Fix it
Why are my shingles cracking?
Asphalt shingles crack when their oils dry out — from age, heat, or a manufacturing run that aged early. A few cracked tabs is maintenance; cracking across the whole south face is a countdown.
What it usually is
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Age and UV exposure
Shingles live hardest on south- and west-facing planes. Fifteen to twenty-five years in, the mat shrinks, edges curl and surface cracks join up — granule piles at the downspout splash blocks are the confirming sign.
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Poor attic ventilation cooking them from below
An attic that runs 30 degrees over ambient bakes shingles from underneath and can halve their life. Check whether the cracking is worst over the hottest part of the attic.
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Hail bruising that surfaces later
Hail crushes the mat without always breaking the surface; the cracks appear months later in a spatter pattern rather than along edges. This version may be an insurance conversation.
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A defective shingle batch
Whole-roof cracking well before year fifteen, uniform across all exposures, points at the product rather than the environment.
What you can check yourself
Photograph the worst areas and note which directions they face. Check attic temperature and whether soffit and ridge vents are open and unblocked. Look in the splash blocks for heavy granule loss. Do not walk a brittle roof — cracked shingles break underfoot.
When it’s a job for a pro
A roofing partner can tell age-cracking from hail bruising in minutes, which matters because one is a repair plan and the other may be a claim. Widespread cracking is a re-roof conversation better had a year early than a season late.
Replacing scattered cracked shingles runs $200 to $700; ventilation corrections $300 to $900. Full replacement is priced per square, so catching it before deck damage keeps the bottom of the range in play.
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