Why regular cleaning matters
Growth traps moisture and blocks water drainage
Light moss or lichen growth alone rarely harms an intact roof. It becomes critical once moss, algae and debris spread across larger areas: they then retain moisture on the roof surface, which can cause tiles to crack in frost, and increasingly block water drainage – rainwater backs up, penetrates under the covering and can reach the roof structure. Cleaning is carried out gently via rope access, directly on the roof, without scaffolding. I also inspect the roof for cracks, loose tiles or other issues along the way. On request, a hydrophobic treatment follows as an invisible long-term protection against moisture, algae and moss growth.
