Key takeaways
- Most roof claim estimates in Texas are written in Xactimate. Reading them line by line is the fastest way to find what is missing.
- Check measurements, waste, tear-off, underlayment, flashing, vents, drip edge, starter, and ridge before arguing about price.
- In Corpus Christi, re-roofing requires a permit and a TDI WPI-1 windstorm form, and the TDI windstorm program covers re-roofs and roof repairs.
- Code-driven items may fall under ordinance or law coverage rather than the base roof estimate.
- Gaps should be raised in a written supplement with photos and measurements. Disputes over the amount may go to appraisal.
A roof estimate from your insurance company can look complete at a glance: a dozen lines, a total, a depreciation figure, and a check. But many roof claims that feel "underpaid" turn out to have specific, fixable problems in the estimate itself. Knowing how to review an underpaid roof insurance estimate line by line lets you find those problems and raise them clearly, instead of arguing about a single total.
This guide is written for homeowners and business owners in Corpus Christi and the Coastal Bend, where roofs face hail in the spring, high winds, hurricanes, and salt air. It is general information. Coverage depends on your policy and the facts of your loss.
Start with the estimate's structure
Before you look at individual items, get the full estimate, not just the summary page. A complete Xactimate estimate usually includes:
- A cover page with the claim number, date of loss, type of loss, and the adjuster's name.
- A roof diagram or measurement report showing each roof facet, its area, and its pitch.
- Line items grouped by area (main roof, garage, porch), each with quantity, unit, unit price, tax, replacement cost, depreciation, and actual cash value.
- A summary page showing totals, depreciation, deductible, and net claim.
If any of those pieces are missing, ask for them in writing. You cannot check an estimate without the measurements and line items behind it.
How to review an underpaid roof insurance estimate, line by line
The table below lists items that commonly appear on a shingle roof replacement estimate, and what to check for each. Not every roof needs every item, and the right answer depends on the roof's actual construction and damage.
| Estimate item | What to check |
|---|---|
| Roof area (squares) | Does the total match the roof diagram, an aerial measurement, or a hand measurement? Are all facets, including porches and garages, included? |
| Waste factor | Is the percentage reasonable for the roof's complexity (hips, valleys, dormers)? |
| Tear-off and disposal | Is removal included for every layer actually on the roof? Is a dumpster or haul-off included? |
| Underlayment | Is underlayment replaced across the full area being reroofed? Is the type consistent with what is required for the job? |
| Ice and water / self-adhered membrane | If the adopted code, the windstorm certification, or the manufacturer's instructions call for it in certain areas, is it included there? |
| Drip edge and starter | Are drip edge and starter strip included along eaves and rakes, measured in linear feet? |
| Hip and ridge cap | Is cap included for every hip and ridge, at the correct linear footage? |
| Valleys | Is valley material (metal or membrane) included where the roof has valleys? |
| Step, counter, and wall flashing | Is flashing at walls, chimneys, and dormers replaced or reset rather than ignored? |
| Pipe jacks, vents, and ridge vent | Is each penetration counted? Are turtle vents, turbines, or ridge vent included? |
| Decking | Is there an allowance for replacing damaged or deteriorated sheathing found during tear-off? |
| Steep and high charges | Do the pitch and height on the diagram support additional labor charges for steep or two-story roofs? |
| Permit and windstorm certification | Are permit fees and the cost of windstorm inspection or engineering included, or addressed under another coverage? |
| Gutters, screens, and accessories | Are dented or detached gutters, downspouts, and satellite or solar detach-and-reset included where needed? |
Our guide to what carriers often miss in their scope goes deeper on several of these items, and our insurance claim supplements page explains how missing items are typically requested.
Measurements come first
If the roof area is wrong, every quantity-based line is wrong too. Compare the estimate's square count with an independent measurement. Look especially for porches, patio covers, and detached garages, which are easy to leave off. A small error in squares carries through tear-off, shingles, underlayment, and labor.
Repair vs. replacement
Some estimates scope a repair, such as replacing a few shingles on one slope, when the damage is spread across the roof. Others scope a full replacement on one slope only. Ask what the inspector found on each slope and how they decided between repair and replacement. Photos of each slope, including close-ups of hail or wind damage, help answer that question. If shingles are brittle or no longer available in a comparable product, note it and document it.
Coastal Corpus Christi roof considerations
Roofs in Corpus Christi and the surrounding Coastal Bend are subject to requirements that inland roofs may not be. Those requirements can affect what a proper repair costs, and an estimate that ignores them may not reflect the real job.
Permits and the WPI-1 windstorm form
The City of Corpus Christi requires a permit for re-roofing. Its roofing and siding submission includes a Residential Building Permit Application (Form 1003), a detailed scope of work naming the roofing method and materials, and a completed TDI WPI-1 form from the windstorm engineer or inspector responsible for windstorm compliance. The city's homeowner permitting guide also lists replacing more than 100 square feet of shingles, changing the roof slope, removing and replacing roof decking, and changing the roof material as work needing a permit.
TDI windstorm inspection and certification
TDI's Windstorm Inspection Program applies in the catastrophe area, which includes Nueces, San Patricio, Aransas, and Kleberg counties, and the covered work includes "re-roofs or roof repairs." Inspections are performed by appointed Texas-licensed professional engineers or TDI inspectors. Starting April 1, 2026, Windstorm Certificate of Compliance applications (WPI-1) must be certified to the 2024 IRC or 2024 IBC, and construction must be certified to be eligible for TWIA coverage. The city's own code amendment notes that its framing inspections do not take the place of TDI windstorm inspections or certifications.
In practice, that means the method of installation, fastening, and materials on a coastal re-roof are driven by what the windstorm certification requires, not just by what was on the roof before. Our article on the windstorm certificate (WPI-8) explains why that certificate matters for future insurability.
Local design criteria
The city's local IRC design table lists a design wind speed of 140/150 mph and identifies the area as a windborne debris zone. We do not list specific underlayment or fastening rules here, because those depend on the code edition, the roof system, and the certification. Ask your roofer and windstorm engineer which specific requirements apply to your roof, then compare their answer with the insurer's estimate. See our summary of local building codes for the adopted editions and permit details.
Ordinance or law coverage
Items required only because of current code, and not part of the original roof, are often handled under ordinance or law coverage, which pays up to its own limit. Code requirements alone do not create coverage. Check your policy for this coverage and its limit before assuming code items belong in the base estimate.
Depreciation and roof valuation
An estimate can have the right scope and still pay less than you expect because of depreciation or roof valuation terms. Look at the depreciation column for each line. Is labor being depreciated? Is the roof age correct? Is your roof covered at replacement cost, actual cash value, or a roof-age payment schedule? Our article on replacement cost vs. actual cash value explains how those terms change the check.
Metal roofs, low-slope roofs, and salt air
Metal roofs are common in the Coastal Bend, and they raise their own estimate questions: panel profile and gauge, fastener type, trim and closures, and whether a dented panel can be replaced individually or requires a larger section to match. Low-slope commercial roofs raise questions about membrane type, insulation, tapered systems, and drains. On any coastal roof, separate pre-existing salt-air corrosion from storm damage with clear photos and a written description. The insurer will look for that distinction, and so should you.
Check the cover page details too
It is easy to skip the first page of an estimate, but errors there can affect the whole claim. Confirm that the date of loss matches the storm that caused the damage, that the type of loss (hail, wind, hurricane) is correct, and that the right policy and deductible are applied. On coastal properties with both a homeowners policy and a TWIA policy, a wind or hail roof claim is often handled by TWIA, and the wrong deductible or policy on the estimate is worth catching early. If you are unsure of the date, our storm lookup tool can help you check NOAA and National Weather Service reports near your property.
Also look at the price list date and the tax line. Estimating software uses regional price lists that are updated over time, and after a major storm, labor and material prices in the Coastal Bend can move. If the estimate was written months ago, ask whether the pricing still reflects current local costs.
How to raise the gaps with your insurer
- Write it down. List each missing or underestimated item, the quantity you believe is correct, and the reason.
- Attach evidence. Include labeled photos, measurements, a contractor estimate in a comparable format, and any windstorm engineer requirements.
- Ask specific questions. "Why is drip edge not included?" is easier to answer than "Why is this estimate so low?"
- Request a reinspection if the adjuster missed slopes or components.
- Consider appraisal if you still disagree on the amount of loss. For TWIA claims, the demand must be made within 60 days after you receive the accept or partial-accept notice.
How a public adjuster can help
At Corpus Christi Public Adjuster, a roof claim review usually means inspecting and photographing the roof, measuring it independently, writing a detailed estimate in Xactimate, and comparing it line by line with the insurer's version. We then present the differences in a supplement and handle the follow-up. We cannot guarantee that the insurer will agree, and coverage depends on the policy. Fees are disclosed in a written contract before any work begins; Texas law caps public adjuster compensation at 10% of the insurance settlement.
Learn more about our roof damage claim help and insurance estimate review, or send your estimate to Corpus Christi Public Adjuster for a free claim review.
Frequently Asked Questions
How do I know if my roof insurance estimate is too low?
Compare it line by line with the roof itself and with a detailed contractor estimate. Common signs are measurements that do not match the roof, a repair scope where the damage is widespread, missing items such as drip edge, starter, flashing, or vents, no allowance for permits or windstorm certification, and heavy depreciation. A low estimate is not always wrong, but each gap should have an explanation.
What is a waste factor on a roof estimate?
Waste accounts for shingles that are cut and discarded around hips, valleys, rakes, and penetrations. Estimating software calculates it as a percentage added to the measured roof area. Complex roofs with many hips and valleys usually need more waste than simple gable roofs. If the estimate uses a waste percentage that does not fit the roof’s shape, ask how it was chosen.
Does a re-roof in Corpus Christi need a windstorm inspection?
TDI’s windstorm inspection program applies in the catastrophe area, which includes Nueces County, and covered work includes re-roofs and roof repairs. The City of Corpus Christi’s roofing permit submission also asks for a completed TDI WPI-1 form from the windstorm engineer or inspector. Starting April 1, 2026, WPI-1 applications must be certified to the 2024 IRC or IBC.
Can I ask the insurer to add missing items after I receive the estimate?
Yes. A request to add missing or underestimated items is often called a supplement. Send it in writing with photos, measurements, and a line-item explanation of each addition. Supplements are easier to approve when they are submitted before or during the work rather than long after it is finished.
What if the insurer and I still disagree on the roof estimate?
If the disagreement is over the amount of loss rather than coverage, most policies include an appraisal clause. TWIA claims have their own appraisal deadline: the claimant may demand appraisal within 60 days after receiving TWIA’s accept or partial-accept notice. Coverage disputes are different and may require a Texas attorney.
Sources and further reading
This article is general information about property insurance claims in Texas, not legal advice, and not a promise of any coverage or outcome. Your policy language and the facts of your loss control your claim.
