Roof decking missing from an insurance estimate
Roof decking is the sheathing under your shingles, and it is hard to evaluate until the old roof comes off, so first estimates often leave it out or allow only a small amount. If the roofer finds decking that is damaged by the covered loss or cannot hold fasteners for the new roof, document it with photos and notes before it is covered over by new roofing, then send the insurer a written supplement request. Pre-existing rot is often treated differently from storm damage, so keep evidence of the cause.
The estimate lists shingles, underlayment, flashing, and vents, but nothing about the boards or panels underneath them. Then the roofer tears off the old roof, finds soft, cracked, or water-stained decking, and tells you the repair will cost more than the insurer approved. Missing decking is one of the most common reasons a roof estimate falls short of the real job. This guide explains why it goes missing, what separates covered decking damage from excluded deterioration, and the records that make a supplement request easier to support.
What roof decking is and why it shows up late
Decking, also called sheathing, is the layer of plywood, oriented strand board, or planks that sits directly on the rafters and carries the underlayment and shingles. It gives the roof its solid surface and is what the roofing nails actually grip. Because it sits beneath everything else, nobody can judge its condition by looking at the roof from above or from the ground. Hail and wind can damage shingles without obviously harming the deck, while water that enters through a breach can soak the deck for days without any sign on the surface. The condition of the deck often becomes known only at tear-off, when the old layers are removed and the surface is exposed. That timing is the root of the problem. The estimate is written before the facts are known, the work happens after, and the gap between the two needs a process to close.
Why the first estimate often leaves it out
The adjuster’s inspection is a visual survey of the roof surface, and most estimates are built from what that survey shows. Decking is a hidden component, so it is frequently left off or covered only by an allowance meant to be revisited. Some estimates list decking by the sheet, and others add language that replacement will be reviewed if damage is found. Neither is wrong, but a homeowner who does not know the allowance exists may assume the entire job is priced. Ask the adjuster directly whether decking was included, how it was priced, and what the process is for adding more if it is needed. Ask the roofer the same questions from the other side: what condition they expect the deck to be in, what they will do when they find a problem, and how they will document it. A clear plan before the work starts is much better than an argument afterward.
Storm damage versus pre-existing deterioration
Coverage for decking depends on how it was damaged. Impact from a falling limb, damage from high winds, or storm water entering through an opening created by a covered event can all lead to decking that needs replacement as part of the claim. By contrast, decking that has rotted from long-term leaks, condensation, poor ventilation, or age is often treated as wear and tear, deterioration, or rot, which many policies exclude. An insurer may therefore ask whether the damaged decking is related to the storm at all. Your evidence should speak to that question directly. Photographs of the underside from the attic, notes on where the stains and soft spots are located relative to the storm opening, and your roofer’s description of what the wood looked like when exposed can all help show whether the damage is fresh or old. Honest documentation is the best approach, because a credible record helps sort out which decking is truly part of the loss.
Repair requirements that drive decking replacement
Even when decking is not visibly storm damaged, it may still need to be replaced to complete a proper repair. Shingle manufacturers publish installation instructions that expect a sound, nailable surface, and building codes generally call for a roof assembly that is properly supported and fastened. If decking is cracked, delaminated, soft, or so degraded that fasteners will not hold, a roofer may be unable to install the new roof to those requirements. Some roofs have spaced planks rather than solid sheets, and local rules may address what is required when such a roof is replaced. These requirements are a matter of the manufacturer’s instructions and your local building department, so ask both what applies and get it in writing. When the repair requirement is the reason for new decking, the contractor’s written explanation and any permit or inspection notes become key evidence. Whether the policy pays for it still depends on the cause and the coverage terms.
Inspection records worth collecting
Good records turn a verbal claim of hidden damage into something an insurer can evaluate. Photograph the attic side of the roof before work begins, looking for stains, daylight through boards, and damp or sagging areas. Ask your roofer to photograph the deck as soon as the old roofing is removed, and to mark each damaged area on the photos or on a rough diagram so the location and extent are clear. Request a written description of what was found, including the type of decking, the kind of damage, and the number and location of sheets or sections that need work. Keep dated copies of any moisture readings, notes from a building inspector, and invoices for the replacement material. If the exposed deck is left open overnight, additional photographs showing the condition at that time can be useful. Store everything in a single folder so you can send a complete package without hunting for documents later.
Asking for a supplement the right way
A supplement is a request to add costs that were not in the original estimate. Send it in writing as soon as the decking issue is confirmed, with the photos, the roofer’s written findings, and an itemized price for the added work. Ask the insurer to review it and to tell you in writing whether it wants a reinspection before the decking is replaced. If a reinspection is requested, schedule it quickly so the work is not delayed longer than necessary, and if the insurer does not respond promptly, follow up and document the attempts. Policies generally expect you to give notice of additional damage promptly and to protect the property from further harm, so do not let a dispute leave the roof open to the weather. If the work needs to proceed urgently, take photographs at each stage, keep the removed material if practical, and tell the insurer what you are doing and why.
How a public adjuster helps with decking disputes
A licensed public adjuster works for you, not the insurer. On a roof claim with a decking issue, they can review the estimate for gaps, coordinate with your roofer so the right photographs and measurements are captured at tear-off, prepare the supplement package, and communicate with the insurer’s adjuster about the cause and repair requirements. They can also help organize the evidence that separates storm damage from deterioration, which is often the heart of the disagreement. No professional can guarantee that a supplement will be paid, because the policy and the facts decide, but a clear, well-documented request is easier to evaluate. Ask for fees in writing, verify the license with your state department of insurance, and make sure you understand the agreement before you sign it.
Frequently asked questions
Why is decking missing from my roof estimate?
Adjusters usually inspect a roof from the surface and cannot see the condition of the sheathing below the shingles. Many estimates therefore include no decking or only an allowance, to be adjusted if more is found. The need is typically confirmed during tear-off, which is why photographs taken at that moment are so important.
Will the insurer pay for rotted decking?
It depends on the cause. Decking damaged by a covered event, such as wind, hail, a fallen tree, or storm water entering through an opening, may be part of the claim. Decking that has rotted from long-term moisture or deterioration is commonly treated as wear and tear and may be excluded. Evidence of when and how the damage occurred is what separates the two.
When should I tell the insurer about decking found during tear-off?
As soon as it is found, and ideally before the exposed decking is covered or replaced. Send photos and a short written note, ask whether the insurer wants to reinspect, and keep the contractor’s documentation. Prompt notice is usually expected under the policy and helps avoid arguments about whether the damage was real.
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