Customer Says Shingles Are Coming Off Translation Decision Tree

Why this matters

"My shingles are coming off" sounds like a single problem and is actually four different failures with four different remedies and four different warranty and insurance outcomes. Shingles leave a roof because the wind exceeded the installed rating, because the self-seal strips never bonded, because the nailing was wrong, or because the shingles have aged past their sealant's life. Telling these apart matters for money and liability: a wind-rated assembly that blew off in a covered storm is an insurance claim; an improperly nailed roof that blew off in an ordinary gust is an installation defect; a roof whose sealant never activated is a workmanship or material issue; an aged roof shedding shingles is end-of-life. Translating the complaint into the right category before you quote keeps you from selling a repair the customer should be claiming, or claiming a loss that was really a defect. This tree sorts the four.

Symptom presentation

The pattern of loss is the tell. Shingles missing in a clustered swath along a rake, eave, ridge, or one slope, after a known wind event, reads as wind uplift of a marginally bonded or under-rated assembly. Tabs lifted but still present, flapping but not gone, reads as sealant that never bonded or has released. Shingles pulled off cleanly with the nails still in the deck, or shingles with tear-out at the nail line, reads as a nailing problem (high nails, overdriven nails, too few nails). Widespread brittle cracking, curling, and granule loss with shingles breaking apart rather than blowing whole reads as age and sealant exhaustion. Ask whether a storm preceded the loss, how old the roof is, and whether tabs are flapping or fully gone.

Quick checks

From the ground and then on the roof, document the loss pattern and location, note any recent severe weather and its wind direction, and pull the roof's age from the customer or the permit. On the roof, lift a few intact tabs by hand near the loss zone: do they resist (bonded) or peel freely (unbonded)? Examine a recovered or remaining shingle's nail line for the nail position relative to the nailing zone and for tear-out. Check granule cover and flexibility on a removed tab; brittle, cracking shingle is aged.

Look closely at how the shingles departed. A shingle that tore across the tab while the head stayed nailed points to wind overload of a bonded shingle. A whole shingle gone with clean nail holes points to the nails pulling through or the shingle never having sealed. Nail heads left sitting proud in the deck with no shingle around them point to high or overdriven nailing. Photograph the nailing zone on a remaining shingle in the loss area; the position of the nail line relative to the manufacturer's marked zone is the single most telling piece of evidence in the workmanship-versus-wind question.

Isolation tree

1. Clustered loss after a documented high-wind event, on the windward slope or edges, on a roof within its life? Suspect wind uplift. Determine the installed wind rating and whether the event exceeded it. If within rating, look for a contributing defect (edge sealing, starter course).
2. Tabs lifted or flapping but largely present, weak or no bond when lifted by hand? Suspect sealant failure: never activated (installed in cold weather and never warmed, or dust-contaminated strip) or released with age.
3. Shingles gone with nails still in deck, or nail-line tear-out, no extreme wind? Suspect nailing defect: nails placed above the nailing zone (high nailing), overdriven cutting the mat, or too few nails per shingle.
4. Brittle, cracking, curling shingles breaking apart with heavy granule loss, roof near or past expected life? Suspect age. The whole field is failing, not one zone.
5. Loss only at hips, ridges, or rake edges? Suspect cap or starter detailing rather than field shingles.

Confirming diagnosis

Confirm wind versus defect by checking the installed fastening and edge detail against the manufacturer's high-wind requirements. A roof that meets the wind-rated nailing and starter spec but lost shingles in a storm at or above its rating points to wind. A roof that lost shingles in an ordinary gust, or shows high nails and missing starter, points to a defect regardless of weather. Confirm sealant failure by the hand-lift test across the slope; broad unbonding is a sealing problem. Confirm age by the brittleness and granule-loss state of the field and by the documented install date. The hand-lift, the nail-line inspection, and the age check together resolve nearly every case.

Remediation

Wind loss within rating is a repair (replace lost shingles, hand-seal adjacent tabs) and often an insurance conversation. A defect (high nails, missing starter, no edge seal) is a corrected re-install of the affected area and a workmanship discussion, not a claim. Unbonded sealant on an otherwise sound roof can sometimes be hand-sealed under the tabs; widespread unbonding on a young roof is a material or installation failure to escalate. An aged, brittle field shedding shingles is end-of-life: spot repairs buy time but the roof is due for replacement, and the customer should hear that plainly rather than paying for repeated patches.

When you hand-seal replacement or adjacent shingles, use the manufacturer-specified roofing cement in the right quantity and location under the tab; over-sealing can trap water and under-sealing leaves the tab to lift again in the next blow. After any wind repair, walk the surrounding courses and re-seal any tabs the same storm broke loose, because a partial repair that leaves neighboring tabs unbonded simply moves the next failure one course over. Document the loss pattern, the nailing evidence, and the roof age in writing, since the same record that supports a legitimate insurance claim also protects you when the failure was a prior installer's workmanship rather than a covered storm.

References

• ASTM D3161, Standard Test Method for Wind-Resistance of Steep Slope Roofing Products (Fan-Induced Method).
• ASTM D7158, Standard Test Method for Wind Resistance of Asphalt Shingles (Uplift Force/Uplift Resistance Method).
• IRC R905.2, Asphalt Shingles (fastening, exposure, and wind requirements).
• NRCA Roofing Manual, Steep-Slope Roof Systems (shingle installation and wind-damage assessment guidance).