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How to read your East Tennessee roof estimate

How to read a roof insurance estimate in Knoxville and East Tennessee: squares, waste, tear-off, underlayment, ice barrier, ridge, steep and high charges, depreciation, ACV, O&P and supplements.

Last reviewed against official sources. General information, not insurance or legal advice.

Quick answer

Each line of an insurance roof estimate has a task, a quantity, a unit and a price. The total is replacement cost (RCV); depreciation is subtracted to get actual cash value (ACV); the deductible comes off that. Check measurements, pitch and steep charges, layers, the right material (metal or slate if that is what you have), code items, and overhead and profit. Send missing items as a documented supplement.

Steep, high and hard-to-reach roofs are common in the foothills and on Sevier County cabins. Check that the estimate includes steep and high charges where they apply and any access costs.

Where the prices come from

Short answer: many insurers and roofers use Xactimate, from Verisk, which prices tasks with regional price lists.

If your roofer's price differs, ask for the reason in writing, such as hard access on a mountain lot or specialty metal, and send it to the adjuster.

Reading the lines

  • Line item: one task with a code.
  • Units: squares (100 sq ft), linear feet, or each.
  • Waste: extra for cuts; higher on cut-up roofs and metal with many trim pieces.
  • RCV: replacement cost.
  • Depreciation: reduction for age and condition.
  • ACV: RCV minus depreciation.
  • Deductible: taken from the payment.
  • O&P: general contractor markup when several trades are needed.

Checking for gaps

Short answer: compare it with a licensed local roofer's estimate and confirm every measurement.

Make sure every roof section is listed, including porches and outbuildings. Confirm the pitch, the number of layers, and that metal or slate is priced as metal or slate. On steep cabin roofs, confirm steep and high charges and any equipment needed to reach the roof.

Common gaps

ItemWhy it gets missedHow to support it
Steep and high chargesPitch or height not recordedPitch measurement and photos
Metal trim and closuresOnly panels pricedManufacturer parts list for ridge, rake and eave trim
Fasteners on exposed-fastener metalAssumed reusableManufacturer instructions or photos of damaged screws
Slate replacementPriced as asphaltPhotos and a slate roofer's estimate
Ice and water barrier and drip edgeTreated as optionalCode section your permit office applies or manufacturer requirements
Second layerNot visiblePhoto at the edge or from tear-off
DeckingFound at tear-offPhotos and a count before covering
Permit and haul-offLeft offPermit fee and dumpster cost

Filing a supplement

Short answer: a written request with proof for each missing item.

  1. List each item and quantity.
  2. Attach photos, measurements, code sections or manufacturer instructions, and prices.
  3. Send it with your claim number and keep a copy.
  4. Photograph anything that will be covered by the work, and ask whether the insurer wants to see it.
  5. Ask for a written answer by a date.

Your roofer can document and price the work. Only you, or a licensed public adjuster you hire, should negotiate the claim itself; ask any contractor who offers to do it whether they hold a public adjuster license.

Payment example

Short answer: on many replacement cost policies, ACV minus the deductible comes first, then the withheld depreciation after the work is done.

Example (illustration): RCV $24,000, depreciation $8,000, deductible $3,500. First payment: $12,500. After completion and invoicing, the insurer would release $8,000, for $20,500 total. On an ACV policy, the $8,000 is not paid. Ask for your deadline to claim depreciation, and remember the suit limitation clause.

Far apart?

Ask the adjuster and your roofer to go through the differences together. If you still disagree, request a reinspection and see options for a low estimate.

Metal roof estimates: what to look for

Short answer: a metal roof estimate should name the panel profile, the metal gauge, the finish, the fastener system and every trim piece, not just a square-foot price.

Metal is common on Sevier County cabins, foothill homes and farm buildings, and it is priced differently from shingles. Check for:

  • Panel type: standing seam (hidden fasteners) or exposed-fastener panels (screws through the face). They are not interchangeable in price.
  • Gauge and finish: the replacement should be like kind and quality, for example the same gauge and a comparable paint system.
  • Trim: ridge cap, rake and eave trim, closures, and flashing at walls and chimneys, each as its own line.
  • Fasteners: new screws with washers on exposed-fastener roofs, since old ones may not reseal.
  • Underlayment: what goes under the panels, especially on low-pitch sections.

If only some panels are dented and the color has faded or been discontinued, ask how the insurer will meet Tennessee's reasonably uniform appearance rule on replacement.

Cabins and hard-to-reach roofs

Mountain lots can add real cost: steep driveways, no room for a dumpster, and roofs over steep slopes that need extra safety setup. If your roofer prices these, ask them to list each as a separate, explained line, with photos, so the adjuster can see why. Rental cabin owners should also keep booking records if the work causes cancellations, in case the policy covers lost rent.

Read the estimate with the suit clause in mind

Supplements and reinspections take time. If your policy's suit limitation is one year, keep track of where that clock may stand while you go back and forth about line items, and get legal advice well before it runs out.

An example: roofing lines on a Knoxville estimate

This shows how the roof section of an insurance estimate is often organized for a laminated shingle roof. Quantities are illustrative.

ItemExampleWhat to confirm
Remove roofing26 SQMeasured area; extra layers listed separately
Laminated shingles with waste29.5 SQWaste suits the roof's valleys and hips
Underlayment26 SQThe type actually going on
Ice and water membraneValleys, eavesIncluded where your roofer and local code call for it
Drip edge, starterLinear feetBoth eaves and rakes
Hip and ridge cap, ridge ventLinear feetListed, not folded into waste
Step and counter flashingLinear feetAt walls and chimneys
Pipe boots, ventsEachAll of them
Steep and high roof chargesBy squareOn slopes that need them
Permit, disposalEachActual local costs

For a metal roof, expect panel area, trim pieces (ridge, rake, eave, valley), closures, fasteners and underlayment as separate lines.

Depreciation

With replacement cost coverage, the first payment usually holds back depreciation until the work is done. Ask what roof age and life expectancy the adjuster used, and whether labor was depreciated. Send proof of the roof's age if they guessed. With actual cash value roof coverage, the depreciation is not recovered later. See ACV versus replacement cost.

Items beyond the roof

Hail and wind often damage gutters, downspouts, window screens, siding, the HVAC condenser, decks, fences and outbuildings. Make sure each damaged item appears on the estimate, sometimes under "other structures."

Questions for your roofer's estimate

  • Can you itemize it to compare line by line with the insurer's?
  • Which items are required by code or the manufacturer's installation instructions?
  • How did you measure the roof?
  • How will you price rotten decking found during tear-off?
  • Where are your prices higher than the insurer's, and why?

Frequently asked questions

What is a square?

100 square feet of roof.

Why is there a steep charge?

Steep roofs take more time and safety equipment, so estimates add labor for them.

What is a supplement?

A documented request to add missing items or quantities.

When is O&P included?

Often when a general contractor is reasonably needed to coordinate several trades.

What is a supplement?

A request to the insurer to add items or costs missing from the first estimate, such as decking found rotten at tear-off or code-required items. Send it with photos and an explanation, and keep your policy's suit deadline in mind.

Does the insurer pay overhead and profit?

Often when a job needs a general contractor to coordinate several trades. If your job does and it's missing, ask the adjuster why.

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Policies vary. Check your own policy and ask your insurer or agent about anything that affects your claim. Laws and rules can change; this page reflects official sources as of October 29, 2026. KnoxvilleRoof.com is not a contractor, insurer, adjuster or law firm.

Sources

  1. NAIC: A Consumer's Guide to Home Insurance
  2. TN Department of Commerce and Insurance: Homeowners and automotive insurance information
  3. United Policyholders: Claim guidance publications
  4. Verisk: Xactimate (the estimating software many insurers use)