Moss and discoloration
Dark streaks, moss or other growth on the roof, usually on shaded parts that stay damp.
OccasionalPlan for itRoof covering
Why it matters
Moss traps moisture against the shingles, which can make them deteriorate, lift or leak early. Discoloration can also be algae or a sign the shingles are aging.
How common is it?
Found in 5% of the homes HomeCloud evaluated, Sep 2025 to Oct 2026.
Counted by the finding's name on HomeCloud reports, so the true number can be a little higher.
How soon to fix it
HomeCloud reports list this as something to plan for rather than an emergency.
More roof resources
Types of roofs and how long they lastArchitectural vs. three-tab shingles, metal, tile and slate, and what a "lifetime" warranty really means.Types of roof flashing and how they workStep, kickout, valley, chimney and pipe flashing, and what to ask about in a roof replacement proposal.Replacing your roof with homeowners insuranceClaims, deductibles, depreciation and replacement cost coverage, with a North Carolina shingle-matching note.Roof shingle colors for siding and brickShingle color ideas for nine siding colors and common brick colors.
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