English (beta) · translation in progress — some pages still show the Dutch source.
Ventilatie en binnenklimaat

Schimmelvorming op zolder

Mold develops on cold, damp surfaces in stagnant air. In lofts, the corners near knee walls, behind furniture, and at thermal bridges are the most vulnerable spots.

Hoofdgids · 15 min lezenVentilatie en condens bij dakkapellen
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Conditions for mold

  • Sufficient moisture on the surface (often above 80% relative humidity).
  • Sufficiently long duration of this wet condition.
  • A substrate on which mold can grow (virtually any organic substrate).

Fighting visible mold without addressing the underlying building physics cause provides a temporary solution. Only when the surface becomes warmer and the air drier will the problem stay away.