6 min read · Updated 2026-01-15
Can Moss Cause Roof Leaks?
Heavy moss cushions hold water against tile laps and force it sideways under the lap, where it can wet the felt or even reach the timber.
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Heavy moss cushions hold water against tile laps and force it sideways under the lap, where it can wet the felt or even reach the timber.
Why thick moss is a leak risk
Water moves laterally rather than down the slope when there's enough moss to disrupt drainage.
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