What you may notice
- A shingle or shingle tab on the ground
- An exposed dark area or visible underlayment
- Lifted edges after wind
- Cracks, tears, curled corners, or missing granules
- A color or texture difference showing an older repair
- Water stains appearing after wind-driven rain
Repair may be possible when
Damage is limited, compatible material can be obtained, surrounding shingles are flexible and serviceable, and the underlying deck and flashings can support a durable repair.
Replacement may need discussion when
- Damage is widespread
- Shingles are brittle, heavily worn, or failing across multiple slopes
- Leaks or repairs keep returning
- There are broader flashing, ventilation, or deck problems
- Matching and tying into the old material will not produce a reasonable repair
What to do now
Photograph visible damage from the ground, note the weather and timing, protect interior areas safely, and request an inspection. Do not walk the roof or attempt repairs in wind, rain, snow, or ice.
What each pattern of damage usually means
| What you see | Usual cause | What it implies |
|---|---|---|
| Edges curling upward across many shingles | Age, heat, and often inadequate attic ventilation | Roof-wide condition; repair buys little |
| Cracking in straight lines | Thermal cycling on an aged mat | Advanced wear; plan replacement |
| Shingles lifted but still in place | Broken seal bond, often after wind | May fail in the next moderate wind |
| A clean rectangular gap | Wind loss | Isolated and repairable if the rest is sound |
| Loss concentrated on one plane | That plane's exposure — wind, sun, or a wind-scour zone | Localised; the rest of the roof may have life |
| Granules gone with bare black patches | End-of-life wear | The asphalt is now exposed to ultraviolet light |
Why matching is rarely perfect
Weathered asphalt changes colour, and specific product lines get discontinued. A repair on a prominent plane can be visible even when it is executed well, and that is worth knowing before the work rather than after. On a rear or low-visibility slope it usually does not matter; on the front elevation of a house you are about to sell, it might.
Where a roof still has substantial life, a visible repair is normally the right economic answer. Where the roof is already near the end, an imperfect match is one more argument for planning the replacement rather than spending twice.
Do not let a small loss sit
An exposed area lets water at the underlayment and the deck, and underlayment is a secondary barrier rather than a roof. In this climate the gap between noticing a missing shingle and the next significant weather is frequently short.
The shingles around a gap have usually lost their seal too, which is why losses tend to continue in later, milder wind. Addressing the first loss promptly is often what prevents the second and third.
Page last reviewed August 16, 2026.