Roof measurement reports have quietly become the most argued-over document in a roof claim. The adjuster has one. You have one. They disagree by a square and a half, the drip edge is forty feet short, and somebody’s waste factor is “10% because that’s what we use.” Every one of those disagreements is money, and most roofers settle them by shrugging.
We pulled the published accuracy claims, benchmarks, pricing and carrier relationships for the five providers roofers actually use, then looked at where the numbers come apart and what that means when you write a supplement. Short version: the reports are better than most roofers think, the differences between them are smaller than the vendors imply, and the money isn’t in which report you buy. It’s in what you do when two of them disagree.
What “98.77% accurate” means, and what it doesn’t
Only one provider has an independent, third-party benchmark against a physical standard. In April and May 2025, a surveying firm called CompassData measured single-family homes in the Denver metro with drone and terrestrial LiDAR, then compared the results to EagleView’s reports. EagleView came in at 98.77% on roof lines (an average miss of about 2.4 inches per edge), 98.43% on roof area (an average miss of 5.61 square feet), and 98.49% on slope. That’s a real study with a real yardstick, and it’s the number you’ll see on every EagleView sales page.
Two caveats. First, the sample size was never disclosed, so nobody outside EagleView knows whether that’s fifty roofs or five hundred. Second, Denver single-family homes with clear imagery are the easy case. Independent contractor comparisons cited by software reviewers put EagleView closer to 3% variance on unusual roofs, with tree cover as the main failure mode.
Everyone else self-reports:
- Hover states “within 2–5%” on its own roofing page. Its most rigorous public figure is a carrier pilot on interiors: 97.74% on floor areas and 96.73% on wall areas, benchmarked against senior adjusters, not LiDAR.
- GAF QuickMeasure states 95% accuracy with no named methodology.
- RoofSnap discloses a 1–3% band “when drawn correctly,” which is the honest way to describe any satellite-traced report.
- Roofr publishes per-report pricing and a two-hour delivery guarantee but no accuracy benchmark at all.
So the spread between the best-documented report and the least-documented one is roughly 1% to 5% on area. On a 30-square roof, 5% is a square and a half. That’s the whole argument in most claims, and it’s smaller than the waste factor.
Roof measurement reports, provider by provider
| Provider | How it measures | Accuracy claim | Xactimate ESX | Typical residential price | Who else uses it |
|---|---|---|---|---|---|
| EagleView | Plane-captured oblique imagery + computer vision; 94% of U.S. population in archive | 98.77% (independent LiDAR benchmark, 2025) | Yes, native | $15–$60 Bid Perfect; up to ~$87 Premium at low volume | State Farm, Allstate, Farmers, USAA, Travelers, Liberty Mutual |
| Hover | ~8 smartphone photos walked around the house → 3D model | 2–5% (self-reported); 97.74% floors in a carrier pilot | Yes | $29–$69 per project, or $99/mo Pro | Travelers, State Farm and Nationwide led its Series D; “9 of the top 10 carriers” |
| Roofr | Aerial/satellite imagery, human-checked; DIY tracing option | None published | Yes, since April 2026 via a Verisk collaboration (~$10 add-on) | $13–$19 | Retail-heavy roofers |
| GAF QuickMeasure | High-res aerial + 3D model; imagery source undisclosed | 95% (self-reported) | No (hand-key or re-import) | From $18 for GAF-certified | GAF-certified roofers; ships a GAF bill of materials |
| RoofSnap | Nearmap + Hexagon imagery, or your own drone photos | 1–3% when drawn correctly | No | $9 Half Snap, ~$16 Full Snap | Owner-operators, low volume |
Prices and features are as published in mid-2026 and change often. Note the ESX column. Until April, EagleView and Hover were the only two reports that dropped straight into Xactimate. Roofr’s Verisk deal changed that, which matters because Xactimate is where the adjuster’s number lives and where your supplement has to live too.
Why two roof measurement reports on the same house disagree
If the reports are all within a few percent of the truth, why do the adjuster’s and yours land three squares apart? Because the error isn’t random. It stacks in predictable places.
Imagery age. Aerial archives refresh every 6 to 24 months. A roof measured from a two-year-old flight doesn’t know about the addition, the new porch roof, or the tree that grew over the back slope. RoofSnap’s own documentation calls out rural and new-construction properties as the failure mode for exactly this reason.
Obstruction. Tree canopy is the number one cause of a bad aerial report. Reviewers benchmarking the tools put tree-obstructed failure around 8% for aerial reports versus roughly zero for Hover, because a photo taken from the ground sees under the branches. That’s Hover’s real advantage, and it has nothing to do with the headline accuracy number.
Edges, not area. The 98% figures are about total area. The line items that drive a supplement are linear: eave, rake, ridge, hip, valley, step flashing. A 2.4-inch average error per edge is nothing on one edge and forty feet on a cut-up hip roof with thirty of them. Two reports that agree on squares can still disagree on drip edge by a full stick length.
Pitch rounding. Most reports bucket pitch to the nearest whole number. A 6/12 read as 7/12 changes the steep charge, the area multiplier and the waste math. On smartphone-photo reports, pitch is the measurement users complain about most, and it can be edited after the fact, which cuts both ways in a claim.
The waste factor isn’t a measurement. This is the big one. EagleView’s reports now include a “Suggested Waste Factor,” which EagleView explicitly markets to carriers as a benchmark to “avoid overpaying on claims.” Xactimate does not apply waste automatically; whoever writes the estimate types it in, and the industry default is 10% for gable, 15% for hip, regardless of geometry. A roofer who has been arguing waste with adjusters for fifteen years said it best on a roofing forum: the carrier’s reports come in “consistently low” and the desk is “absolutely stuck on 10 and 15.” Waste is where most of the disagreement between two otherwise-accurate reports actually lives.
The carrier had a report before you did
Carriers have standardized on two vendors. EagleView is the aerial report behind most first estimates at the majors. Hover is the other half of the stack, and the carriers on its cap table (Travelers, State Farm, Nationwide) have the deepest integration. Hover Connect lets the carrier text the homeowner a link, have them walk the house with a phone, and deliver measurements into Xactimate before any adjuster is assigned. Verisk, which owns Xactimate, has integrations with both, and its XactGen product is being built to auto-generate the adjuster’s estimate from that kind of input.
Read that as a roofer: the measurement on the carrier’s first estimate is increasingly not a person’s measurement. It’s a report the homeowner or a third-party inspector generated, run through a default waste factor, on imagery of unknown age. It will be close. It will also be short in the same three or four places every time.
What this means for your supplements
1. Buy your own report, and buy the ESX. A PDF is a picture. An ESX file is a sketch the adjuster can open in their own software and compare line by line. EagleView, Hover and now Roofr all provide one. If your report costs $19 and the ESX add-on is $10, that’s the cheapest documentation you’ll ever attach to a supplemental roofing estimate.
2. Compare facets, not totals. Put the two reports side by side and check each plane’s area and pitch, then each edge length. Disagreements cluster: a missed dormer, a porch roof counted at the wrong pitch, an eave the aerial couldn’t see under the trees. Name the facet in the supplement. “Your report shows facet F4 at 6/12; the pitch gauge photo attached shows 8/12” is a sentence an adjuster can approve. “Your squares are low” is not.
3. Treat waste as arithmetic, not opinion. The strongest waste argument is a calculation, not a percentage. Count the hips, valleys, rakes and penetrations, show the cut loss per course, and attach it. EagleView’s own suggested waste is often above the 10/15 default on complex roofs, and it’s the carrier’s vendor, so cite it back to them.
4. Field-verify the three things aerial gets wrong. Pitch (gauge photo on each distinct slope), eave overhang and edge lengths (tape a few and photograph the tape), and anything under tree cover. Those are the measurements that beat a satellite, and they take twenty minutes. The full photo set is in our roof supplement photo checklist.
5. Remember that geometry drives the line items you’re really fighting for. Squares move the shingle line. Edge lengths move drip edge, starter, ice barrier, ridge cap, valley metal and step flashing, and those are the code items adjusters miss most often. A report that’s 98% right on area and 40 feet short on eave costs you more on the drip edge line than on the shingles.
Which report should a roofer order for insurance work?
For claims, order the report the carrier is most likely to be looking at, in the format their software reads. In practice that’s EagleView with ESX on most files, because you’re arguing against an EagleView-derived number and the adjuster can open your sketch in Xactimate without redrawing it. Hover earns its place on tree-covered and cut-up roofs where aerial imagery misses, and it’s the right tool when you’re doing siding and gutters on the same job. Roofr is now a credible budget option for insurance work thanks to the ESX add-on, and it’s the obvious choice for retail-heavy shops that don’t want two subscriptions. GAF QuickMeasure and RoofSnap are fine for retail bids and material orders; on a claim, the missing ESX means someone re-keys the roof, and every re-key is a chance to lose an edge.
Whatever you order, roof measurement reports are the starting point, not the argument. The report proves the roof is a certain size. The supplement proves what that roof is owed.
If reconciling the adjuster’s measurements against yours, facet by facet, is not how you want your project managers spending their afternoons, that’s what our estimators do. Former field adjusters write the supplement from your report and the carrier’s, cite the difference line by line, and work it until the revised estimate lands. See how EOD’s roofing supplement services work, check our pricing (10% of the increase — no increase, no fee), or get in touch.
Sources: EagleView / CompassData accuracy benchmark press release (June 4, 2025); EagleView Suggested Waste Factor press release; Hover for Roofing Contractors product page and carrier pilot case study (June 2025); Roofr and Verisk collaboration announcement (April 15, 2026); The Roofing Brief 2026 Aerial Roof Measurement Software Report (June 2026); vendor pricing pages as of mid-2026. Accuracy figures other than EagleView’s are vendor self-reported. Estimate on Demand writes and negotiates roofing supplements on behalf of roofing contractors; we are not public adjusters, do not represent homeowners, and do not promise any specific increase on any claim.
