Maintenance
Once that first real cold front comes through, asphalt shingles stiffen up fast, and stiff shingles crack instead of flexing with the wind. If your roof’s already a little worn, this is usually when it starts to show.
Walk your yard after a cold, windy morning and check your gutters for small shingle granules or chips. That’s not normal wear, that’s shingles losing their grip in the cold. Attics matter here too: poor ventilation lets warm air meet cold air right under the deck, and the condensation that forms can look exactly like a leak even when it isn’t one.
If your roof is pushing 15-20 years, now is the time to get eyes on it, before the next hard freeze turns a small brittle spot into a real leak.