Surface changes
What Are the Black Streaks on My Roof?
Dark streaks can be associated with algae. Discoloration alone does not establish that a roof leaks or needs replacement.
Understand the problem →THE HOMEOWNER’S FIELD GUIDE
Something wrong overhead?
Start with what you see.
A stain, a drip, a shingle in the yard. Understand what it could mean, what to look for safely, and which questions to ask next.
Find your symptom ↓What are you noticing?
3 answers · Showing 1–3
Surface changes
Is Moss Growing on My Roof a Problem?
Moss can hold moisture around shingles and hide their condition. Treatment should suit the roof material and its condition.
Understand the problem →
Surface changes
Why Do My Roof Shingles Have Bubbles or Blisters?
Small raised blisters in shingles are different from a broad roof buckle. Their cause and significance need assessment before deciding on cleaning, repair or a warranty inquiry.
Understand the problem →SAME SYMPTOM. DIFFERENT CAUSES.
A ceiling stain does not always mean a roof leak.
Rainwater, a plumbing leak and attic condensation can leave similar marks. The timing and location help narrow the possibilities.
After rain
Look for a connection to weather, roof openings and exterior walls.
During cold weather
Widespread attic moisture may involve condensation and indoor air leakage.
After using plumbing
A bathroom or pipe above the stain may point to a different trade.
Keep exploring
Use these answers alongside project photographs, cost planning and service details.