the same footprint has more surface area), are harder and more dangerous to work on, and affect which products can be installed. Low-slope and flat roofs require completely different materials than steep-slope roofs.
In a RoofQuantiX report, each roof plane is labeled with its pitch so you can immediately see which sections need standard installation and which require special handling.
These linear measurements are often overlooked but are critical for accurate material estimating. Here is what each one means:
The ridge is the horizontal peak line at the top of the roof where two roof planes meet. Ridge length determines how much ridge cap shingles or ridge vent you need. A longer ridge means more cap material.
Hips are the sloped lines running from the ridge down to a corner of the roof. Hip cap material must follow these lines. Hip length measurement helps calculate hip cap quantity.
Valleys are the interior lines where two roof planes slope toward each other. Water channels through valleys, making them critical waterproofing points. Valley length determines how much valley flashing or woven shingle material is needed.
Eaves are the horizontal edges at the bottom of the roof. Eave length determines drip edge, gutter, and starter strip quantities.
Rakes are the sloped edges at the sides of a gable roof. Rake length determines rake board, drip edge, and starter strip for those edges.
Combined, ridge + hip + valley + eave + rake measurements give you everything needed to calculate edge metal, flashing, and trim materials down to the linear foot.
Beyond total roof area, a complete report breaks down the area of each individual roof plane or facet. This is especially important on complex roofs where different sections may have different pitches or be covered with different materials.
For example, a house with a main gable roof and a dormer over the garage might have 6 separate roof planes. Knowing the area of each helps contractors plan material staging and identify which sections need special attention.
Waste factor is one of the most practical numbers in the entire report. It is calculated automatically based on the complexity of the roof — specifically the number of cuts required around valleys, hips, penetrations, and irregular shapes.
A simple gable roof with few cuts might have a 10% waste factor. A complex hip roof with multiple dormers and penetrations might have 15–20%. Learn more about how waste factor is calculated.
Using the correct waste factor prevents two costly problems: under-ordering materials (causing mid-job supply runs) and over-ordering (wasting money on unused materials).
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Order Your Report — Get Every Measurement in HoursEvery structure that breaks through the roof plane is a penetration. Penetrations create flashing requirements and potential leak points, so accurately mapping them is essential for complete material estimates and insurance claims.
A professional roof measurement report identifies and maps:
On commercial flat roofs, penetration mapping is especially detailed. HVAC curbs, drain locations, and equipment pads are all identified to support accurate membrane measurement and waterproofing estimates.
Every RoofQuantiX report includes high-resolution aerial imagery of the property. This gives contractors and adjusters a visual reference that confirms the measurements and helps identify any visible damage, existing repairs, or unusual roof conditions.
For insurance claims, aerial imagery provides documented visual evidence of the property condition at the time of the order. This timestamp is valuable when establishing pre-loss condition for storm damage claims.
Many reports include a materials summary that translates all measurements into actionable quantities. This typically includes:
With a complete materials summary, contractors can go from measurement report to supplier order in minutes rather than hours of manual calculation.
Commercial roof measurement reports include all of the above plus additional data specific to flat and low-slope roofing systems:
Once you have your report, here is the typical workflow for turning data into a bid:
This process eliminates guesswork from your estimates and gives you a defensible, data-backed number to present to homeowners or submit to carriers.
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Total roof area is the sum of all roof plane surfaces measured in square feet. It represents the actual area of roofing material needed, before waste factor is applied. This number is different from the footprint (floor plan area) of the building because sloped roofs have greater surface area than their footprint.
Waste factor accounts for the extra material needed due to cutting around penetrations, edges, valleys, and complex roof shapes. Standard waste factor is 10-15% for simple roofs and up to 20% or more for complex roofs with many hips, valleys, and dormers. The report calculates this automatically based on roof complexity.
Roof measurement reports map all penetrations visible from aerial imagery, including chimneys, plumbing vents, exhaust fans, skylights, HVAC units, solar panels, and any other structures that break the roof plane. Each penetration is shown on the diagram with its location identified.
Yes. Every RoofQuantiX report includes precise linear footage for ridges (peak lines), hips (sloped corner lines), valleys (interior corners where two roof planes meet), eaves (horizontal bottom edges), and rakes (sloped side edges). These measurements are critical for calculating ridge cap, valley flashing, and drip edge material quantities.
Everything you need to know about aerial roof measurement reports explained from the ground up.
EducationLearn how waste factor is calculated and why using the right number protects your margins.
How-ToA contractor-focused guide to understanding every section of your measurement report.