The morning after a strong autumn windstorm, many GTA homeowners find something unexpected on the lawn: a strip of shingle, a ridge cap, or a scatter of dark pieces by the downspout. Missing shingles are one of the most common kinds of storm damage in Ontario, and they are also one of the most misunderstood. A single gap may look minor, but it can expose nails and underlayment to the next rain, and it is often a sign that other shingles nearby have loosened too. This guide explains why shingles release in wind, what you can safely notice without going near the roof, how a crew protects the roof temporarily, why colour matching has limits and how to document the damage for an insurance claim.
Why missing shingles happen in autumn windstorms
Asphalt shingles are held down two ways: by nails driven through a specific area near the top of each shingle, and by a strip of heat-activated sealant that bonds each course to the one below. Wind damage almost always means one or both of those holds has failed. Understanding why helps explain what the repair has to fix, and it is the starting point for any professional roof repair after a storm.
Unsealed tabs
The sealant strip needs warmth and sunlight to bond. On shaded slopes under mature trees, on roofs installed late in the season, or where dust and pollen got onto the strips before they sealed, some tabs may never have bonded properly. Over many years, the bond on well-sealed shingles can also weaken through repeated heating, cooling and movement. An unsealed tab is free to flap in the wind, and once it lifts, the wind can work on the nails underneath.
High nailing
Every shingle manufacturer specifies a nailing area. Nails driven above it hold the shingle by less material and may miss the top of the course beneath. High-nailed shingles can look perfect for years and then pull free in the first truly strong gust. It is one of the most common installation faults found when roofers examine wind damage.
Age
As asphalt shingles age, they lose flexibility, shed granules and become brittle, especially on slopes facing the sun. Older shingles can crack along the nail line when wind flexes them, or tear around the nails rather than lifting cleanly. A roof nearing the end of its life tends to lose shingles in storms that a newer roof would ride out.
Edges
Wind uplift is strongest at the eaves, rakes, ridge and corners. Edge shingles without a proper starter course, ridge caps that were not fastened or sealed well, and rake edges with long overhangs are all common places for missing shingles to start.
| Cause | What is happening | Where it usually shows |
|---|---|---|
| Unsealed or debonded tabs | Sealant never bonded, or the bond weakened with age | Shaded slopes, late-season installs, older roofs |
| High nailing | Nails above the specified area hold too little material | Anywhere, often in patches where one installer worked |
| Too few nails or overdriven nails | Inadequate hold, or nail heads cutting through the mat | Scattered across a slope |
| Ageing and brittle shingles | Shingles crack or tear at the nail line when flexed | Sun-facing slopes on older roofs |
| Weak edges | Missing starter, poorly fastened ridge caps or rakes | Eaves, rakes, ridge and corners |
| Previous repairs | Patches not nailed or sealed to the manufacturer’s method | Around older repair areas |
What homeowners can safely notice
After a storm, the right place to stay is on the ground and inside the house. Do not climb a ladder, go onto the roof or try to replace or nail anything down yourself. Wind-damaged roofs often have loose material that can shift underfoot, and wet shingles and leaves make any roof slippery. The useful clues are all ones you can spot without going up:
- Pieces in the yard. Whole shingles, partial tabs or ridge cap pieces on the lawn, deck, garden or walkway.
- Debris at the downspouts. Shingle fragments or heavy granules washing out of the downspout outlets after the storm.
- Water inside. New drips or stains on top-floor ceilings, especially near exterior walls, around light fixtures or in closets.
- Noise during wind. A flapping or slapping sound from overhead during gusts can mean tabs have come unsealed.
Keep any missing shingles or pieces you find. They help the roofer identify the product and are useful for an insurance claim. Also stay well clear of any fallen branches or wires after a storm. If a power line is down or tangled with a tree near the house, keep away and call your local electricity utility, or 911 if there is immediate danger.
How a crew assesses the damage
When a professional arrives, the visible gap is only part of the assessment. Wind that tears off one shingle has usually tested many others. With proper fall protection, the roofer typically checks:
- How many shingles are missing, and on which slopes.
- Neighbouring shingles that have lifted, unsealed or creased. A creased shingle has had its mat bent sharply and will not lie flat or seal properly again, so it normally needs replacing even if it is still attached.
- Nail placement in the damaged area, which shows whether high nailing contributed.
- Exposed underlayment and whether water has reached the deck.
- Ridge caps, edges, flashing and vents for related damage.
- The attic, where accessible, for wet insulation or staining.
The result should be a clear explanation of what was damaged, why it likely failed and whether the problem is isolated or widespread. Photos taken by the roofer during the inspection help you understand the findings and support any insurance claim.
Temporary protection by a crew
If a storm has left the roof open and rain is coming, the first job is to stop water getting in. Depending on the damage and the weather, a crew may:
- Install replacement shingles straight away, if suitable shingles are on hand and conditions allow safe work.
- Cover the gap with underlayment slid under the course above and fastened, so water still sheds over it.
- Tarp the area, with the top edge tucked under intact shingles or run over the ridge, and the edges battened with wood strapping so wind cannot get underneath.
- Hand-seal lifted tabs on sound, uncreased shingles using dabs of compatible roofing cement, following the manufacturer’s method.
Temporary measures are meant to last days or weeks, not seasons. A tarp left through the winter can trap moisture, tear in wind and damage the shingles beneath it. The permanent repair should be scheduled as soon as materials and weather allow.
After a widespread storm, roofing companies across the GTA get many calls at once, so temporary protection often comes first and permanent repairs follow. If you are told to expect a wait, ask whether temporary protection can be put in place in the meantime.
The permanent repair
Replacing missing shingles properly is more involved than slipping new pieces into the gap. The crew carefully breaks the sealant bond on the courses above the damaged area, removes the remaining nails of the damaged shingles, slides new shingles into place, nails them within the manufacturer’s nailing area and hand-seals the lifted tabs back down where needed.
Autumn timing matters here. Older shingles become stiffer and more brittle as temperatures drop, and lifting them to reach the nails can crack them. Experienced crews work carefully on cold mornings, may wait for the warmer part of the day and replace any shingles that crack during the repair. New shingles installed late in the season may not self-seal until warmer weather, which is another reason hand-sealing is common on autumn repairs.
| Repair approach | When it is used | Typical estimate range |
|---|---|---|
| Emergency tarp or underlayment cover | Open roof with rain coming, materials not yet on hand | Often $300 to $900 |
| Replace a few missing shingles and reseal | Isolated damage on a sound roof | Often $300 to $800 |
| Replace a larger area and edges | Several areas or an edge, ridge or rake section lost | Often $800 to $2,500 |
| Hand-seal unsealed tabs across a slope | Tabs lifting but not creased or torn | Often $400 to $1,200 |
| Full slope or roof replacement | Widespread release, brittle shingles or repeated blow-offs | Quoted individually after inspection |
What a wind repair really costs turns on the height and pitch of the house, access, the shingle type, how much damage the inspection finds and whether matching material can be sourced, so use the table as a rough guide only.
When a repair is not enough
Replacing missing shingles makes sense when the rest of the roof is sound. A roofer will usually raise the question of a larger repair or replacement when the inspection shows one or more of these:
- Shingles lifting or unsealed across most of a slope, not just around the gap.
- Shingles so brittle that they crack when the courses above are lifted for the repair.
- Widespread high nailing, which means more missing shingles are likely in the next storm no matter how carefully the gap is patched.
- Repeated blow-offs on the same roof over the last few seasons.
- Heavy granule loss, curling or cracking that shows the roof is near the end of its service life.
None of these mean the roof must be replaced immediately. They mean a patch is likely to be the first of several, and it is worth weighing the cost of repeated repairs against planning a replacement in a dry stretch of weather.
Colour matching limits
Homeowners are often surprised that new shingles rarely match the rest of the roof perfectly. There are several reasons, and none of them means the repair was done badly:
- Weathering. Shingles that have been on the roof for years have faded and lost granules. Even the exact same product will look different when new.
- Discontinued lines and colours. Manufacturers change their colour ranges, and the original shingle may no longer be made.
- Production variation. Colours can vary slightly between production lots.
- Size and profile. Shingle dimensions and exposure have changed over the years, and an older roof may use a size that current products do not match. Shingles with different exposures do not course together neatly, so a roofer has to work around the difference.
- Three-tab versus laminated. If the existing roof is three-tab and the closest available product is laminated, the patch will look different in thickness and pattern.
Roofers have a few ways to reduce the difference. One common approach is to borrow matching shingles from a less visible area, such as a back slope or a section hidden by a dormer, use them on the visible repair, and install new shingles in the hidden spot. Whether that is practical depends on the roof.
If the mismatch matters to you, or if the roof is near the end of its life anyway, it may be worth discussing whether a full roof replacement makes more sense than repeated repairs. Some insurance policies address matching, and many do not, so check your own policy wording.
Documentation for insurance
Wind damage is often covered by home insurance, but coverage depends on your policy, its deductible and the cause of the damage. Damage from a sudden windstorm is treated differently from wear and tear on an old roof. Good documentation makes the process smoother whatever the outcome.
| What to document | Who gathers it | Why it helps |
|---|---|---|
| Date and time of the storm | Homeowner | Links the damage to a specific weather event |
| Photos of debris in the yard and at downspouts | Homeowner, from the ground | Shows the damage occurred and what came off |
| Photos of interior stains or water | Homeowner, from inside | Records any resulting damage to ceilings and contents |
| Shingle pieces found | Homeowner keeps them | Helps identify the product and its condition |
| Roof photos and a written inspection report | Roofer | Shows the extent of damage and its likely cause |
| Receipts for temporary protection | Homeowner from the roofer | Many policies expect reasonable steps to prevent further damage |
| Weather records for the date | Homeowner or adjuster | Supports the timing and severity of the wind event |
Contact your insurer promptly and ask how they want the claim handled. Some want an adjuster to see the damage before permanent repairs; most expect you to arrange temporary protection to prevent further damage in the meantime. Keep copies of everything, and get the roofer’s report in writing.
Missing shingles: common questions
Are a few missing shingles an emergency?
How do I know shingles came off if I cannot see the roof?
Why did my roof lose shingles when my neighbour’s did not?
Will the new shingles match?
Does insurance cover missing shingles after a storm?
When is replacement better than repair?
Get missing shingles repaired before the next storm
A small gap left by the wind is easiest and least expensive to fix quickly. If the wind has left gaps in your roof, The Roof Technician can assess the damage, arrange temporary protection where it is needed and talk you through repair or replacement. Ask for the findings in writing, with photos, so you have them ready for your insurer.
Call us today at (416) 826-0040 or request a free estimate.
Repairing storm-damaged roofs across Toronto and the GTA.